


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
139 FNUS55 KRIW 180745 FWFRIW Fire Weather Planning Forecast for Western and Central Wyoming National Weather Service Riverton WY 145 AM MDT Mon Aug 18 2025 .DISCUSSION... ...Yellowstone NP and Teton dispatch areas (includes fire weather zones 140...414...415...and 416)... Warming trend and dry conditions expected through Wednesday. Minimum relative humidity values down in the 20 to 25 percent range with southwest winds 10 to 20 mph. ...Cody dispatch area (includes fire weather zones 275...276... 282...283...285...286...287...288...and 289)... Warming trend and dry conditions expected through Wednesday, with a very small chance for rain showers (<10%) across 286 Monday afternoon. Minimum relative humidity values down in the 15 to 25 percent range with southwest to west winds 10 to 20 mph. ...Casper dispatch area (includes fire weather zones 277...278... 279...280...281...285...289...and 300)... Warming trend and dry conditions expected through Wednesday. Minimum relative humidity values down in the 15 to 25 percent range with southwest to west winds 10 to 20 mph. ...Thunderstorms imply strong gusty and erratic winds... WYZ280-190945- Natrona County/Casper BLM- Including the cities of Casper and Midwest 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....85-90. 24 hr trend......4 degrees warmer. Min humidity........14-20 percent. 24 hr trend......4 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....West around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 10800-12800 ft agl. Smoke dispersal.....Poor to fair until 1200, then excellent. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....56-61. 24 hr trend......1 degree cooler. Max humidity........48-54 percent. 24 hr trend......14 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Northeast around 10 mph until 2400, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 10 mph until 2400, then southeast. Mixing Height.......5200-7200 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....90-95. 24 hr trend......4 degrees warmer. Min humidity........9-15 percent. 24 hr trend......4 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing Height.......2400-4400 ft agl until 1200, then 10600-12600 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Clear. Lows in the upper 50s. Southeast winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the mid 90s. Southwest winds around 10 mph. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 80s. North winds around 10 mph. .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the lower 50s. Highs in the lower 80s. Northeast winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 80s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. $$ WYZ283-190945- Upper Wind River Basin/Wind River Basin- Including the cities of Crowheart, Lander, Riverton, and Shoshoni 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....82-87. 24 hr trend......4 degrees warmer. Min humidity........14-20 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....Southwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......1400-3400 ft agl until 1200, then 8600-10600 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....54-59. 24 hr trend......1 degree warmer. Max humidity........37-43 percent. 24 hr trend......21 percent drier. Humidity recovery...Poor. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100. Winds southwest around 10 mph after 2400. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southeast 10 to 15 mph. Mixing Height.......5600-7600 ft agl until 2400, then 400-800 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....88-93. 24 hr trend......5 degrees warmer. Min humidity........9-15 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then southeast around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph until 1200, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......1400-3400 ft agl until 1200, then 7800-9800 ft agl. Smoke dispersal.....Poor until 1200, then good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Clear. Lows in the upper 50s. South winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the mid 90s. Winds generally less than 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs 84 to 89. Northeast winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the mid 80s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. $$ WYZ285-190945- South Bighorn Mountains- 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....79-84. 24 hr trend......2 degrees warmer. Min humidity........18-24 percent. 24 hr trend......4 percent drier. 20-foot winds.......West winds around 10 mph until 1500, then upslope/upvalley 5-9 mph. Gusts up to 15 mph. Ridge top winds.....West around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 8800-10800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....57-62. 24 hr trend......3 degrees warmer. Max humidity........39-45 percent. 24 hr trend......19 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then east around 10 mph. Gusts up to 15 mph. Ridge top winds.....East around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....East around 15 mph until 2400, then southeast. Mixing Height.......4000-6000 ft agl until 2400, then 200-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....83-88. 24 hr trend......5 degrees warmer. Min humidity........10-16 percent. 24 hr trend......6 percent drier. 20-foot winds.......South winds around 10 mph until 0900, then upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......3200-5200 ft agl until 1200, then 9800-11800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Clear. Lows in the lower 60s. Southeast winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the upper 80s. West winds around 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs 75 to 80. East winds around 10 mph. .SATURDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the mid 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. $$ WYZ281-190945- Johnson County/Casper BLM- Including the cities of Buffalo and Kaycee 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....81-86. 24 hr trend......1 degree warmer. Min humidity........22-28 percent. 24 hr trend......Unchanged. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 10 mph. Ridge top winds.....Southwest around 10 mph until 1200, then north. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing Height.......2000-4000 ft agl until 1200, then 9400-11400 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....60-65. 24 hr trend......2 degrees warmer. Max humidity........54-60 percent. 24 hr trend......13 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 10 mph. Ridge top winds.....Northeast around 10 mph until 2400, then southwest. Chc of wetting rain.Zero percent. Transport winds.....East around 10 mph until 2400, then south. Mixing Height.......4400-6400 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....89-94. 24 hr trend......7 degrees warmer. Min humidity........11-17 percent. 24 hr trend......8 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......2600-4600 ft agl until 1200, then 10200-12200 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the mid 60s. South winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the mid 60s. Highs in the upper 90s. Southwest winds around 10 mph. .THURSDAY...Not as warm. Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the upper 80s. North winds around 10 mph. .FRIDAY...Partly cloudy. Chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 80s. East winds around 10 mph. .SATURDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs around 80. .SUNDAY...Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. $$ WYZ282-190945- South Bighorn Basin/Worland BLM- Including the cities of Ten Sleep, Thermopolis, and Worland 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....80-85. 24 hr trend......1 degree warmer. Min humidity........14-20 percent. 24 hr trend......3 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......1200-3200 ft agl until 1200, then 8400-10400 ft agl. Smoke dispersal.....Poor until 1200, then good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....58-63. 24 hr trend......1 degree warmer. Max humidity........43-49 percent. 24 hr trend......20 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southeast 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southeast 10 to 15 mph. Mixing Height.......4600-6600 ft agl until 2400, then 400-800 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....87-92. 24 hr trend......7 degrees warmer. Min humidity........7-13 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then south around 10 mph with higher gusts. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing Height.......1800-3800 ft agl until 1200, then 8600-10600 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Clear. Lows in the lower 60s. Southeast winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the upper 90s. Winds generally less than 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the upper 50s. Highs 85 to 90. North winds around 10 mph. .SATURDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the mid 80s. .SUNDAY...Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. $$ WYZ275-190945- North Bighorn Basin/Worland BLM- Including the cities of Greybull, Lovell, and Powell 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....78-83. 24 hr trend......1 degree warmer. Min humidity........16-22 percent. 24 hr trend......2 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southeast 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......1000-3000 ft agl until 1200, then 7000-9000 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....58-63. 24 hr trend......2 degrees warmer. Max humidity........42-48 percent. 24 hr trend......21 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then southeast around 10 mph until 0300, then downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southeast around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southeast around 10 mph. Mixing Height.......3800-5800 ft agl until 2400, then 400-800 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....85-90. 24 hr trend......7 degrees warmer. Min humidity........8-14 percent. 24 hr trend......7 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southeast around 10 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......1400-3400 ft agl until 1200, then 7600-9600 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the lower 60s. Southeast winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the mid 90s. South winds around 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the upper 50s. Highs 84 to 89. North winds around 10 mph. .SATURDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 50s. Highs in the mid 80s. .SUNDAY...Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. $$ WYZ276-190945- Cody Foothills- Including the cities of Clark, Cody, and Meeteetse 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Isolated showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....79-84. 24 hr trend......2 degrees warmer. Min humidity........21-27 percent. 24 hr trend......4 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southeast around 10 mph. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2400-4400 ft agl until 1200, then 8800-10800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....58-63. 24 hr trend......3 degrees warmer. Max humidity........38-44 percent. 24 hr trend......23 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph until 2400, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......3800-5800 ft agl until 2400, then 600-1000 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....86-91. 24 hr trend......8 degrees warmer. Min humidity........11-17 percent. 24 hr trend......10 percent drier. 20-foot winds.......Southwest winds around 10 mph until 0900, then upslope/upvalley 5-9 mph until 1200, then southeast around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southwest around 10 mph until 1200, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2600-4600 ft agl until 1200, then 10000-12000 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the lower 60s. Southwest winds around 10 mph. .WEDNESDAY...Partly cloudy. Lows in the lower 60s. Highs in the lower 90s. Southwest winds around 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs 78 to 83. North winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. $$ WYZ287-190945- Owl Creek Mountains- 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Isolated showers and thunderstorms early in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....78-83. 24 hr trend......2 degrees warmer. Min humidity........15-21 percent. 24 hr trend......1 percent drier. 20-foot winds.......South winds around 10 mph and gusty. Ridge top winds.....South around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 9000-11000 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....55-60. 24 hr trend......2 degrees warmer. Max humidity........32-38 percent. 24 hr trend......21 percent drier. Humidity recovery...Poor. 20-foot winds.......Downslope/downvalley 4-7 mph until 2400, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......4400-6400 ft agl until 2400, then 200-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....82-87. 24 hr trend......5 degrees warmer. Min humidity........8-14 percent. 24 hr trend......7 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 8600-10600 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the lower 60s. Southwest winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs in the upper 80s. West winds around 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs 78 to 83. Northeast winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. $$ WYZ286-190945- Absaroka Mountains/North Shoshone NF- Including the city of Pahaska 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Isolated showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....72-77. 24 hr trend......2 degrees warmer. Min humidity........23-29 percent. 24 hr trend......7 percent drier. 20-foot winds.......Southwest winds around 10 mph with higher gusts. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 15 to 20 mph. Mixing Height.......3200-5200 ft agl until 1200, then 9800-11800 ft agl. Smoke dispersal.....Fair to good until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....51-56. 24 hr trend......5 degrees warmer. Max humidity........42-48 percent. 24 hr trend......36 percent drier. Humidity recovery...Moderate. 20-foot winds.......West winds around 10 mph with gusts to around 15 mph. Ridge top winds.....West around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......3800-5800 ft agl until 2400, then 400-1000 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....79-84. 24 hr trend......6 degrees warmer. Min humidity........12-18 percent. 24 hr trend......10 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2800-4800 ft agl until 1200, then 9200-11200 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the mid 50s. Southwest winds around 10 mph. .WEDNESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the upper 70s. West winds around 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the upper 40s. Highs 71 to 76. East winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the lower 70s. $$ WYZ140-190945- Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....73-78. 24 hr trend......3 degrees warmer. Min humidity........21-27 percent. 24 hr trend......10 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southwest 10 to 15 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 15 to 20 mph. Mixing Height.......2200-4200 ft agl until 1200, then 9600-11600 ft agl. Smoke dispersal.....Fair to good until 1200, then excellent. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....44-49. 24 hr trend......3 degrees warmer. Max humidity........52-58 percent. 24 hr trend......41 percent drier. Humidity recovery...Moderate. 20-foot winds.......Southwest winds around 10 mph until 2100, then downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph until 2400, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph until 2400, then south. Mixing Height.......4400-6400 ft agl until 2400, then 400-800 ft agl. Smoke dispersal.....Good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....80-85. 24 hr trend......6 degrees warmer. Min humidity........14-20 percent. 24 hr trend......8 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southeast around 10 mph until 1200, then southwest. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 8200-10200 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the upper 40s. Winds generally less than 10 mph. .WEDNESDAY...Partly cloudy. Lows in the upper 40s. Highs in the upper 70s. Winds generally less than 10 mph. .THURSDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the mid 70s. Winds generally less than 10 mph. .FRIDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 70s. Winds generally less than 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the upper 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. $$ WYZ415-190945- North Zone Bridger Teton NF and Grand Teton NP- Including the cities of Jackson and Moran 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....75-80. 24 hr trend......5 degrees warmer. Min humidity........19-25 percent. 24 hr trend......16 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph until 1200, then southwest. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 9400-11400 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Partly cloudy then becoming clear. Chance of thunder...0 percent. Min temperature.....45-50. 24 hr trend......3 degrees warmer. Max humidity........51-57 percent. 24 hr trend......41 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph until 2400, then east. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 2400, then southeast. Mixing Height.......4600-6600 ft agl until 2400, then 400-1000 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....79-84. 24 hr trend......6 degrees warmer. Min humidity........13-19 percent. 24 hr trend......7 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southeast around 10 mph until 1200, then southwest. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph until 1200, then southwest. Mixing Height.......2000-4000 ft agl until 1200, then 7800-9800 ft agl. Smoke dispersal.....Poor until 1200, then good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the lower 50s. Winds generally less than 10 mph. .WEDNESDAY...Partly cloudy. Lows in the lower 50s. Highs in the upper 70s. Winds generally less than 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the upper 70s. Winds generally less than 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the upper 70s. .SUNDAY...Partly cloudy. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. $$ WYZ416-190945- West Wind River Mountains/East Zone Bridger Teton NF- 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....68-73. 24 hr trend......2 degrees warmer. Min humidity........20-26 percent. 24 hr trend......10 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2600-4600 ft agl until 1200, then 8800-10800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....47-52. 24 hr trend......5 degrees warmer. Max humidity........39-45 percent. 24 hr trend......35 percent drier. Humidity recovery...Moderate. 20-foot winds.......Southwest winds around 10 mph until 2100, then downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southeast around 10 mph until 2400, then east. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph until 2400, then east. Mixing Height.......4000-6000 ft agl until 2400, then 400-800 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....73-78. 24 hr trend......5 degrees warmer. Min humidity........13-19 percent. 24 hr trend......8 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southeast around 10 mph until 1200, then southwest. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph until 1200, then southwest. Mixing Height.......2600-4600 ft agl until 1200, then 7800-9800 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows around 50. Winds generally less than 10 mph. .WEDNESDAY...Partly cloudy. Lows in the lower 50s. Highs in the upper 70s. West winds around 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the mid 70s. North winds around 10 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 70s. .SUNDAY...Partly cloudy. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs around 70. $$ WYZ288-190945- East Wind River Mountains/South Shoshone NF- Including the cities of Dubois and South Pass 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....74-79. 24 hr trend......3 degrees warmer. Min humidity........17-23 percent. 24 hr trend......9 percent drier. 20-foot winds.......Southwest winds around 10 mph with higher gusts. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......3400-5400 ft agl until 1200, then 9800-11800 ft agl. Smoke dispersal.....Fair to good until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....51-56. 24 hr trend......4 degrees warmer. Max humidity........33-39 percent. 24 hr trend......28 percent drier. Humidity recovery...Poor. 20-foot winds.......Southwest winds around 10 mph until 2100, then downslope/downvalley 4-7 mph until 2400, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......4400-6400 ft agl until 2400, then 400-800 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....77-82. 24 hr trend......5 degrees warmer. Min humidity........11-17 percent. 24 hr trend......7 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2600-4600 ft agl until 1200, then 8800-10800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the mid 50s. Southwest winds around 10 mph. .WEDNESDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 50s. Highs around 80. West winds around 10 mph. .THURSDAY THROUGH FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows around 50. Highs 73 to 78. Northeast winds around 10 mph. .SATURDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the lower 50s. Highs in the lower 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the lower 70s. $$ WYZ414-190945- Salt and Wyoming Ranges/West Zone Bridger Teton NF- Including the city of Afton 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....74-79. 24 hr trend......5 degrees warmer. Min humidity........15-21 percent. 24 hr trend......15 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......3400-5400 ft agl until 1200, then 10400-12400 ft agl. Smoke dispersal.....Fair to good until 1200, then very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....45-50. 24 hr trend......3 degrees warmer. Max humidity........46-52 percent. 24 hr trend......42 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph until 2400, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 2400, then southeast. Mixing Height.......4800-6800 ft agl until 2400, then 400-1000 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....80-85. 24 hr trend......6 degrees warmer. Min humidity........9-15 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......2200-4200 ft agl until 1200, then 8800-10800 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the mid 50s. Winds generally less than 10 mph. .WEDNESDAY...Partly cloudy with slight chance of showers. Lows in the mid 50s. Highs in the lower 80s. Winds generally less than 10 mph. .THURSDAY THROUGH FRIDAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the lower 50s. Highs around 80. Winds generally less than 10 mph. .SATURDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the lower 50s. Highs in the upper 70s. .SUNDAY...Partly cloudy. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs in the mid 70s. $$ WYZ277>279-190945- Lincoln and Uinta Counties/Lower Elevations- Upper Green River Basin/Rock Springs BLM- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Including the cities of Evanston, Fort Bridger, Kemmerer, Big Piney, Farson, Pinedale, Green River, Rock Springs, and Wamsutter 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....75-80. 24 hr trend......4 degrees warmer. Min humidity........14-20 percent. 24 hr trend......8 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southeast around 10 mph until 1200, then southwest. Mixing Height.......2200-4200 ft agl until 1200, then 10000-12000 ft agl. Smoke dispersal.....Poor until 1200, then very good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....48-53. 24 hr trend......Unchanged. Max humidity........42-48 percent. 24 hr trend......27 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....West around 10 mph until 2400, then northeast. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph until 2400, then north. Mixing Height.......5600-7600 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....80-85. 24 hr trend......5 degrees warmer. Min humidity........11-17 percent. 24 hr trend......5 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph until 1200, then southwest. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......1800-3800 ft agl until 1200, then 8600-10600 ft agl. Smoke dispersal.....Poor until 1200, then good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Clear. Lows in the lower 50s. Winds generally less than 10 mph. .WEDNESDAY...Mostly clear. Lows in the mid 50s. Highs in the upper 80s. Winds generally less than 10 mph. .THURSDAY THROUGH FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 50s. Highs 83 to 88. Winds generally less than 10 mph. .SATURDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 50s. Highs in the lower 80s. .SUNDAY...Partly cloudy. Slight chance of showers in the morning, then chance of showers and thunderstorms in the afternoon. Highs around 80. $$ WYZ289-190945- Granite/Green/Ferris/Rattlesnake Mountains- Including the city of Jeffrey City 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....79-84. 24 hr trend......3 degrees warmer. Min humidity........11-17 percent. 24 hr trend......8 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......3000-5000 ft agl until 1200, then 11200-13200 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....54-59. 24 hr trend......1 degree warmer. Max humidity........41-47 percent. 24 hr trend......21 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....West around 10 mph until 2400, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph until 2400, then east. Mixing Height.......5400-7400 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....84-89. 24 hr trend......4 degrees warmer. Min humidity........7-13 percent. 24 hr trend......4 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 10 mph until 1200, then 20 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing Height.......2400-4400 ft agl until 1200, then 10200-12200 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Clear. Lows in the mid 50s. Winds generally less than 10 mph. .WEDNESDAY...Mostly clear. Lows in the upper 50s. Highs in the lower 90s. Winds generally less than 10 mph. .THURSDAY THROUGH FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the mid 50s. Highs 81 to 86. Northeast winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the lower 80s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. $$ WYZ300-190945- Casper Mountain- 145 AM MDT Mon Aug 18 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....79-84. 24 hr trend......4 degrees warmer. Min humidity........15-21 percent. 24 hr trend......8 percent drier. 20-foot winds.......Southwest winds around 10 mph until 1200, then west. Gusts up to 20 mph. Ridge top winds.....Southwest around 15 mph until 1200, then west. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......3800-5800 ft agl until 1200, then 11200-13200 ft agl. Smoke dispersal.....Fair to good until 1200, then very good to excellent. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....57-62. 24 hr trend......3 degrees warmer. Max humidity........45-51 percent. 24 hr trend......10 percent drier. Humidity recovery...Moderate. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....East around 10 mph until 2400, then southeast. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 10 mph until 2400, then southeast. Mixing Height.......5000-7000 ft agl until 2400, then 200-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .TUESDAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....83-88. 24 hr trend......3 degrees warmer. Min humidity........13-19 percent. 24 hr trend......2 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....Southeast around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing Height.......3600-5600 ft agl until 1200, then 11200-13000 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .TUESDAY NIGHT...Mostly clear. Lows in the upper 50s. Southeast winds around 10 mph. .WEDNESDAY...Mostly clear. Lows in the upper 50s. Highs in the upper 80s. Winds generally less than 10 mph. .THURSDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 50s. Highs in the lower 80s. North winds around 10 mph. .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the lower 50s. Highs in the mid 70s. East winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 50s. Highs in the mid 70s. .SUNDAY...Partly cloudy. Chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. $$