Zone Forecast Product
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
737 FPUS55 KRIW 211048 ZFPRIW Zone Forecast Product for Western and Central Wyoming National Weather Service Riverton WY 447 AM MDT Mon Sep 21 2026 WYZ020-211200- Natrona County Lower Elevations- Including the city of Casper 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Partly cloudy. Patchy fog. Lows in the lower 40s. .MONDAY...Partly cloudy in the morning, then clearing. Areas of fog in the morning. Highs in the upper 60s. .MONDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast winds around 10 mph with gusts up to 25 mph. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. Southwest winds around 10 mph. .TUESDAY NIGHT...Partly cloudy with a chance of showers. Lows around 50. South winds 10 to 15 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny and breezy. Highs around 70. .WEDNESDAY NIGHT...Mostly clear. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs in the mid 70s. .THURSDAY NIGHT...Partly cloudy. Lows around 50. .FRIDAY...Mostly sunny and breezy. Highs in the upper 70s. .FRIDAY NIGHT...Mostly clear. Lows around 50. .SATURDAY...Mostly sunny. Highs in the mid 70s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ017-211200- Wind River Basin- Including the cities of Riverton and Shoshoni 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Patchy fog. Near steady temperature in the upper 40s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the upper 60s. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. East winds around 10 mph, becoming south after midnight. .TUESDAY...Partly cloudy in the morning, then clearing. Highs around 70. South winds around 10 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows around 50. Southwest winds 10 to 15 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny. Highs around 70. .WEDNESDAY NIGHT...Mostly clear. Lows around 50. .THURSDAY...Mostly sunny. Highs in the mid 70s. .THURSDAY NIGHT...Mostly clear. Lows around 50. .FRIDAY...Mostly sunny. Highs around 80. .FRIDAY NIGHT...Mostly clear. Lows around 50. .SATURDAY...Mostly sunny. Highs in the mid 70s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 50. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ018-211200- Lander Foothills- Including the city of Lander 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Near steady temperature in the upper 40s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the upper 60s. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. .TUESDAY...Partly cloudy in the morning, then clearing. Highs around 70. South winds around 10 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the upper 40s. Southwest winds 10 to 15 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny. Highs around 70. .WEDNESDAY NIGHT...Mostly clear. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs in the mid 70s. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 40s. .FRIDAY...Mostly sunny. Highs in the upper 70s. .FRIDAY NIGHT...Mostly clear. Lows around 50. .SATURDAY...Partly cloudy in the morning, then clearing. Highs in the upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ028-211200- Rock Springs and Green River- Including the cities of Rock Springs and Green River 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Patchy fog. Lows around 40. .MONDAY...Partly cloudy in the morning, then clearing. Areas of fog in the morning. Highs around 70. .MONDAY NIGHT...Partly cloudy. Lows in the lower 40s. .TUESDAY...Partly cloudy. Showers likely with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Southwest winds around 10 mph in the afternoon. Chance of rain 60 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 40s. Southwest winds around 10 mph in the evening. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny. Highs in the upper 60s. .WEDNESDAY NIGHT...Mostly clear. Lows in the lower 40s. .THURSDAY...Mostly sunny. Highs in the lower 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 40s. .FRIDAY...Mostly sunny. A slight chance of. Highs in the mid 70s. .FRIDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the mid 40s. .SATURDAY...Partly cloudy in the morning, then clearing. A slight chance of. Highs in the mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SUNDAY...Partly cloudy. A slight chance of. Highs in the lower 70s. $$ WYZ013-211200- Jackson Hole- Including the city of Jackson 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Clear. Areas of fog. Near steady temperature in the upper 30s. .MONDAY...Areas of fog in the morning. Sunny. Highs in the mid 60s. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of showers after midnight. Lows around 40. Chance of rain 60 percent. .WEDNESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 60s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Sunny. Highs in the lower 70s. .THURSDAY NIGHT...Mostly clear. Lows in the lower 40s. .FRIDAY...Mostly sunny. Highs around 70. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s. .SATURDAY...Partly cloudy in the morning, then clearing. Highs in the upper 60s. .SATURDAY NIGHT...Partly cloudy. A chance of rain showers after midnight. Lows in the upper 30s. Chance of rain 30 percent. .SUNDAY...Partly cloudy. A chance of rain showers in the morning, then a slight chance of rain showers and thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 30 percent. $$ WYZ003-211200- Cody Foothills- Including the cities of Clark, Cody, and Meeteetse 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Near steady temperature in the upper 40s. .MONDAY...Mostly sunny. Highs in the upper 60s. East winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows around 50. South winds around 10 mph, becoming southwest after midnight. .TUESDAY...Partly cloudy. Highs in the lower 70s. Southwest winds around 10 mph, becoming southeast in the afternoon. .TUESDAY NIGHT...Mostly cloudy with showers likely with a slight chance of thunderstorms. Lows in the lower 50s. West winds around 10 mph. Chance of rain 60 percent. .WEDNESDAY...Mostly sunny. A slight chance of. Highs around 70. .WEDNESDAY NIGHT...Mostly clear. Lows around 50. .THURSDAY...Mostly sunny. Highs in the mid 70s. .THURSDAY NIGHT...Mostly clear. Lows around 50. .FRIDAY...Mostly sunny. Highs in the upper 70s. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 50. .SATURDAY...Partly cloudy in the morning, then clearing. Highs in the lower 70s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. .SUNDAY...Partly cloudy. A slight chance of showers in the morning, then a chance of showers in the afternoon. Highs around 70. Chance of rain 30 percent. $$ WYZ004-211200- North Bighorn Basin- Including the cities of Basin, Greybull, Lovell, Powell, and Shell 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Near steady temperature in the upper 40s. .MONDAY...Partly cloudy in the morning, then clearing. Areas of fog in the morning. Highs in the lower 70s. Southeast winds around 10 mph in the afternoon. .MONDAY NIGHT...Clear. Lows in the mid 40s. Southeast winds around 10 mph in the evening. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. Southeast winds around 10 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows around 50. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 70s. .WEDNESDAY NIGHT...Clear. Lows around 50. .THURSDAY...Mostly sunny. Highs in the upper 70s. .THURSDAY NIGHT...Mostly clear. Lows around 50. .FRIDAY...Mostly sunny. Highs around 80. .FRIDAY NIGHT...Mostly clear. Lows around 50. .SATURDAY...Mostly sunny. Highs in the mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SUNDAY...Partly cloudy in the morning, then clearing. A 20 percent chance of showers. Highs in the lower 70s. $$ WYZ006-211200- Southeast Bighorn Basin- Including the cities of Ten Sleep and Worland 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Near steady temperature around 50. .MONDAY...Areas of fog in the morning. Sunny. Highs around 70. .MONDAY NIGHT...Clear. Lows in the upper 40s. Southeast winds around 10 mph. .TUESDAY...Mostly sunny. Highs in the mid 70s. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows around 50. South winds around 10 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 70s. .WEDNESDAY NIGHT...Clear. Lows around 50. .THURSDAY...Mostly sunny. Highs in the upper 70s. .THURSDAY NIGHT...Mostly clear. Lows in the lower 50s. .FRIDAY...Mostly sunny. Highs in the lower 80s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 50s. .SATURDAY...Mostly sunny. Highs in the upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ005-211200- Southwest Bighorn Basin- Including the city of Thermopolis 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Near steady temperature in the upper 40s. .MONDAY...Sunny. Highs around 70. Southeast winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the upper 40s. South winds around 10 mph in the evening. .TUESDAY...Mostly sunny. Highs in the mid 70s. Southeast winds around 10 mph in the afternoon. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows around 50. Southwest winds around 10 mph. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny. Highs in the lower 70s. .WEDNESDAY NIGHT...Clear. Lows around 50. .THURSDAY...Mostly sunny. Highs around 80. .THURSDAY NIGHT...Mostly clear. Lows in the lower 50s. .FRIDAY...Mostly sunny. Highs around 80. .FRIDAY NIGHT...Mostly clear. Lows in the lower 50s. .SATURDAY...Mostly sunny. Highs in the mid 70s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ023-211200- Star Valley- Including the cities of Afton, Alpine, Star Valley Ranch, and Thayne 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Clear. Areas of fog. Near steady temperature in the upper 30s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the upper 60s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s. .TUESDAY...Mostly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 40 percent. .TUESDAY NIGHT...Mostly cloudy with showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of showers after midnight. Lows around 40. Chance of rain 60 percent. .WEDNESDAY...Mostly sunny. Highs around 70. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Sunny. Highs in the mid 70s. .THURSDAY NIGHT...Mostly clear. Lows in the lower 40s. .FRIDAY...Mostly sunny. Highs in the lower 70s. .FRIDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the lower 40s. .SATURDAY...Partly cloudy in the morning, then clearing. Highs in the lower 70s. .SATURDAY NIGHT...Partly cloudy with a slight chance of showers. Lows in the lower 40s. Chance of rain 20 percent. .SUNDAY...Partly cloudy with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 20 percent. $$ WYZ025-211200- Upper Green River Basin Foothills- Including the city of Pinedale 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Clear. Areas of fog. Near steady temperature in the upper 30s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the lower 60s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 30s. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of rain 30 percent. .TUESDAY NIGHT...Cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain showers after midnight. Lows around 40. Chance of rain 70 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Mostly sunny. Highs around 70. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 30s. .FRIDAY...Mostly sunny. Highs around 70. .FRIDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the upper 30s. .SATURDAY...Mostly sunny. A slight chance of. Highs in the upper 60s. .SATURDAY NIGHT...Partly cloudy with a slight chance of rain showers. Lows in the upper 30s. Chance of rain 20 percent. .SUNDAY...Partly cloudy. A slight chance of rain showers in the morning, then a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 30 percent. $$ WYZ026-211200- Upper Green River Basin- Including the cities of La Barge, Big Piney, and Farson 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Lows in the upper 30s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the mid 60s. .MONDAY NIGHT...Partly cloudy. Lows around 40. .TUESDAY...Partly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Southwest winds around 10 mph in the afternoon. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain showers after midnight. Lows around 40. South winds around 10 mph in the evening. Chance of rain 60 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Mostly sunny. Highs around 70. .THURSDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 40. .FRIDAY...Mostly sunny. Highs around 70. .FRIDAY NIGHT...Mostly clear. Lows around 40. .SATURDAY...Mostly sunny. Highs around 70. .SATURDAY NIGHT...Partly cloudy. Lows around 40. .SUNDAY...Partly cloudy. A slight chance of. Highs around 70. $$ WYZ010-211200- Northeast Johnson County- Including the city of Buffalo 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly cloudy. Areas of fog. Near steady temperature around 50. .MONDAY...Mostly cloudy in the morning, then clearing. Areas of fog in the morning. Highs in the mid 60s. Southeast winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows around 50. Southeast winds 10 to 15 mph with gusts up to 25 mph. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. Southeast winds 10 to 15 mph. .TUESDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the lower 50s. Southeast winds 10 to 15 mph with gusts up to 30 mph, becoming south after midnight. Chance of rain 20 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 70s. .WEDNESDAY NIGHT...Mostly clear. Lows around 50. .THURSDAY...Mostly sunny. Highs around 80. .THURSDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 50s. .FRIDAY...Mostly sunny and breezy. Highs in the lower 80s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 50s. .SATURDAY...Mostly sunny. Highs in the mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows around 50. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ011-211200- Southeast Johnson County- Including the city of Kaycee 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly cloudy. Patchy fog. Lows in the upper 40s. .MONDAY...Mostly cloudy in the morning, then clearing. Areas of fog in the morning. Highs around 70. .MONDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast winds 10 to 15 mph, becoming south after midnight. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. South winds around 10 mph. .TUESDAY NIGHT...Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the lower 50s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 70s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 40s. .THURSDAY...Mostly sunny. Highs in the upper 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 50s. .FRIDAY...Mostly sunny and breezy. Highs in the lower 80s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 50s. .SATURDAY...Mostly sunny. Highs in the upper 70s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. $$ WYZ027-211200- South Lincoln County- Including the cities of Kemmerer and Cokeville 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Clear. Patchy fog. Near steady temperature in the lower 40s. .MONDAY...Mostly sunny in the morning, then becoming partly cloudy. Highs in the mid 60s. .MONDAY NIGHT...Partly cloudy. Lows in the lower 40s. .TUESDAY...Mostly cloudy. A chance of rain showers and thunderstorms in the afternoon. Highs in the lower 60s. Southwest winds around 10 mph in the afternoon. Chance of rain 40 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of rain showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows around 40. Southwest winds around 10 mph in the evening. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. .WEDNESDAY NIGHT...Mostly clear. Lows around 40. .THURSDAY...Mostly sunny. Highs around 70. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the lower 40s. .FRIDAY...Mostly sunny. Highs in the lower 70s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 40s. .SATURDAY...Mostly sunny. Highs around 70. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 40. .SUNDAY...Partly cloudy. A slight chance of showers and thunderstorms in the afternoon. Highs around 70. Chance of rain 20 percent. $$ WYZ016-211200- Upper Wind River Basin- Including the city of Dubois 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Patchy fog. Near steady temperature in the lower 40s. .MONDAY...Sunny. Highs in the lower 60s. Southeast winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows around 40. East winds around 10 mph, becoming northwest after midnight. .TUESDAY...Partly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Northwest winds around 10 mph, becoming south in the afternoon. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain showers after midnight. Lows in the lower 40s. West winds 10 to 15 mph. Chance of rain 60 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. .WEDNESDAY NIGHT...Mostly clear. Lows around 40. .THURSDAY...Mostly sunny. Highs around 70. .THURSDAY NIGHT...Mostly clear. Lows in the lower 40s. .FRIDAY...Mostly sunny. Highs around 70. .FRIDAY NIGHT...Mostly clear. Lows in the mid 40s. .SATURDAY...Partly cloudy in the morning, then clearing. Highs around 70. .SATURDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a slight chance of rain showers. Lows in the lower 40s. Chance of rain 20 percent. .SUNDAY...Partly cloudy in the morning, then mostly sunny with a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 30 percent. $$ WYZ001-211200- Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Near steady temperature in the mid 30s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the lower 60s. .MONDAY NIGHT...Mostly clear. Lows in the mid 30s. .TUESDAY...Partly cloudy in the morning, then becoming mostly cloudy. Highs in the lower 60s. Southwest winds around 10 mph in the afternoon. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with a chance of rain showers. Lows in the upper 30s. Chance of rain 40 percent. .WEDNESDAY...Partly cloudy in the morning, then clearing. Highs around 60. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Sunny. Highs in the mid 60s. .THURSDAY NIGHT...Mostly clear. Lows around 40. .FRIDAY...Mostly sunny. Highs in the lower 60s. .FRIDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. .SATURDAY...Mostly sunny. A slight chance of. Highs around 60. .SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers after midnight. Lows in the mid 30s. Chance of rain 20 percent. .SUNDAY...Partly cloudy with a chance of rain showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of rain 30 percent. $$ WYZ029-211200- Flaming Gorge- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Near steady temperature in the mid 40s. .MONDAY...Partly cloudy in the morning, then clearing. Highs around 70. .MONDAY NIGHT...Partly cloudy. Lows in the mid 40s. .TUESDAY...Partly cloudy. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 60s. South winds 10 to 15 mph. Gusts up to 30 mph in the afternoon. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 40s. Southwest winds 10 to 15 mph with gusts up to 25 mph in the evening. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny. Highs in the upper 60s. .WEDNESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs in the lower 70s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s. .FRIDAY...Partly cloudy in the morning, then clearing. Highs in the mid 70s. .FRIDAY NIGHT...Partly cloudy. Lows around 50. .SATURDAY...Partly cloudy in the morning, then clearing. A slight chance of. Highs in the mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows around 50. .SUNDAY...Partly cloudy. A slight chance of. Highs in the lower 70s. $$ WYZ022-211200- Casper Mountain- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Partly cloudy. Near steady temperature in the lower 40s. .MONDAY...Partly cloudy in the morning, then clearing. Highs in the lower 60s. .MONDAY NIGHT...Mostly clear. Lows in the mid 40s. Southeast winds 10 to 15 mph. .TUESDAY...Mostly sunny. Highs in the upper 60s. South winds around 10 mph, becoming southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy. Lows in the upper 40s. South winds 10 to 15 mph. Gusts up to 30 mph after midnight. .WEDNESDAY...Partly cloudy in the morning, then clearing. Breezy with highs in the mid 60s. .WEDNESDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 40s. .THURSDAY...Mostly sunny in the morning, then becoming partly cloudy. Highs in the upper 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s. .FRIDAY...Partly cloudy in the morning, then clearing. Highs around 70. .FRIDAY NIGHT...Mostly clear. Lows around 50. .SATURDAY...Mostly sunny. Highs around 70. .SATURDAY NIGHT...Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the upper 40s. Chance of rain 20 percent. .SUNDAY...Partly cloudy in the morning, then clearing. A slight chance of. Highs in the upper 60s. $$ WYZ002-211200- Absaroka Mountains- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Near steady temperature in the upper 30s. .MONDAY...Mostly sunny. Highs in the upper 50s. Southwest winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the upper 30s. South winds around 10 mph, becoming southwest after midnight. .TUESDAY...Partly cloudy. Highs in the upper 50s. Southwest winds around 10 mph. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Mostly cloudy with rain showers likely. Lows around 40. West winds 10 to 15 mph. Chance of rain 60 percent. .WEDNESDAY...Partly cloudy in the morning, then clearing. A slight chance of. Highs in the upper 50s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Mostly sunny. Highs in the lower 60s. .THURSDAY NIGHT...Mostly clear. Lows in the lower 40s. .FRIDAY...Mostly sunny and breezy. Highs in the lower 60s. .FRIDAY NIGHT...Mostly clear and breezy. Lows in the lower 40s. .SATURDAY...Partly cloudy in the morning, then mostly sunny with a slight chance of rain showers in the afternoon. Breezy with highs in the upper 50s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy with a slight chance of rain showers. Lows in the upper 30s. Chance of rain 20 percent. .SUNDAY...Partly cloudy with a chance of rain showers. A slight chance of thunderstorms in the afternoon. Breezy with highs in the mid 50s. Chance of rain 30 percent. $$ WYZ007-211200- Owl Creek and Bridger Mountains- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Near steady temperature in the upper 40s. .MONDAY...Mostly sunny. Highs in the lower 60s. South winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the upper 40s. South winds around 10 mph. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the upper 60s. South winds around 10 mph. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 40s. Southwest winds around 10 mph. Chance of rain 40 percent. .WEDNESDAY...Mostly sunny. Highs in the upper 60s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 40s. .THURSDAY...Mostly sunny. Highs in the lower 70s. .THURSDAY NIGHT...Mostly clear. Lows in the lower 50s. .FRIDAY...Mostly sunny. Highs in the mid 70s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 50s. .SATURDAY...Mostly sunny. Highs in the lower 70s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Highs around 70. $$ WYZ008-211200- Bighorn Mountains West- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Partly cloudy. Patchy fog. Near steady temperature in the lower 40s. .MONDAY...Mostly sunny. Highs in the upper 50s. Southwest winds around 10 mph in the afternoon. .MONDAY NIGHT...Clear. Lows in the mid 40s. Southeast winds around 10 mph. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 60s. South winds around 10 mph, becoming southwest in the afternoon. .TUESDAY NIGHT...Partly cloudy with a chance of rain showers with a slight chance of thunderstorms. Lows in the upper 40s. South winds around 10 mph with gusts up to 20 mph. Chance of rain 50 percent. .WEDNESDAY...Mostly sunny. A chance of rain showers in the morning. Highs in the lower 60s. Chance of rain 30 percent. .WEDNESDAY NIGHT...Clear. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs in the mid 60s. .THURSDAY NIGHT...Mostly clear. Lows around 50. .FRIDAY...Mostly sunny. Highs in the upper 60s. .FRIDAY NIGHT...Mostly clear. Lows around 50. .SATURDAY...Mostly sunny. Highs in the mid 60s. .SATURDAY NIGHT...Partly cloudy. A chance of rain showers in the evening. Lows in the mid 40s. Chance of rain 30 percent. .SUNDAY...Partly cloudy in the morning, then clearing. Highs in the mid 60s. $$ WYZ009-211200- Bighorn Mountains Southeast- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Partly cloudy. Near steady temperature in the lower 40s. Northwest winds around 10 mph. .MONDAY...Partly cloudy. Highs in the upper 50s. South winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear. Lows in the lower 40s. South winds around 10 mph, becoming west after midnight. .TUESDAY...Partly cloudy in the morning, then clearing. Highs in the mid 60s. Southwest winds around 10 mph. .TUESDAY NIGHT...A slight chance of thunderstorms in the evening. Partly cloudy with a chance of rain showers. Lows in the mid 40s. Southwest winds 10 to 15 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny with a chance of rain showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of rain 40 percent. .WEDNESDAY NIGHT...Mostly clear. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs in the mid 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s. .FRIDAY...Mostly sunny. Highs in the upper 60s. .FRIDAY NIGHT...Mostly clear. Lows in the upper 40s. .SATURDAY...Partly cloudy in the morning, then clearing. Highs in the mid 60s. .SATURDAY NIGHT...Partly cloudy. A chance of rain showers in the evening. Lows in the mid 40s. Chance of rain 30 percent. .SUNDAY...Partly cloudy in the morning, then mostly sunny with a chance of rain showers in the afternoon. Highs in the mid 60s. Chance of rain 30 percent. $$ WYZ012-211200- Teton and Gros Ventre Mountains- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Clear. Areas of fog. Near steady temperature in the mid 30s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the upper 50s. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. South winds around 10 mph, becoming southeast after midnight. .TUESDAY...Partly cloudy in the morning, then mostly cloudy with a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Southwest winds around 10 mph in the afternoon. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain showers after midnight. Lows in the upper 30s. Chance of rain 60 percent. .WEDNESDAY...Partly cloudy in the morning, then clearing. Highs in the upper 50s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Sunny. Highs in the lower 60s. .THURSDAY NIGHT...Mostly clear. Lows in the lower 40s. .FRIDAY...Mostly sunny. Highs in the lower 60s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 40s. .SATURDAY...Partly cloudy in the morning, then clearing. A slight chance of. Highs in the upper 50s. .SATURDAY NIGHT...Partly cloudy. A chance of rain showers after midnight. Lows in the upper 30s. Chance of rain 30 percent. .SUNDAY...Partly cloudy with a chance of rain showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of rain 30 percent. $$ WYZ014-211200- Wind River Mountains West- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Near steady temperature in the mid 30s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the mid 50s. Southwest winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. .TUESDAY...Partly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 50s. South winds 10 to 15 mph. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain and snow showers after midnight. Little or no snow accumulation. Lows in the upper 30s. Southwest winds around 10 mph. Chance of precipitation 70 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 50s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Mostly sunny. Highs in the upper 50s. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows around 40. .FRIDAY...Mostly sunny. Highs around 60. .FRIDAY NIGHT...Partly cloudy in the evening, then clearing. Lows around 40. .SATURDAY...Partly cloudy in the morning, then mostly sunny with a slight chance of rain showers in the afternoon. Breezy with highs in the upper 50s. Chance of rain 20 percent. .SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers and thunderstorms in the evening, then a chance of rain showers after midnight. Lows in the upper 30s. Chance of rain 30 percent. .SUNDAY...Partly cloudy. A slight chance of rain showers in the morning, then a chance of rain showers with a slight chance of thunderstorms in the afternoon. Breezy with highs in the upper 50s. Chance of rain 40 percent. $$ WYZ015-211200- Wind River Mountains East- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Patchy fog. Near steady temperature in the mid 30s. .MONDAY...Mostly sunny. Highs in the lower 50s. South winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. Southwest winds around 10 mph. .TUESDAY...Partly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Southwest winds 10 to 15 mph. Chance of rain 30 percent. .TUESDAY NIGHT...Mostly cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain and snow showers after midnight. Little or no snow accumulation. Lows in the upper 30s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of precipitation 60 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 50s. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 30s. .THURSDAY...Mostly sunny. Highs in the upper 50s. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows around 40. .FRIDAY...Mostly sunny and breezy. Highs in the upper 50s. .FRIDAY NIGHT...Mostly clear and breezy. Lows in the lower 40s. .SATURDAY...Partly cloudy in the morning, then clearing. A slight chance of. Breezy with highs in the upper 50s. .SATURDAY NIGHT...Partly cloudy. A slight chance of rain showers and thunderstorms in the evening, then a chance of rain showers after midnight. Lows in the upper 30s. Chance of rain 30 percent. .SUNDAY...Partly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Breezy with highs in the mid 50s. Chance of rain 40 percent. $$ WYZ019-211200- Green Mountains and Rattlesnake Range- Including the city of Jeffrey City 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Patchy fog. Near steady temperature in the mid 40s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the mid 60s. Southwest winds around 10 mph in the afternoon. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s. .TUESDAY...Mostly sunny. Highs in the upper 60s. South winds 10 to 15 mph. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 40s. Southwest winds 10 to 15 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny. Highs in the upper 60s. .WEDNESDAY NIGHT...Mostly clear. Lows in the mid 40s. .THURSDAY...Mostly sunny. Highs around 70. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s. .FRIDAY...Mostly sunny. Highs in the lower 70s. .FRIDAY NIGHT...Mostly clear. Lows in the upper 40s. .SATURDAY...Partly cloudy in the morning, then clearing. Breezy with highs in the lower 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SUNDAY...Partly cloudy in the morning, then clearing. Breezy with highs in the lower 70s. $$ WYZ024-211200- Salt River and Wyoming Ranges- 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Clear. Near steady temperature in the upper 30s. .MONDAY...Mostly sunny. Highs in the lower 60s. Southwest winds around 10 mph in the afternoon. .MONDAY NIGHT...Partly cloudy. Lows in the lower 40s. Southwest winds around 10 mph in the evening. .TUESDAY...Mostly cloudy. A chance of rain showers and thunderstorms in the afternoon. Highs in the upper 50s. Southwest winds around 10 mph in the afternoon. Chance of rain 40 percent. .TUESDAY NIGHT...Mostly cloudy with rain showers likely with a slight chance of thunderstorms in the evening, then partly cloudy with a chance of rain showers after midnight. Lows in the upper 30s. Southwest winds around 10 mph in the evening. Chance of rain 60 percent. .WEDNESDAY...Mostly sunny. Highs in the lower 60s. .WEDNESDAY NIGHT...Mostly clear. Lows around 40. .THURSDAY...Mostly sunny. Highs in the mid 60s. .THURSDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the lower 40s. .FRIDAY...Mostly sunny. Highs in the mid 60s. .FRIDAY NIGHT...Mostly clear. Lows in the lower 40s. .SATURDAY...Mostly sunny. Highs in the lower 60s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s. .SUNDAY...Partly cloudy. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of rain 30 percent. $$ WYZ030-211200- East Sweetwater County- Including the city of Wamsutter 447 AM MDT Mon Sep 21 2026 .REST OF TONIGHT...Mostly clear. Areas of fog. Near steady temperature in the mid 40s. .MONDAY...Areas of fog in the morning. Mostly sunny. Highs in the upper 60s. .MONDAY NIGHT...Partly cloudy. Lows in the lower 40s. .TUESDAY...Mostly sunny in the morning, then becoming partly cloudy. Breezy with highs in the upper 60s. South winds around 10 mph, becoming southwest 15 to 20 mph with gusts up to 30 mph in the afternoon. .TUESDAY NIGHT...Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 40s. Southwest winds 10 to 15 mph. Chance of rain 30 percent. .WEDNESDAY...Mostly sunny. Highs in the mid 60s. .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 40s. .THURSDAY...Partly cloudy. Highs around 70. .THURSDAY NIGHT...Partly cloudy. Lows in the mid 40s. .FRIDAY...Partly cloudy in the morning, then clearing. Highs in the lower 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SATURDAY...Partly cloudy in the morning, then clearing. Highs in the lower 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s. .SUNDAY...Partly cloudy in the morning, then clearing. A slight chance of. Highs around 70. $$