


Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Boise, ID
Issued by NWS Boise, ID
754 FNUS55 KBOI 211420 FWFBOI Fire Weather Planning Forecast for SW Idaho and SE Oregon National Weather Service Boise ID 820 AM MDT Wed May 21 2025 ...MILD AND DRY TODAY... ...A CHANCE OF SHOWERS AND THUNDERSTORMS THURSDAY AND FRIDAY... .DISCUSSION... High pressure will bring mild and dry conditions to the region today. Weak flow aloft will result in lighter surface winds. A pair of low pressure systems will swing through the region Thursday and Friday bringing periods of showers and afternoon thunderstorms while increasing daytime winds. Showers and thunderstorms will focus across northern zones on Thursday, with the focus shifting to southern zones on Friday. The weekend will be warm and dry with the chance of showers and thunderstorms returning early next week. IDZ401-402-212315- Western Payette National Forest-Eastern Payette National Forest- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....46 to 61. 24 hr trend......On average, 7 degrees warmer. Min humidity........23 to 33 percent. 24 hr trend......On average, 18 percent drier. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph in the morning, becoming southwest around 8 mph in the afternoon. Ridges/upr slopes....Light winds less than 8 mph in the morning, becoming southwest 8 to 9 mph in the afternoon. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......3500-5500 ft AGL. Transport Winds....Southwest 5 to 10 mph. .TONIGHT... Sky/weather.........Mostly cloudy. A 20 percent chance of rain and snow showers after midnight. Chance of thunder...0 percent. Min temperature.....35 to 47. 24 hr trend......On average, 10 degrees warmer. Max humidity........57 to 75 percent. 24 hr trend......On average, 21 percent drier. 20-foot winds....... Valleys/lwr slopes...Light downslope winds less than 8 mph. Ridges/upr slopes....Southwest around 8 mph in the evening, becoming light after midnight. CWR /0.10 inch/.....10 percent. Smoke Dispersal: Mixing Height......100-600 ft AGL. Transport Winds....Southeast 5 to 10 mph. .THURSDAY... Sky/weather.........A chance of rain and snow showers in the morning, then rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 80 percent. Chance of thunder...20 percent. Max temperature.....47 to 62. 24 hr trend......On average, unchanged. Min humidity........38 to 58 percent. 24 hr trend......On average, 15 percent wetter. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph in the morning, becoming southwest 8 to 11 mph with gusts to 18 mph in the afternoon. Ridges/upr slopes....South 8 to 13 mph. Gusts to 20 mph in the afternoon. CWR /0.10 inch/.....40 percent. Smoke Dispersal: Mixing Height......3500-5500 ft AGL. Transport Winds....Southwest 10 to 20 mph. $$ = IDZ403-212315- Northern Boise National Forest- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....46 to 61. 24 hr trend......On average, 6 degrees warmer. Min humidity........22 to 32 percent. 24 hr trend......On average, 14 percent drier. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph in the morning, becoming southwest around 8 mph in the afternoon. Ridges/upr slopes....Light winds less than 8 mph in the morning, becoming southwest 8 to 10 mph in the afternoon. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......4000-6000 ft AGL. Transport Winds....Southwest 5 to 15 mph. .TONIGHT... Sky/weather.........Mostly cloudy. A 20 percent chance of rain and snow showers after midnight. Chance of thunder...0 percent. Min temperature.....35 to 45. 24 hr trend......On average, 10 degrees warmer. Max humidity........55 to 72 percent. 24 hr trend......On average, 20 percent drier. 20-foot winds....... Valleys/lwr slopes...Southwest around 8 mph in the evening, becoming light downslope less than 8 mph after midnight. Ridges/upr slopes....Southwest 8 to 9 mph in the evening, becoming light after midnight. CWR /0.10 inch/.....10 percent. Smoke Dispersal: Mixing Height......100-600 ft AGL. Transport Winds....Southeast 5 to 10 mph. .THURSDAY... Sky/weather.........Mostly cloudy. A chance of rain and snow showers in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 60 percent. Chance of thunder...20 percent. Max temperature.....50 to 65. 24 hr trend......On average, 3 degrees warmer. Min humidity........33 to 48 percent. 24 hr trend......On average, 13 percent wetter. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph in the morning, becoming southwest 8 to 11 mph with gusts to 20 mph in the afternoon. Ridges/upr slopes....South 8 to 14 mph. Gusts to 22 mph in the afternoon. CWR /0.10 inch/.....30 percent. Smoke Dispersal: Mixing Height......5000-7000 ft AGL. Transport Winds....Southwest 15 to 20 mph. $$ = IDZ421-212315- Southern Boise/Western Sawtooth NF, including the Camas Prairie- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....54 to 64, except 45 to 54 above 6500 feet. 24 hr trend......On average, 5 degrees warmer. Min humidity........20 to 30 percent. 24 hr trend......On average, 10 percent drier. 20-foot winds....... Valleys/lwr slopes...West 8 to 11 mph with gusts to 18 mph. Ridges/upr slopes....West 8 to 11 mph with gusts to 16 mph. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......3500-4500 ft AGL. Transport Winds....West 5 to 15 mph. .TONIGHT... Sky/weather.........Mostly cloudy. Chance of thunder...0 percent. Min temperature.....35 to 46. 24 hr trend......On average, 9 degrees warmer. Max humidity........50 to 69 percent. 24 hr trend......On average, 16 percent drier. 20-foot winds....... Valleys/lwr slopes...Northwest 8 to 9 mph with gusts to 16 mph in the evening, shifting to east around 8 mph after midnight. Ridges/upr slopes....Light winds less than 8 mph in the evening, becoming southeast 8 to 10 mph after midnight. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......100-600 ft AGL. Transport Winds....East 5 to 10 mph. .THURSDAY... Sky/weather.........Partly cloudy with a chance of rain showers. A chance of snow showers in the morning, then a slight chance of thunderstorms in the afternoon. Chance of precipitation 30 percent. Chance of thunder...20 percent. Max temperature.....59 to 70, except 50 to 60 above 6500 feet. 24 hr trend......On average, 5 degrees warmer. Min humidity........27 to 37 percent, except 34 to 49 percent above 6500 feet. 24 hr trend......On average, 10 percent wetter. 20-foot winds....... Valleys/lwr slopes...Southeast 8 to 11 mph with gusts to 18 mph in the morning, shifting to southwest 10 to 16 mph with gusts to 28 mph in the afternoon. Ridges/upr slopes....Southeast 8 to 12 mph in the morning, shifting to southwest 8 to 14 mph with gusts to 24 mph in the afternoon. CWR /0.10 inch/.....20 percent. Smoke Dispersal: Mixing Height......5000-7000 ft AGL. Transport Winds....Southwest 10 to 15 mph. $$ = IDZ400-212315- Northern Boise BLM- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....59 to 70. 24 hr trend......On average, 4 degrees warmer. Min humidity........21 to 30 percent. 24 hr trend......On average, 6 percent drier. 20-foot winds....... Valleys/lwr slopes...Northwest around 8 mph in the morning, becoming light upslope less than 8 mph in the afternoon. Ridges/upr slopes....North 8 to 10 mph in the morning, becoming light in the afternoon. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......4500-6000 ft AGL. Transport Winds....Southwest up to 5 mph. .TONIGHT... Sky/weather.........Mostly cloudy. A 20 percent chance of rain showers after midnight. Chance of thunder...0 percent. Min temperature.....46 to 52. 24 hr trend......On average, 10 degrees warmer. Max humidity........54 to 66 percent. 24 hr trend......On average, 18 percent drier. 20-foot winds....... Valleys/lwr slopes...Light downslope winds less than 8 mph. Ridges/upr slopes....Light winds less than 8 mph. CWR /0.10 inch/.....10 percent. Smoke Dispersal: Mixing Height......100-600 ft AGL. Transport Winds....Northeast 5 to 10 mph. .THURSDAY... Sky/weather.........Mostly cloudy. A slight chance of rain showers in the morning, then a chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Chance of thunder...20 percent. Max temperature.....62 to 74. 24 hr trend......On average, 3 degrees warmer. Min humidity........31 to 39 percent. 24 hr trend......On average, 10 percent wetter. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph in the morning, becoming west around 8 mph with gusts to 16 mph in the afternoon. Ridges/upr slopes....Light winds less than 8 mph in the morning, becoming west 8 to 9 mph with gusts to 16 mph in the afternoon. CWR /0.10 inch/.....20 percent. Smoke Dispersal: Mixing Height......5000-6500 ft AGL. Transport Winds....West around 10 mph. $$ = IDZ420-424-212315- Treasure Valley BLM-Western Twin Falls BLM- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....64 to 71. 24 hr trend......On average, 5 degrees warmer. Min humidity........18 to 28 percent. 24 hr trend......On average, 6 percent drier. 20-foot winds....... Valleys/lwr slopes...Northwest around 10 mph. Ridges/upr slopes....West 8 to 11 mph with gusts to 18 mph. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......4500-5500 ft AGL. Transport Winds....West up to 10 mph. .TONIGHT... Sky/weather.........Mostly cloudy. Chance of thunder...0 percent. Min temperature.....44 to 50. 24 hr trend......On average, 8 degrees warmer. Max humidity........47 to 65 percent. 24 hr trend......On average, 18 percent drier. 20-foot winds....... Valleys/lwr slopes...East 8 to 11 mph. Ridges/upr slopes....East 8 to 11 mph. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......200-300 ft AGL. Transport Winds....East 5 to 15 mph. .THURSDAY... Sky/weather.........Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Chance of thunder...10 percent. Max temperature.....71 to 78. 24 hr trend......On average, 6 degrees warmer. Min humidity........22 to 32 percent. 24 hr trend......On average, 5 percent wetter. 20-foot winds....... Valleys/lwr slopes...East 8 to 14 mph in the morning, shifting to west 12 to 18 mph with gusts to 28 mph in the afternoon. Ridges/upr slopes....East 8 to 12 mph in the morning, shifting to southwest 10 to 16 mph with gusts to 28 mph in the afternoon. CWR /0.10 inch/.....10 percent. Smoke Dispersal: Mixing Height......6000-8000 ft AGL. Transport Winds....West 10 to 15 mph. $$ = IDZ423-426-212315- Owyhee Mountains-Southern Highlands- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....61 to 70. 24 hr trend......On average, 6 degrees warmer. Min humidity........16 to 26 percent. 24 hr trend......On average, 5 percent drier. 20-foot winds....... Valleys/lwr slopes...Northwest 8 to 9 mph in the morning, becoming light upslope less than 8 mph in the afternoon. Ridges/upr slopes....Light winds less than 8 mph. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......4500-6500 ft AGL. Transport Winds....Southwest 5 to 10 mph. .TONIGHT... Sky/weather.........Partly cloudy in the evening, then becoming mostly cloudy after midnight. Chance of thunder...0 percent. Min temperature.....41 to 48. 24 hr trend......On average, 9 degrees warmer. Max humidity........54 to 70 percent. 24 hr trend......On average, 14 percent drier. 20-foot winds....... Valleys/lwr slopes...Light downslope winds less than 8 mph in the evening, becoming southeast 8 to 10 mph after midnight. Ridges/upr slopes....East around 10 mph. CWR /0.10 inch/.....0 percent. Smoke Dispersal: Mixing Height......100-200 ft AGL. Transport Winds....South 5 to 10 mph. .THURSDAY... Sky/weather.........Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Chance of thunder...10 percent. Max temperature.....65 to 78. 24 hr trend......On average, 4 degrees warmer. Min humidity........18 to 28 percent. 24 hr trend......On average, unchanged. 20-foot winds....... Valleys/lwr slopes...West 12 to 18 mph with gusts to 30 mph. Ridges/upr slopes....West 12 to 18 mph. Gusts to 22 mph in the morning, increasing to 28 mph in the afternoon. CWR /0.10 inch/.....10 percent. Smoke Dispersal: Mixing Height......6500-8500 ft AGL. Transport Winds....West 15 to 20 mph. $$ = ORZ672-212315- Southern Grasslands- 720 AM PDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....64 to 71. 24 hr trend......On average, 5 degrees warmer. Min humidity........16 to 26 percent. 24 hr trend......On average, 3 percent drier. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph. Ridges/upr slopes....Light winds less than 8 mph. CWR /0.10 inch/.....0 percent. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....41 to 47. 24 hr trend......On average, 10 degrees warmer. Max humidity........52 to 75 percent. 24 hr trend......On average, 13 percent drier. 20-foot winds....... Valleys/lwr slopes...East around 10 mph. Ridges/upr slopes....South 8 to 9 mph in the evening, becoming 8 to 10 mph after midnight. CWR /0.10 inch/.....0 percent. .THURSDAY... Sky/weather.........Partly cloudy. A 20 percent chance of rain showers in the afternoon. Chance of thunder...0 percent. Max temperature.....65 to 73. 24 hr trend......On average, 2 degrees warmer. Min humidity........21 to 31 percent. 24 hr trend......On average, 6 percent wetter. 20-foot winds....... Valleys/lwr slopes...West 11 to 17 mph with gusts to 24 mph. Ridges/upr slopes....West 12 to 18 mph. CWR /0.10 inch/.....10 percent. $$ = ORZ673-212315- Central Canyonlands- 820 AM MDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....63 to 72. 24 hr trend......On average, 5 degrees warmer. Min humidity........24 to 33 percent. 24 hr trend......On average, unchanged. 20-foot winds....... Valleys/lwr slopes...Northwest around 8 mph in the morning, shifting to southeast in the afternoon. Ridges/upr slopes....North around 8 mph in the morning, shifting to south in the afternoon. CWR /0.10 inch/.....0 percent. .TONIGHT... Sky/weather.........Mostly cloudy. Chance of thunder...0 percent. Min temperature.....43 to 50. 24 hr trend......On average, 8 degrees warmer. Max humidity........55 to 67 percent. 24 hr trend......On average, 13 percent drier. 20-foot winds....... Valleys/lwr slopes...East around 8 mph in the evening, becoming light downslope less than 8 mph after midnight. Ridges/upr slopes....East 8 to 9 mph in the evening, becoming light after midnight. CWR /0.10 inch/.....0 percent. .THURSDAY... Sky/weather.........Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Chance of thunder...20 percent. Max temperature.....64 to 74. 24 hr trend......On average, 2 degrees warmer. Min humidity........28 to 37 percent. 24 hr trend......On average, 3 percent wetter. 20-foot winds....... Valleys/lwr slopes...West 10 to 16 mph. Ridges/upr slopes....West 10 to 16 mph. CWR /0.10 inch/.....10 percent. $$ = ORZ674-212315- Northwestern Vale BLM- 720 AM PDT Wed May 21 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....58 to 69. 24 hr trend......On average, 6 degrees warmer. Min humidity........23 to 33 percent. 24 hr trend......On average, 4 percent drier. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph. Ridges/upr slopes....North around 8 mph in the morning, shifting to south in the afternoon. CWR /0.10 inch/.....0 percent. .TONIGHT... Sky/weather.........Mostly cloudy. A 20 percent chance of rain showers after midnight. Chance of thunder...0 percent. Min temperature.....42 to 48. 24 hr trend......On average, 10 degrees warmer. Max humidity........59 to 71 percent. 24 hr trend......On average, 15 percent drier. 20-foot winds....... Valleys/lwr slopes...East 8 to 9 mph in the evening, becoming light downslope less than 8 mph after midnight. Ridges/upr slopes....Southeast around 9 mph. CWR /0.10 inch/.....10 percent. .THURSDAY... Sky/weather.........Partly cloudy. A slight chance of rain showers in the morning, then a chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...10 percent. Max temperature.....58 to 69. 24 hr trend......On average, unchanged. Min humidity........29 to 44 percent. 24 hr trend......On average, 8 percent wetter. 20-foot winds....... Valleys/lwr slopes...West 10 to 16 mph. Ridges/upr slopes....West 10 to 16 mph. CWR /0.10 inch/.....20 percent. $$ = ORZ675-212315- Baker Valley- 720 AM PDT Wed May 21 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....60 to 67. 24 hr trend......On average, 7 degrees warmer. Min humidity........24 to 32 percent. 24 hr trend......On average, 9 percent drier. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph. Ridges/upr slopes....Light winds less than 8 mph in the morning, becoming south around 8 mph in the afternoon. CWR /0.10 inch/.....0 percent. .TONIGHT... Sky/weather.........Mostly cloudy. A 30 percent chance of rain showers after midnight. Chance of thunder...0 percent. Min temperature.....39 to 47. 24 hr trend......On average, 10 degrees warmer. Max humidity........65 to 80 percent. 24 hr trend......On average, 14 percent drier. 20-foot winds....... Valleys/lwr slopes...Light downslope winds less than 8 mph. Ridges/upr slopes....Southeast 8 to 9 mph in the evening, becoming light after midnight. CWR /0.10 inch/.....10 percent. .THURSDAY... Sky/weather.........Mostly cloudy. A chance of rain showers in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 60 percent. Chance of thunder...20 percent. Max temperature.....59 to 65. 24 hr trend......On average, unchanged. Min humidity........37 to 45 percent. 24 hr trend......On average, 15 percent wetter. 20-foot winds....... Valleys/lwr slopes...Northwest 8 to 12 mph. Gusts to 20 mph in the afternoon. Ridges/upr slopes....Northwest 8 to 12 mph. CWR /0.10 inch/.....30 percent. $$ = ORZ671-212315- Steens Mountain- 720 AM PDT Wed May 21 2025 .TODAY... Sky/weather.........Sunny. Chance of thunder...0 percent. Max temperature.....56 to 65. 24 hr trend......On average, 7 degrees warmer. Min humidity........23 to 33 percent. 24 hr trend......On average, 4 percent drier. 20-foot winds....... Valleys/lwr slopes...Northeast 8 to 9 mph in the morning, becoming light upslope less than 8 mph in the afternoon. Ridges/upr slopes....East 8 to 9 mph in the morning, becoming light in the afternoon. CWR /0.10 inch/.....0 percent. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....39 to 47. 24 hr trend......On average, 10 degrees warmer. Max humidity........55 to 70 percent. 24 hr trend......On average, 8 percent drier. 20-foot winds....... Valleys/lwr slopes...South around 10 mph. Ridges/upr slopes....South around 10 mph. CWR /0.10 inch/.....0 percent. .THURSDAY... Sky/weather.........Partly cloudy. A 20 percent chance of rain showers in the afternoon. Chance of thunder...0 percent. Max temperature.....56 to 65. 24 hr trend......On average, unchanged. Min humidity........26 to 40 percent. 24 hr trend......On average, 7 percent wetter. 20-foot winds....... Valleys/lwr slopes...West 10 to 16 mph with gusts to 22 mph. Ridges/upr slopes....West 10 to 16 mph with gusts to 24 mph. CWR /0.10 inch/.....10 percent. $$ = ORZ670-212315- Burns BLM- 720 AM PDT Wed May 21 2025 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....64 to 71. 24 hr trend......On average, 7 degrees warmer. Min humidity........17 to 25 percent. 24 hr trend......On average, 3 percent drier. 20-foot winds....... Valleys/lwr slopes...Light upslope winds less than 8 mph. Ridges/upr slopes....Light winds less than 8 mph in the morning, becoming south 8 to 9 mph in the afternoon. Gusts to 20 mph. CWR /0.10 inch/.....0 percent. .TONIGHT... Sky/weather.........Mostly cloudy in the evening, then partly cloudy with a 20 percent chance of rain showers after midnight. Chance of thunder...0 percent. Min temperature.....40 to 45. 24 hr trend......On average, 9 degrees warmer. Max humidity........62 to 80 percent. 24 hr trend......On average, 11 percent drier. 20-foot winds....... Valleys/lwr slopes...East around 8 mph in the evening, becoming light downslope less than 8 mph after midnight. Ridges/upr slopes....South around 10 mph with gusts to 20 mph. CWR /0.10 inch/.....10 percent. .THURSDAY... Sky/weather.........Partly cloudy. A 20 percent chance of rain showers in the afternoon. Chance of thunder...0 percent. Max temperature.....62 to 68. 24 hr trend......On average, 2 degrees cooler. Min humidity........24 to 33 percent. 24 hr trend......On average, 7 percent wetter. 20-foot winds....... Valleys/lwr slopes...West 10 to 16 mph. Ridges/upr slopes....West 11 to 17 mph with gusts to 26 mph. CWR /0.10 inch/.....10 percent. $$ = .FORECAST DAYS 3 THROUGH 7... .FRIDAY...Partly cloudy. A chance of showers and a slight chance of thunderstorms. Chance of precipitation 40 percent. Lows 35 to 46. Highs 58 to 73. Northwest winds 10 to 15 mph with gusts to 25 mph. .SATURDAY...Partly cloudy. A 20 percent chance of showers and thunderstorms. Lows 36 to 47. Highs 62 to 77. Northwest winds 10 to 15 mph. .SUNDAY...Mostly clear. Lows 40 to 50. Highs 69 to 84. East winds up to 10 mph with gusts to 20 mph. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms. Lows 45 to 56. Highs 73 to 88. .TUESDAY...Partly cloudy. A 20 percent chance of showers and thunderstorms. Lows 47 to 57. Highs 72 to 87. $$ =