FNUS55 KPIH 240833 FWFPIH Fire Weather Planning Forecast for Southeast Idaho National Weather Service Pocatello ID 233 AM MDT Mon Aug 24 2026 .DISCUSSION... * Central Idaho Dispatch Area weather impact summary (Zones 475 and 476)... High pressure will build back into the area through Wednesday, producing a warming and drying trend during the period. The high will also mean weaker wind than what occurred Sunday. Thunderstorms will continue each day this coming week, but remain at isolated coverage, and significantly decrease in coverage starting Friday. A weak dry cold front will increase the wind starting Thursday, so could be some critical fire weather conditions starting then and continuing through Saturday. * East Idaho Dispatch Area weather impact summary (Zones 410...411 and 413)... High pressure is building into central and southern Idaho, but it will still allow moist and unstable air into the region. Today, the air is so unstable that the southern three-quarters of the Dispatch area is under a marginal threat of severe thunderstorms, as it was yesterday. This high will bring weak warming and some drying, but wind will be much less than it was on Sunday, except near thunderstorms. An approaching low will increase wind again starting Thursday. * South Central Idaho Dispatch Area weather impact summary (Zones 422...425 and 427)... High pressure is building into central and southern Idaho, but it will still allow moist and unstable air into the region. Today, the air is so unstable that the southern half of the Dispatch area is under a marginal threat of severe thunderstorms, as it was yesterday. This high will bring weak warming and some drying, but wind will continue to be light, except near thunderstorms. An approaching low will increase wind again starting Thursday. IDZ475-242245- East Salmon River Mountains/Salmon NF- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy. Patchy smoke in the morning. * Chc of thunder.....Zero. * Max Temperature....76-83 valleys. 67-74 ridges. 24 hr trend......2 degrees up. * Min Humidity.......16-23 percent. 24 hr trend......3 percent up. * 20ft wind.......... Valleys/lwr slopes...Southwest 2 to 9 mph. Ridges/upr slopes....West 4 to 9 mph. Gusts up to 20 mph in the afternoon. * Chc Wetting Rain...Zero. * Mixing Height......8500-9500 ft AGL. * Transport Wind.....Becoming southwest 15 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. Patchy smoke. * Chc of thunder.....Zero. * Min Temperature....50-57. 24 hr trend......3 degrees up. * Max Humidity.......70-78 percent valleys. 78-86 percent ridges. 24 hr trend......15 percent up. * 20ft wind.......... Valleys/lwr slopes...Northwest 2 to 8 mph shifting to the south 2 to 6 mph after midnight. Ridges/upr slopes....West 3 to 9 mph with gusts to 15 mph shifting to the southwest 2 to 7 mph after midnight. * Chc Wetting Rain...Zero. * Mixing Height......1000-2000 ft AGL. * Transport Wind.....Southwest 10 mph in the evening. .TUESDAY... * Sky/weather........Mostly sunny then becoming partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....78-85 valleys. 68-75 ridges. 24 hr trend......2 degrees up. * Min Humidity.......19-27 percent. 24 hr trend......4 percent up. * 20ft wind.......... Valleys/lwr slopes...South 1 to 5 mph shifting to the southwest 3 to 9 mph in the afternoon. Ridges/upr slopes....Southwest 4 to 9 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......12250-13250 ft AGL. * Transport Wind.....South 10 mph increasing to southwest 25 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 50 to 57. Highs 74 to 81. South wind 5 to 10 mph with gusts to 20 mph. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 50 to 57. Highs 72 to 79. South wind 10 to 15 mph with gusts to 30 mph. .FRIDAY...Partly cloudy. Lows 47 to 54. Highs 70 to 77. Southwest winds 10 to 15 mph with gusts to 25 mph. .SATURDAY...Mostly clear. Slight chance of rain. Lows around 50. Highs around 70. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ476-242245- Lemhi and Lost River Range/Challis NF- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....77-84 valleys. 66-73 ridges. 24 hr trend......Little change. * Min Humidity.......16-24 percent valleys. 22-30 percent ridges. 24 hr trend......Little change. * 20ft wind.......... Valleys/lwr slopes...Southwest 4 to 9 mph. Ridges/upr slopes....Southwest 5 to 10 mph with gusts to 20 mph. * Chc Wetting Rain...10 percent. * Mixing Height......10500-11500 ft AGL. * Transport Wind.....Becoming southwest 15 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Slight chance of showers and thunderstorms in the evening. * Chc of thunder.....20 percent. * Min Temperature....48-55. 24 hr trend......2 degrees up. * Max Humidity.......67-75 percent valleys. 73-81 percent ridges. 24 hr trend......12 percent up. * 20ft wind.......... Valleys/lwr slopes...South 2 to 9 mph. Ridges/upr slopes....South 2 to 9 mph with gusts to 15 mph. * Chc Wetting Rain...10 percent. * Mixing Height......1250-2250 ft AGL. * Transport Wind.....South 10 mph in the evening. .TUESDAY... * Sky/weather........Mostly sunny then becoming mostly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....78-85 valleys. 67-74 ridges. 24 hr trend......Little change. * Min Humidity.......19-27 percent valleys. 25-33 percent ridges. 24 hr trend......3 percent up. * 20ft wind.......... Valleys/lwr slopes...Becoming southwest 2 to 8 mph in the afternoon. Ridges/upr slopes....Southwest 4 to 9 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......12250-13250 ft AGL. * Transport Wind.....South 10 mph increasing to southwest 25 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly cloudy. Chance of showers and thunderstorms. Lows 49 to 56. Highs 72 to 79. Southwest wind 5 to 10 mph with gusts to 20 mph. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 49 to 56. Highs 72 to 79. South wind 10 to 20 mph with gusts to 30 mph. .FRIDAY...Partly cloudy. Lows 47 to 54. Highs 70 to 77. Southwest winds 10 to 20 mph with gusts to 30 mph. .SATURDAY...Partly cloudy with slight chance of rain. Lows in the upper 40s. Highs in the lower 70s. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ422-242245- Sawtooth Range/Northern Sawtooth NF- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....10 percent. * Max Temperature....78-85 valleys. 67-74 ridges. 24 hr trend......2 degrees up. * Min Humidity.......18-25 percent valleys. 23-31 percent ridges. 24 hr trend......2 percent up. * 20ft wind.......... Valleys/lwr slopes...Southwest 5 to 10 mph. Ridges/upr slopes....Southwest 5 to 10 mph with gusts to 20 mph. * Chc Wetting Rain...Zero. * Mixing Height......11250-12250 ft AGL. * Transport Wind.....Becoming southwest 15 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. Patchy smoke in the evening. Slight chance of rain showers in the evening. * Chc of thunder.....Zero. * Min Temperature....49-56. 24 hr trend......Little change. * Max Humidity.......74-82 percent. 24 hr trend......18 percent up. * 20ft wind.......... Valleys/lwr slopes...Southwest 4 to 10 mph shifting to the northeast 2 to 7 mph after midnight. Ridges/upr slopes....Southwest 2 to 9 mph with gusts to 15 mph. * Chc Wetting Rain...Zero. * Mixing Height......1250-2250 ft AGL. * Transport Wind.....South 10 mph in the evening. .TUESDAY... * Sky/weather........Mostly sunny then becoming partly cloudy. * Chc of thunder.....Zero. * Max Temperature....80-87 valleys. 67-74 ridges. 24 hr trend......Little change. * Min Humidity.......17-25 percent valleys. 24-32 percent ridges. 24 hr trend......Little change. * 20ft wind.......... Valleys/lwr slopes...East 2 to 6 mph shifting to the southwest 4 to 9 mph in the afternoon. Ridges/upr slopes....Southwest 4 to 9 mph with gusts to 15 mph. * Chc Wetting Rain...Zero. * Mixing Height......12000-13000 ft AGL. * Transport Wind.....Southeast 10 mph increasing to southwest 25 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 50 to 57. Highs 74 to 81. South wind 5 to 10 mph with gusts to 20 mph. .THURSDAY...Partly cloudy. Lows 50 to 57. Highs 73 to 80. South winds 10 to 20 mph with gusts to 30 mph. .FRIDAY...Partly cloudy. Lows 48 to 55. Highs 69 to 76. Southwest winds 10 to 20 mph with gusts to 30 mph. .SATURDAY...Partly cloudy. Slight chance of rain. Lows in the upper 40s. Highs in the lower 70s. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ425-242245- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....10 percent. * Max Temperature....Around 90. 24 hr trend......Little change. * Min Humidity.......22-30 percent. 24 hr trend......2 percent up. * 20ft wind..........East 2 to 6 mph shifting to the southwest 4 to 9 mph with gusts to 20 mph in the afternoon. * Chc Wetting Rain...Zero. * Mixing Height......12000-13000 ft AGL. * Transport Wind.....East 10 mph shifting to the southwest in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Slight chance of showers and thunderstorms in the evening. * Chc of thunder.....20 percent. * Min Temperature....Around 57. 24 hr trend......2 degrees down. * Max Humidity.......72-80 percent. 24 hr trend......4 percent up. * 20ft wind..........South 4 to 9 mph with gusts to 20 mph shifting to the northeast 2 to 7 mph after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......1250-2250 ft AGL. * Transport Wind.....South 15 mph shifting to the east after midnight. .TUESDAY... * Sky/weather........Mostly sunny. Slight chance of rain showers in the afternoon. * Chc of thunder.....Zero. * Max Temperature....Around 91. 24 hr trend......Little change. * Min Humidity.......20-28 percent. 24 hr trend......2 percent down. * 20ft wind..........East 2 to 7 mph shifting to the south in the afternoon. Gusts up to 15 mph. * Chc Wetting Rain...Zero. * Mixing Height......12000-13000 ft AGL. * Transport Wind.....East 15 mph shifting to the south in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Slight chance of showers. Lows 57 to 62. Highs in the lower 90s. East wind 5 to 10 mph with gusts to around 20 mph. .THURSDAY...Partly cloudy. Lows in the upper 50s. Highs around 90. East wind 10 to 15 mph with gusts to 25 mph. .FRIDAY...Partly cloudy. Lows in the upper 50s. Highs in the mid 80s. West wind 10 to 20 mph with gusts to 30 mph. .SATURDAY...Partly cloudy with slight chance of rain. Lows in the mid 50s. Highs in the lower 80s. .SUNDAY...Mostly clear. Lows in the lower 50s. Highs around 80. $$ IDZ427-242245- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy. Chance of showers and thunderstorms in the afternoon. * Chc of thunder.....40 percent. * Max Temperature....Around 88 valleys. 79-86 ridges. 24 hr trend......Little change. * Min Humidity.......28-36 percent. 24 hr trend......3 percent up. * 20ft wind.......... Valleys/lwr slopes...Southeast 2 to 7 mph shifting to the southwest 2 to 8 mph in the afternoon. Ridges/upr slopes....Southwest 2 to 8 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......11750-12750 ft AGL. * Transport Wind.....South 10 to 15 mph. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Chance of showers and thunderstorms in the evening. * Chc of thunder.....40 percent. * Min Temperature....54-61. 24 hr trend......2 degrees down. * Max Humidity.......73-81 percent valleys. 69-77 percent ridges. 24 hr trend......6 percent up. * 20ft wind.......... Valleys/lwr slopes...South 2 to 9 mph. Ridges/upr slopes....South 2 to 9 mph with gusts to 15 mph. * Chc Wetting Rain...20 percent. * Mixing Height......1250-2250 ft AGL. * Transport Wind.....South 10 mph. .TUESDAY... * Sky/weather........Mostly sunny then becoming mostly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....Around 88 valleys. 79-86 ridges. 24 hr trend......Little change. * Min Humidity.......24-32 percent. 24 hr trend......5 percent down. * 20ft wind.......... Valleys/lwr slopes...Southeast 2 to 6 mph shifting to the east 2 to 7 mph in the afternoon. Ridges/upr slopes....South 2 to 7 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......11500-12500 ft AGL. * Transport Wind.....Southeast 10 mph increasing to south 20 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly cloudy. Slight chance of showers and thunderstorms. Lows 57 to 64. Highs 82 to 89. Southeast wind 5 to 10 mph with gusts to 15 mph. .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 57 to 64. Highs 81 to 88. South wind 5 to 10 mph with gusts to 20 mph. .FRIDAY...Partly cloudy. Lows 56 to 63. Highs 77 to 84. Southwest winds 10 to 15 mph with gusts to 20 mph. .SATURDAY...Partly cloudy with chance of rain. Lows in the upper 50s. Highs in the upper 70s. .SUNDAY...Partly cloudy. Slight chance of rain. Lows in the mid 50s. Highs in the upper 70s. $$ IDZ410-242245- Upper Snake River Valley/Idaho Falls BLM- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....10 percent. * Max Temperature....80-87. 24 hr trend......2 degrees down. * Min Humidity.......23-31 percent. 24 hr trend......Little change. * 20ft wind..........East 2 to 7 mph shifting to the southwest 3 to 9 mph in the afternoon. Gusts up to 15 mph. * Chc Wetting Rain...10 percent. * Mixing Height......11500-12500 ft AGL. * Transport Wind.....Becoming southwest 15 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Slight chance of showers and thunderstorms in the evening. * Chc of thunder.....20 percent. * Min Temperature....50-57. 24 hr trend......Little change. * Max Humidity.......74-82 percent. 24 hr trend......2 percent up. * 20ft wind..........Southwest 3 to 9 mph with gusts to 15 mph shifting to the east 2 to 7 mph after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......1000-2000 ft AGL. * Transport Wind.....Southwest 15 mph shifting to the east after midnight. .TUESDAY... * Sky/weather........Mostly sunny. * Chc of thunder.....Zero. * Max Temperature....81-88. 24 hr trend......Little change. * Min Humidity.......20-28 percent. 24 hr trend......2 percent down. * 20ft wind..........Northeast 2 to 7 mph shifting to the southwest in the afternoon. Gusts up to 15 mph. * Chc Wetting Rain...Zero. * Mixing Height......11500-12500 ft AGL. * Transport Wind.....East 10 mph increasing to southwest 20 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Lows 51 to 58. Highs 82 to 89. North winds 5 to 10 mph with gusts to 15 mph. .THURSDAY...Partly cloudy. Slight chance of showers. Lows 51 to 58. Highs 81 to 88. East wind 10 to 15 mph with gusts to 25 mph. .FRIDAY...Partly cloudy. Lows 50 to 57. Highs 77 to 84. Southwest winds 10 to 20 mph with gusts to 30 mph. .SATURDAY...Partly cloudy with slight chance of rain. Lows in the lower 50s. Highs in the upper 70s. .SUNDAY...Mostly clear. Slight chance of rain. Lows around 50. Highs in the upper 70s. $$ IDZ411-242245- Centennial Mountains and Snake River Range/Targhee NF- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....Around 81 valleys. 71-78 ridges. 24 hr trend......Little change. * Min Humidity.......31-39 percent. 24 hr trend......2 percent down. * 20ft wind.......... Valleys/lwr slopes...Southwest 2 to 9 mph. Ridges/upr slopes....Southwest 2 to 9 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......10500-11500 ft AGL. * Transport Wind.....South 10 mph increasing to southwest 20 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Slight chance of showers and thunderstorms in the evening. * Chc of thunder.....20 percent. * Min Temperature....47-54. 24 hr trend......Little change. * Max Humidity.......86-94 percent valleys. 77-85 percent ridges. 24 hr trend......Little change. * 20ft wind.......... Valleys/lwr slopes...Southwest 2 to 6 mph shifting to the east 1 to 5 mph after midnight. Ridges/upr slopes....Southwest 2 to 7 mph with gusts to 15 mph shifting to the southeast 2 to 6 mph after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......1250-2250 ft AGL. * Transport Wind.....Southwest 10 mph in the evening. .TUESDAY... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....10 percent. * Max Temperature....Around 83 valleys. 72-79 ridges. 24 hr trend......Little change. * Min Humidity.......25-32 percent valleys. 28-36 percent ridges. 24 hr trend......Little change. * 20ft wind.......... Valleys/lwr slopes...East 1 to 5 mph shifting to the southwest 2 to 6 mph in the afternoon. Ridges/upr slopes....Southeast 1 to 5 mph shifting to the southwest 2 to 7 mph with gusts to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......9500-10500 ft AGL. * Transport Wind.....South 10 mph increasing to southwest 20 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Mostly cloudy. Slight chance of showers and thunderstorms. Lows 48 to 55. Highs 74 to 81. East wind 5 to 10 mph with gusts to 20 mph. .THURSDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows 48 to 55. Highs 72 to 79. Southeast wind 10 to 15 mph with gusts to 25 mph. .FRIDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 47 to 54. Highs 68 to 75. South wind 10 to 15 mph with gusts to 30 mph. .SATURDAY...Partly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the upper 40s. Highs around 70. .SUNDAY...Partly cloudy. Chance of rain. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ413-242245- Caribou Range/Caribou NF- 233 AM MDT Mon Aug 24 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. Chance of showers and thunderstorms in the afternoon. * Chc of thunder.....40 percent. * Max Temperature....81-88 valleys. 74-81 ridges. 24 hr trend......Little change. * Min Humidity.......30-38 percent. 24 hr trend......4 percent up. * 20ft wind.......... Valleys/lwr slopes...Southeast 2 to 6 mph shifting to the southwest 2 to 7 mph in the afternoon. Ridges/upr slopes....South 2 to 7 mph shifting to the west 2 to 8 mph with gusts to 15 mph in the afternoon. * Chc Wetting Rain...20 percent. * Mixing Height......11500-12500 ft AGL. * Transport Wind.....Southeast 10 mph shifting to the southwest in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy. Chance of rain showers and slight chance of thunderstorms in the evening, then slight chance of rain showers after midnight. * Chc of thunder.....20 percent. * Min Temperature....50-57. 24 hr trend......2 degrees down. * Max Humidity.......73-81 percent. 24 hr trend......Little change. * 20ft wind.......... Valleys/lwr slopes...Northwest 2 to 7 mph shifting to the southeast 2 to 6 mph after midnight. Ridges/upr slopes....Southwest 2 to 7 mph with gusts to 15 mph shifting to the southeast after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......1250-2250 ft AGL. * Transport Wind.....West 10 mph shifting to the southeast after midnight. .TUESDAY... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....83-90 valleys. 75-82 ridges. 24 hr trend......Little change. * Min Humidity.......23-31 percent. 24 hr trend......7 percent down. * 20ft wind.......... Valleys/lwr slopes...Southeast 1 to 5 mph shifting to the west 2 to 7 mph in the afternoon. Ridges/upr slopes....Southeast 2 to 6 mph shifting to the west 2 to 8 mph with gusts to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * Mixing Height......11500-12500 ft AGL. * Transport Wind.....Southeast 10 mph increasing to southwest 20 mph in the afternoon. .Forecast days 3 through 7...... .WEDNESDAY...Partly cloudy. Lows 52 to 59. Highs 80 to 87. East winds 5 to 10 mph with gusts to 15 mph. .THURSDAY...Partly cloudy. Lows 53 to 60. Highs 80 to 87. Southeast wind 10 to 15 mph with gusts to 20 mph. .FRIDAY...Partly cloudy. Lows 52 to 59. Highs 77 to 84. South winds 10 to 15 mph with gusts to 25 mph. .SATURDAY...Mostly cloudy. Chance of showers and slight chance of thunderstorms. Lows in the mid 50s. Highs in the upper 70s. .SUNDAY...Partly cloudy with slight chance of rain. Lows in the lower 50s. Highs in the mid 70s. $$ .OUTLOOK from Monday 31 August to Sunday 6 September: Moderate confidence of above normal temperatures. Weak confidence of near to above normal precipitation. Messick $$