FNUS55 KPIH 200804 FWFPIH Fire Weather Planning Forecast for Southeast Idaho National Weather Service Pocatello ID 204 AM MDT Wed May 20 2026 .DISCUSSION... * Central Idaho Dispatch Area weather impact summary (Zones 475 and 476)... Showers with isolated thunderstorms will develop this afternoon and continue Thursday morning. The best potential for wetting rains will be tonight. There will be some light snow accumulations on highest peaks and ridgelines. Warmer temperatures return Saturday through Monday with daytime temperatures will be 10-15 degrees ABOVE AVERAGE. There is a minimal (non-zero) potential for a few showers or storms Friday through Monday. * East Idaho Dispatch Area weather impact summary (Zones 410...411 and 413)... Showers with isolated thunderstorms will develop this afternoon and continue into Thursday afternoon. There will be some light snow accumulations on highest peaks and ridgelines. Warmer temperatures return Saturday through Monday with daytime temperatures will be 10-15 degrees ABOVE AVERAGE. There is a minimal (non-zero) potential for a few showers or storms Friday through Monday. * South Central Idaho Dispatch Area weather impact summary (Zones 422...425 and 427)... Showers with isolated thunderstorms will develop this afternoon and continue into Thursday afternoon, with the best chance across Zones 425 and 427. There will be some light snow accumulations on highest peaks and ridgelines. Warmer temperatures return Saturday through Monday with daytime temperatures will be 10-15 degrees ABOVE AVERAGE. There is a minimal (non-zero) potential for a few showers or storms Friday through Monday. IDZ475-202245- East Salmon River Mountains/Salmon NF- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. * Chc of thunder.....0 percent. * Max Temperature....54-61 valleys and 46-53 ridges. 24 hr trend......2 degrees up. * Min Humidity.......29-37 percent. 24 hr trend......5 percent up. * 20ft winds......... Valleys/lwr slopes...West 7 to 12 mph. Ridges/upr slopes....West 8 to 13 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......7250-8250 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Scattered showers and isolated thunderstorms in the evening. Scattered showers after midnight. * Chc of thunder.....20 percent. * Min Temperature....32-39 valleys and around 31 ridges. 24 hr trend......Little change. * Max Humidity.......79-87 percent. 24 hr trend......14 percent up. * 20ft winds......... Valleys/lwr slopes...North 8 to 13 mph. Ridges/upr slopes....North 8 to 13 mph. Gusts up to 25 mph decreasing to 15 mph after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......300-1300 ft AGL. * Transport Winds....North 10 to 15 mph. .THURSDAY... * Sky/weather........Partly cloudy then becoming sunny. * Chc of thunder.....0 percent. * Max Temperature....55-62 valleys and 47-54 ridges. 24 hr trend......Little change. * Min Humidity.......20-28 percent. 24 hr trend......8 percent down. * 20ft winds......... Valleys/lwr slopes...North 5 to 10 mph. Ridges/upr slopes....North 5 to 10 mph with gusts to around 25 mph. * Chc Wetting Rain...0 percent. * Mixing Height......9000-10000 ft AGL. * Transport Winds....North 10 to 15 mph. .Forecast days 3 through 7...... .FRIDAY...Partly cloudy. Lows 32 to 39. Highs 58 to 65. Northwest winds 10 to 15 mph with gusts to around 20 mph. .SATURDAY...Mostly clear.Lows 36 to 43. Highs 63 to 70. West winds 10 to 15 mph with gusts to around 25 mph. .SUNDAY...Mostly clear. Lows 39 to 46. Highs 68 to 75. Southwest winds 10 to 20 mph with gusts to around 35 mph. .MEMORIAL DAY...Mostly clear with slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the upper 60s. .TUESDAY...Cooler. Partly cloudy with chance of showers, snow and slight chance of thunderstorms. Lows around 40. Highs in the upper 50s. $$ IDZ476-202245- Lemhi and Lost River Range/Challis NF- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. Isolated showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....56-63 valleys and 45-52 ridges. 24 hr trend......3 degrees up. * Min Humidity.......25-33 percent valleys and 32-40 percent ridges. 24 hr trend......3 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 7 to 12 mph. Ridges/upr slopes....West 7 to 12 mph with gusts to around 20 mph. * Chc Wetting Rain...10 percent. * Mixing Height......8000-9000 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy. Showers likely and isolated thunderstorms in the evening. Scattered showers after midnight. * Chc of thunder.....20 percent. * Min Temperature....30-37. 24 hr trend......Little change. * Max Humidity.......80-88 percent valleys and 86-94 percent ridges. 24 hr trend......19 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 8 to 13 mph. Ridges/upr slopes....Northwest 9 to 14 mph with gusts to around 25 mph. * Chc Wetting Rain...10 percent. * Mixing Height......400-1400 ft AGL. * Transport Winds....Northwest around 15 mph. .THURSDAY... * Sky/weather........Partly cloudy then becoming mostly sunny. Isolated showers in the morning. * Chc of thunder.....0 percent. * Max Temperature....54-61 valleys and 42-49 ridges. 24 hr trend......2 degrees down. * Min Humidity.......22-30 percent valleys and 32-40 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...North 12 to 17 mph. Ridges/upr slopes....North 12 to 17 mph with gusts to around 35 mph. * Chc Wetting Rain...10 percent. * Mixing Height......9500-10500 ft AGL. * Transport Winds....North around 15 mph. .Forecast days 3 through 7...... .FRIDAY...Partly cloudy. Lows 30 to 37. Highs 55 to 62. Northwest winds 10 to 20 mph with gusts to around 30 mph. .SATURDAY...Mostly clear. Lows 34 to 41. Highs 62 to 69. Southwest winds 10 to 20 mph with gusts to around 25 mph. .SUNDAY...Breezy. Partly cloudy. Lows 38 to 45. Highs 67 to 74. Southwest winds 15 to 25 mph with gusts to around 35 mph. .MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs around 70. .TUESDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows in the lower 40s. Highs in the lower 60s. $$ IDZ422-202245- Sawtooth Range/Northern Sawtooth NF- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Mostly sunny then becoming mostly cloudy. Isolated showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....58-65 valleys and 45-52 ridges. 24 hr trend......4 degrees up. * Min Humidity.......25-33 percent valleys and 36-44 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...West 10 to 15 mph. Ridges/upr slopes....West 10 to 15 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......9000-10000 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. Isolated showers. * Chc of thunder.....0 percent. * Min Temperature....30-37. 24 hr trend......2 degrees up. * Max Humidity.......75-83 percent. 24 hr trend......18 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 10 to 15 mph. Ridges/upr slopes....North 10 to 15 mph. Gusts up to 25 mph in the evening. * Chc Wetting Rain...0 percent. * Mixing Height......200-1200 ft AGL. * Transport Winds....Northwest 10 to 15 mph. .THURSDAY... * Sky/weather........Partly cloudy then becoming sunny. Isolated showers in the morning. * Chc of thunder.....0 percent. * Max Temperature....57-64 valleys and 45-52 ridges. 24 hr trend......Little change. * Min Humidity.......19-27 percent valleys and 27-35 percent ridges. 24 hr trend......6 percent down. * 20ft winds......... Valleys/lwr slopes...North 6 to 11 mph. Ridges/upr slopes....North 6 to 11 mph with gusts to around 25 mph. * Chc Wetting Rain...0 percent. * Mixing Height......9750-10750 ft AGL. * Transport Winds....North 10 to 15 mph. .Forecast days 3 through 7...... .FRIDAY...Partly cloudy. Lows 32 to 39. Highs 56 to 63. Northeast winds 10 to 15 mph with gusts to around 20 mph. .SATURDAY...Clear. Lows 35 to 42. Highs 63 to 70. West winds 10 to 15 mph with gusts to around 25 mph. .SUNDAY...Mostly clear. Lows 39 to 46. Highs 67 to 74. West winds 10 to 20 mph with gusts to around 30 mph. .MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs in the lower 70s. .TUESDAY...Cooler. Partly cloudy with chance of rain and snow. Lows around 40. Highs around 60. $$ IDZ425-202245- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Mostly sunny then becoming partly cloudy. * Chc of thunder.....0 percent. * Max Temperature....66-71. 24 hr trend......5 degrees up. * Min Humidity.......21-26 percent. 24 hr trend......Little change. * 20ft winds.........Southwest winds 10 to 15 mph. Gusts up to 25 mph in the afternoon. * Chc Wetting Rain...0 percent. * Mixing Height......9500-10500 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming partly cloudy. Scattered rain showers after midnight. * Chc of thunder.....0 percent. * Min Temperature....Around 40. 24 hr trend......5 degrees up. * Max Humidity.......81-89 percent. 24 hr trend......15 percent up. * 20ft winds.........West winds 11 to 16 mph with gusts to around 25 mph shifting to the north 6 to 9 mph with gusts to around 15 mph after midnight. * Chc Wetting Rain...10 percent. * Mixing Height......200-1200 ft AGL. * Transport Winds....West around 15 mph shifting to the northeast after midnight. .THURSDAY... * Sky/weather........Mostly cloudy then becoming partly cloudy. Scattered rain showers in the morning. * Chc of thunder.....0 percent. * Max Temperature....Around 66. 24 hr trend......2 degrees down. * Min Humidity.......22-30 percent. 24 hr trend......4 percent up. * 20ft winds.........Northeast winds 4 to 6 mph shifting to the northwest 5 to 8 mph in the afternoon. Gusts up to15 mph. * Chc Wetting Rain...10 percent. * Mixing Height......9750-10750 ft AGL. * Transport Winds....North around 10 mph. .Forecast days 3 through 7...... .FRIDAY...Partly cloudy. Lows in the upper 30s. Highs in the lower 70s. East winds 5 to 10 mph with gusts to around 15 mph. .SATURDAY...Clear. Lows in the lower 40s. Highs in the lower 80s. South winds 10 to 15 mph with gusts to around 20 mph. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the mid 80s. Southwest winds 10 to 20 mph with gusts to around 30 mph. .MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. .TUESDAY...Not as warm. Partly cloudy. Lows in the mid 40s. Highs in the lower 70s. $$ IDZ427-202245- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Mostly sunny then becoming partly cloudy. * Chc of thunder.....0 percent. * Max Temperature....65-70 valleys and 57-64 ridges. 24 hr trend......6 degrees up. * Min Humidity.......20-27 percent valleys and 24-32 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...Southwest 4 to 6 mph shifting to the northwest 6 to 11 mph in the afternoon. Ridges/upr slopes....West 6 to 11 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......9500-10500 ft AGL. * Transport Winds....West 10 to 15 mph. .TONIGHT... * Sky/weather........Mostly cloudy. Scattered rain showers after midnight. * Chc of thunder.....0 percent. * Min Temperature....39-46. 24 hr trend......4 degrees up. * Max Humidity.......69-77 percent. 24 hr trend......19 percent up. * 20ft winds......... Valleys/lwr slopes...West 6 to 11 mph. Ridges/upr slopes....West 6 to 11 mph with gusts to around 20 mph. * Chc Wetting Rain...10 percent. * Mixing Height......200-1200 ft AGL. * Transport Winds....West 10 to 15 mph. .THURSDAY... * Sky/weather........Mostly cloudy then becoming mostly sunny. Scattered rain showers in the morning. * Chc of thunder.....0 percent. * Max Temperature....61-67 valleys and 54-61 ridges. 24 hr trend......4 degrees down. * Min Humidity.......23-31 percent valleys and 28-36 percent ridges. 24 hr trend......4 percent up. * 20ft winds......... Valleys/lwr slopes...North 10 to 15 mph. Ridges/upr slopes....North 10 to 15 mph with gusts to around 30 mph. * Chc Wetting Rain...10 percent. * Mixing Height......8750-9750 ft AGL. * Transport Winds....North around 15 mph. .Forecast days 3 through 7...... .FRIDAY...Partly cloudy. Lows 36 to 43. Highs 64 to 71. Southwest winds 10 to 20 mph with gusts to around 25 mph. .SATURDAY...Clear. Lows 41 to 48. Highs 72 to 79. Southwest winds 10 to 15 mph with gusts to around 20 mph. .SUNDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 47 to 54. Highs 75 to 82. Southwest winds 10 to 15 mph with gusts to around 20 mph. .MEMORIAL DAY...Mostly clear. Slight chance of rain. Lows in the lower 50s. Highs in the lower 80s. .TUESDAY...Cooler. Partly cloudy. Slight chance of showers. Lows in the upper 40s. Highs in the upper 60s. $$ IDZ410-202245- Upper Snake River Valley/Idaho Falls BLM- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Mostly sunny then becoming partly cloudy. Isolated rain showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....60-67. 24 hr trend......4 degrees up. * Min Humidity.......23-31 percent. 24 hr trend......2 percent up.* 20ft winds.........Southwest winds 8 to 13 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10000-11000 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .TONIGHT... * Sky/weather........Cloudy. Scattered showers and isolated thunderstorms in the evening. Scattered rain showers after midnight. * Chc of thunder.....20 percent. * Min Temperature....35-40. 24 hr trend......4 degrees up. * Max Humidity.......86-94 percent. 24 hr trend......25 percent up. * 20ft winds.........West winds 9 to 14 mph shifting to the north 8 to 13 mph after midnight. Gusts up to 20 mph. * Chc Wetting Rain...10 percent. * Mixing Height......400-1400 ft AGL. * Transport Winds....Northwest around 15 mph shifting to the north after midnight. .THURSDAY... * Sky/weather........Mostly cloudy then becoming partly cloudy. Scattered rain showers in the morning. Isolated showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....56-63. 24 hr trend......4 degrees down. * Min Humidity.......29-37 percent. 24 hr trend......6 percent up. * 20ft winds.........North winds 11 to 16 mph with gusts to around 30 mph. * Chc Wetting Rain...10 percent. * Mixing Height......9750-10750 ft AGL. * Transport Winds....North 15 to 20 mph. .Forecast days 3 through 7...... .FRIDAY...Mostly clear. Lows 31 to 36. Highs 62 to 69. Northeast winds 10 to 20 mph with gusts to around 25 mph. .SATURDAY...Mostly clear. Lows 36 to 41. Highs 71 to 78. South winds 10 to 15 mph with gusts to around 25 mph. .SUNDAY...Partly cloudy. Lows 40 to 46. Highs 75 to 82. Southwest winds 10 to 20 mph with gusts to around 30 mph. .MEMORIAL DAY...Mostly clear. Slight chance of rain. Lows in the mid 40s. Highs around 80. .TUESDAY...Partly cloudy. Lows in the mid 40s. Highs in the lower 70s. $$ IDZ411-202245- Centennial Mountains and Snake River Range/Targhee NF- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. Isolated showers and thunderstorms in the afternoon. * Chc of thunder.....20 percent. * Max Temperature....Around 60 valleys and 48-55 ridges. 24 hr trend......3 degrees up. * Min Humidity.......26-32 percent valleys and 33-41 percent ridges. 24 hr trend......5 percent up. * 20ft winds......... Valleys/lwr slopes...Southwest 4 to 9 mph. Ridges/upr slopes....Southwest 4 to 9 mph with gusts to around 15 mph. * Chc Wetting Rain...10 percent. * Mixing Height......8750-9750 ft AGL. * Transport Winds....Southwest 10 to 15 mph. .TONIGHT... * Sky/weather........Cloudy. Numerous showers and isolated thunderstorms. * Chc of thunder.....20 percent. * Min Temperature....30-37. 24 hr trend......2 degrees up. * Max Humidity.......91-99 percent valleys and 87-95 percent ridges. 24 hr trend......28 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 6 to 11 mph. Ridges/upr slopes....Northwest 7 to 12 mph with gusts to around 25 mph. * Chc Wetting Rain...50 percent. * Mixing Height......500-1500 ft AGL. * Transport Winds....Northwest around 10 mph. .THURSDAY... * Sky/weather........Cloudy then becoming partly cloudy. Scattered showers in the morning. Scattered showers and thunderstorms in the afternoon. * Chc of thunder.....35 percent. * Max Temperature....Around 55 valleys and 44-51 ridges. 24 hr trend......5 degrees down. * Min Humidity.......37-45 percent valleys and 48-56 percent ridges. 24 hr trend......11 percent up. * 20ft winds......... Valleys/lwr slopes...North 12 to 17 mph. Ridges/upr slopes....North 12 to 17 mph with gusts to around 35 mph. * Chc Wetting Rain...20 percent. * Mixing Height......8500-9500 ft AGL. * Transport Winds....North 15 to 20 mph. .Forecast days 3 through 7...... .FRIDAY...Mostly clear. Lows 26 to 32. Highs 52 to 59. Northeast winds 10 to 20 mph with gusts to around 30 mph. .SATURDAY...Mostly clear. Lows 32 to 39. Highs 60 to 67. South winds 10 to 15 mph with gusts to around 25 mph. .SUNDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 37 to 44. Highs 65 to 72. South winds 10 to 20 mph with gusts to around 35 mph. .MEMORIAL DAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the lower 70s. .TUESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the lower 60s. $$ IDZ413-202245- Caribou Range/Caribou NF- 204 AM MDT Wed May 20 2026 .Today... * Sky/weather........Mostly sunny then becoming partly cloudy. Isolated showers in the afternoon. * Chc of thunder.....0 percent. * Max Temperature....59-66 valleys and 51-58 ridges. 24 hr trend......5 degrees up. * Min Humidity.......24-32 percent valleys and 30-38 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...South 4 to 7 mph shifting to the west 5 to 10 mph in the afternoon. Ridges/upr slopes....Southwest 6 to 11 mph with gusts to around 20 mph. * Chc Wetting Rain...0 percent. * Mixing Height......10000-11000 ft AGL. * Transport Winds....Southwest 10 to 15 mph. .TONIGHT... * Sky/weather........Mostly cloudy. Isolated showers and thunderstorms in the evening, then scattered showers and isolated thunderstorms after midnight. * Chc of thunder.....20 percent. * Min Temperature....36-43. 24 hr trend......6 degrees up. * Max Humidity.......80-88 percent. 24 hr trend......23 percent up. * 20ft winds......... Valleys/lwr slopes...West 5 to 10 mph. Ridges/upr slopes....West 5 to 10 mph with gusts to around 20 mph. * Chc Wetting Rain...10 percent. * Mixing Height......400-1400 ft AGL. * Transport Winds....West around 10 mph. .THURSDAY... * Sky/weather........Mostly cloudy. Isolated showers and thunderstorms in the morning. Scattered showers and thunderstorms in the afternoon. * Chc of thunder.....50 percent. * Max Temperature....55-62 valleys and 46-53 ridges. 24 hr trend......5 degrees down. * Min Humidity.......35-43 percent valleys and 46-54 percent ridges. 24 hr trend......13 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 8 to 13 mph. Ridges/upr slopes....Northwest 8 to 13 mph with gusts to around 25 mph. * Chc Wetting Rain...20 percent. * Mixing Height......9000-10000 ft AGL. * Transport Winds....Northwest around 10 mph increasing to north around 20 mph in the afternoon. .Forecast days 3 through 7...... .FRIDAY...Mostly clear. Lows 30 to 37. Highs 59 to 66. North winds 10 to 20 mph with gusts to around 30 mph. .SATURDAY...Clear. Lows 34 to 41. Highs 67 to 74. South winds 10 to 15 mph with gusts to around 25 mph. .SUNDAY...Mostly clear. Slight chance of showers and thunderstorms. Lows 40 to 47. Highs 72 to 79. South winds 10 to 15 mph with gusts to around 25 mph. .MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs in the upper 70s. .TUESDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the upper 60s. $$ .OUTLOOK FOR May 27th-June 2nd: ABOVE AVERAGE TEMPERATURES and ABOVE AVERAGE PRECIPITATION. $$