973 FNUS55 KPIH 120954 FWFPIH Fire Weather Planning Forecast for Southeast Idaho National Weather Service Pocatello ID 354 AM MDT Tue Sep 12 2023 ...WINDY WEDNESDAY BUT HUMIDITIES ABOVE CRITICAL THRESHOLDS... .DISCUSSION... * Central Idaho Dispatch Area weather impact summary (Zones 475 and 476)... Isolated mainly dry thunderstorms are expected late today, becoming more widespread Wednesday as the upper ridge breaks down and a cold front sweeps through the region. Expect gusty winds especially at higher elevations Wednesday. * East Idaho Dispatch Area weather impact summary (Zones 410...411 and 413)... Upper ridge breaks down today into Wednesday, with a cold front sweeping through the district late in the day. Showers and thunderstorms arrive by Wednesday along with the front and an increase in winds. The strongest winds are expected across the Arco Desert in Zone 410 Wednesday afternoon and evening, and gusts should exceed critical thresholds. Humidities should remain elevated. * South Central Idaho Dispatch Area weather impact summary (Zones 422...425 and 427)... Isolated mainly dry thunderstorms are expected across higher elevations today, becoming more widespread Wednesday as the upper ridge breaks down and a cold front sweeps through the region. The strongest winds are expected across Zone 425 and higher elevations of Zone 422 Wednesday, and gusts should exceed critical thresholds. Humidities should remain elevated. IDZ475-130015- East Salmon River Mountains/Salmon NF- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Partly cloudy. * Max Temperature....70-77 valleys and 60-67 ridges. 24 hr trend......Little change. * Min Humidity.......21-29 percent. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...Southwest 6 to 11 mph. Ridges/upr slopes....Southwest 7 to 12 mph with gusts to 18 mph. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......10750-11750 ft AGL. * Transport Winds....Light winds becoming southwest around 15 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the evening. * Min Temperature....43-50. 24 hr trend......3 degrees down. * Max Humidity.......67-75 percent. 24 hr trend......19 percent up. * 20ft winds......... Valleys/lwr slopes...Southwest 7 to 10 mph shifting to the northwest 4 to 5 mph after midnight. Ridges/upr slopes....West 6 to 11 mph. * Chc Wetting Rain...0 percent. * LAL................3 decreasing to 1 after midnight. * Haines Index.......4. * Mixing Height......200-1200 ft AGL. * Transport Winds....West around 10 mph in the evening becoming light. .WEDNESDAY... * Sky/weather........Partly cloudy. Chance of rain showers and slight chance of thunderstorms in the afternoon. * Max Temperature....62-69 valleys and 54-61 ridges. 24 hr trend......7 degrees down. * Min Humidity.......34-42 percent. 24 hr trend......12 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 5 to 10 mph. Ridges/upr slopes....Northwest 7 to 12 mph with gusts to 22 mph. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 3 in the afternoon. * Haines Index.......3. * Mixing Height......7500-8500 ft AGL. * Transport Winds....Light winds becoming northwest around 10 mph in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Clear. Lows 38 to 45. Highs 61 to 68. North winds 10 to 15 mph with gusts to around 20 mph. .FRIDAY...Clear. Lows 40 to 47. Highs 65 to 72. East winds 5 to 10 mph with gusts to around 15 mph. .SATURDAY...Clear. Lows 42 to 49. Highs 66 to 73. Southwest winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the mid 40s. Highs in the upper 60s. .MONDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ476-130015- Lemhi and Lost River Range/Challis NF- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Partly cloudy then becoming mostly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature....71-78 valleys and 59-66 ridges. 24 hr trend......Little change. * Min Humidity.......22-30 percent valleys and 27-35 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...Southwest 6 to 11 mph. Ridges/upr slopes....Southwest 6 to 11 mph with gusts to 18 mph. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 3 in the afternoon. * Haines Index.......4. * Mixing Height......10750-11750 ft AGL. * Transport Winds....Light winds becoming southwest around 10 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly cloudy then becoming mostly clear. * Min Temperature....42-49. 24 hr trend......Little change. * Max Humidity.......64-72 percent valleys and 59-67 percent ridges. 24 hr trend......11 percent up. * 20ft winds......... Valleys/lwr slopes...Southwest 6 to 11 mph. Ridges/upr slopes....Southwest 6 to 11 mph. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......300-1300 ft AGL. * Transport Winds....Southwest around 10 mph in the evening becoming light. .WEDNESDAY... * Sky/weather........Partly cloudy. Chance of showers and thunderstorms in the afternoon. * Max Temperature....64-71 valleys and 54-61 ridges. 24 hr trend......5 degrees down. * Min Humidity.......31-39 percent valleys and 37-45 percent ridges. 24 hr trend......10 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 7 to 12 mph. Ridges/upr slopes....Northwest 8 to 13 mph with gusts to 22 mph. * Chc Wetting Rain...20 percent. * LAL................1 increasing to 4 in the afternoon. * Haines Index.......3. * Mixing Height......7500-8500 ft AGL. * Transport Winds....Light winds becoming west around 15 mph in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Clear. Lows 37 to 44. Highs 58 to 65. North winds 10 to 15 mph with gusts to around 20 mph. .FRIDAY...Clear. Lows 38 to 45. Highs 62 to 69. Northeast winds 10 to 15 mph with gusts to around 20 mph. .SATURDAY...Clear. Lows 40 to 47. Highs 64 to 71. South winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the mid 40s. Highs in the upper 60s. .MONDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ422-130015- Sawtooth Range/Northern Sawtooth NF- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature....71-78 valleys and 59-66 ridges. 24 hr trend......Little change. * Min Humidity.......21-29 percent valleys and 27-35 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...Northeast 4 to 6 mph shifting to the south 5 to 10 mph in the afternoon. Ridges/upr slopes....South 5 to 10 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 2 in the afternoon. * Haines Index.......4. * Mixing Height......10750-11750 ft AGL. * Transport Winds....Light winds becoming southwest around 10 mph in the afternoon. .TONIGHT... * Sky/weather........Mostly clear. * Min Temperature....42-49. 24 hr trend......Little change. * Max Humidity.......60-68 percent valleys and 56-64 percent ridges. 24 hr trend......9 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 5 to 10 mph shifting to the north 4 to 6 mph after midnight. Ridges/upr slopes....West 4 to 9 mph. Gusts up to 15 mph in the evening. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......300-1300 ft AGL. * Transport Winds....West around 10 mph in the evening becoming light. .WEDNESDAY... * Sky/weather........Partly cloudy. Chance of rain showers and slight chance of thunderstorms in the afternoon. * Max Temperature....67-74 valleys and 54-61 ridges. 24 hr trend......4 degrees down. * Min Humidity.......25-33 percent valleys and 35-43 percent ridges. 24 hr trend......6 percent up. * 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...10 percent. * LAL................1 increasing to 2 in the afternoon. * Haines Index.......3. * Mixing Height......7500-8500 ft AGL. * Transport Winds....West 10 to 15 mph. .Forecast days 3 through 7...... .THURSDAY...Clear. Lows 37 to 44. Highs 61 to 68. North winds 10 to 20 mph with gusts to around 25 mph. .FRIDAY...Clear. Lows 38 to 45. Highs 63 to 70. Northeast winds 10 to 15 mph. .SATURDAY...Clear. Lows 40 to 47. Highs 65 to 72. South winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the mid 40s. Highs in the upper 60s. .MONDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. $$ IDZ425-130015- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Mostly sunny. * Max Temperature....Around 82. 24 hr trend......Little change. * Min Humidity.......17-25 percent. 24 hr trend......Little change. * 20ft winds.........East winds 4 to 7 mph shifting to the south 5 to 10 mph with gusts to around 15 mph in the afternoon. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......11500-12500 ft AGL. * Transport Winds....East around 10 mph shifting to the south in the afternoon. .TONIGHT... * Sky/weather........Mostly clear. * Min Temperature....Around 51. 24 hr trend......Little change. * Max Humidity.......70-78 percent. 24 hr trend......11 percent up. * 20ft winds.........Southwest winds 6 to 11 mph shifting to the southeast 4 to 6 mph after midnight. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......300-1300 ft AGL. * Transport Winds....Southwest around 10 mph in the evening becoming light. .WEDNESDAY... * Sky/weather........Partly cloudy. * Max Temperature....Around 78. 24 hr trend......5 degrees down. * Min Humidity.......22-30 percent. 24 hr trend......4 percent up. * 20ft winds.........West winds 9 to 14 mph with gusts to around 25 mph. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......3. * Mixing Height......8000-9000 ft AGL. * Transport Winds....West 10 to 15 mph. .Forecast days 3 through 7...... .THURSDAY...Clear. Lows in the upper 40s. Highs in the mid 70s. Northwest winds 10 to 20 mph with gusts to around 25 mph. .FRIDAY...Clear. Lows in the upper 40s. Highs in the mid 70s. Northeast winds 10 to 15 mph. .SATURDAY...Clear. Lows in the upper 40s. Highs 77 to 82. East winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the upper 40s. Highs in the lower 80s. .MONDAY...Mostly clear. Lows in the upper 40s. Highs around 80. $$ IDZ427-130015- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Partly cloudy. Scattered rain showers and isolated thunderstorms in the afternoon. * Max Temperature....77-83 valleys and 69-76 ridges. 24 hr trend......Little change. * Min Humidity.......21-28 percent valleys and 26-34 percent ridges. 24 hr trend......Little change. * 20ft winds......... Valleys/lwr slopes...South 4 to 8 mph. Ridges/upr slopes....South 4 to 8 mph. Gusts up to 15 mph in the afternoon. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 2 in the afternoon. * Haines Index.......3. * Mixing Height......10750-11750 ft AGL. * Transport Winds....Light winds becoming south around 10 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. * Min Temperature....49-56. 24 hr trend......2 degrees down. * Max Humidity.......65-73 percent valleys and 61-69 percent ridges. 24 hr trend......11 percent up. * 20ft winds......... Valleys/lwr slopes...Southwest 4 to 8 mph. Ridges/upr slopes....Southwest 4 to 8 mph. Gusts up to 15 mph in the evening. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......3. * Mixing Height......300-1300 ft AGL. * Transport Winds....Southwest around 10 mph in the evening becoming light. .WEDNESDAY... * Sky/weather........Mostly sunny then becoming partly cloudy. Slight chance of showers and thunderstorms in the afternoon. * Max Temperature....72-77 valleys and 65-72 ridges. 24 hr trend......5 degrees down. * Min Humidity.......26-33 percent valleys and 31-39 percent ridges. 24 hr trend......5 percent up. * 20ft winds......... Valleys/lwr slopes...Northwest 7 to 12 mph. Ridges/upr slopes....Northwest 8 to 13 mph. Gusts up to 20 mph in the afternoon. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 2 in the afternoon. * Haines Index.......3. * Mixing Height......7000-8000 ft AGL. * Transport Winds....West 10 to 15 mph. .Forecast days 3 through 7...... .THURSDAY...Clear. Lows 43 to 50. Highs 65 to 72. Northwest winds 10 to 20 mph. .FRIDAY...Clear. Lows 44 to 51. Highs 67 to 74. Northeast winds 10 to 15 mph with gusts to around 25 mph. .SATURDAY...Clear. Lows 46 to 53. Highs 71 to 78. Southeast winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the lower 50s. Highs in the upper 70s. .MONDAY...Mostly clear. Slight chance of showers. Lows in the lower 50s. Highs in the mid 70s. $$ IDZ410-130015- Upper Snake River Valley/Idaho Falls BLM- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Mostly sunny then becoming partly cloudy. * Max Temperature....74-81. 24 hr trend......Little change. * Min Humidity.......19-27 percent. 24 hr trend......Little change. * 20ft winds.........East winds 4 to 7 mph shifting to the southwest 5 to 10 mph in the afternoon. Gusts up to 15 mph. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......11250-12250 ft AGL. * Transport Winds....Light winds becoming southwest around 10 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. * Min Temperature....46-52. 24 hr trend......Little change. * Max Humidity.......67-75 percent. 24 hr trend......5 percent up. * 20ft winds.........Southwest winds 6 to 11 mph shifting to the south 5 to 8 mph after midnight. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......400-1400 ft AGL. * Transport Winds....West around 10 mph shifting to the south after midnight. .WEDNESDAY... * Sky/weather........Partly cloudy. Chance of rain showers and slight chance of thunderstorms in the afternoon. * Max Temperature....70-77. 24 hr trend......4 degrees down. * Min Humidity.......24-32 percent. 24 hr trend......5 percent up. * 20ft winds.........Southwest winds 7 to 12 mph with gusts to around 25 mph. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 3 in the afternoon. * Haines Index.......3. * Mixing Height......8750-9750 ft AGL. * Transport Winds....West 10 to 15 mph. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 42 to 48. Highs 67 to 74. North winds 10 to 20 mph with gusts to around 25 mph. .FRIDAY...Clear. Lows 41 to 46. Highs 68 to 75. Northeast winds 10 to 20 mph with gusts to around 25 mph. .SATURDAY...Clear. Lows 42 to 47. Highs 71 to 78. East winds 5 to 10 mph with gusts to around 20 mph. .SUNDAY...Clear. Lows in the mid 40s. Highs in the mid 70s. .MONDAY...Mostly clear. Lows in the mid 40s. Highs in the mid 70s. $$ IDZ411-130015- Centennial Mountains and Snake River Range/Targhee NF- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Partly cloudy. * Max Temperature....Around 75 valleys and 65-72 ridges. 24 hr trend......Little change. * Min Humidity.......26-34 percent. 24 hr trend......2 percent down. * 20ft winds......... Valleys/lwr slopes...East 4 to 6 mph shifting to the southwest 4 to 8 mph in the afternoon. Ridges/upr slopes....Southeast 4 to 6 mph shifting to the southwest 5 to 8 mph with gusts to around 15 mph in the afternoon. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......10250-11250 ft AGL. * Transport Winds....Light winds becoming southwest around 10 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. * Min Temperature....43-49. 24 hr trend......Little change. * Max Humidity.......74-82 percent valleys and 62-70 percent ridges. 24 hr trend......3 percent up. * 20ft winds......... Valleys/lwr slopes...South 4 to 6 mph shifting to the east 4 to 5 mph after midnight. Ridges/upr slopes....West 5 to 8 mph with gusts to around 15 mph shifting to the southeast 4 to 6 mph after midnight. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......4. * Mixing Height......400-1400 ft AGL. * Transport Winds....West around 10 mph in the evening becoming light. .WEDNESDAY... * Sky/weather........Partly cloudy then becoming mostly cloudy. Chance of showers and thunderstorms in the afternoon. * Max Temperature....Around 71 valleys and 61-68 ridges. 24 hr trend......5 degrees down. * Min Humidity.......30-38 percent valleys and 35-43 percent ridges. 24 hr trend......8 percent up. * 20ft winds......... Valleys/lwr slopes...Southeast 4 to 6 mph shifting to the southwest 4 to 9 mph in the afternoon. Ridges/upr slopes....South 4 to 6 mph shifting to the west 7 to 12 mph in the afternoon. * Chc Wetting Rain...30 percent. * LAL................1 increasing to 4 in the afternoon. * Haines Index.......3. * Mixing Height......6250-7250 ft AGL. * Transport Winds....Light winds becoming west around 10 mph in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Chance of showers and thunderstorms. Lows 39 to 45. Highs 57 to 64. North winds 10 to 20 mph. .FRIDAY...Clear. Lows 37 to 44. Highs 60 to 67. Northeast winds 10 to 20 mph. .SATURDAY...Clear. Lows 39 to 45. Highs 62 to 69. East winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the lower 40s. Highs in the mid 60s. .MONDAY...Mostly clear. Lows in the lower 40s. Highs in the mid 60s. $$ IDZ413-130015- Caribou Range/Caribou NF- 354 AM MDT Tue Sep 12 2023 .Today... * Sky/weather........Mostly sunny then becoming partly cloudy. * Max Temperature....74-81 valleys and 67-74 ridges. 24 hr trend......Little change. * Min Humidity.......21-28 percent valleys and 24-32 percent ridges. 24 hr trend......3 percent down. * 20ft winds......... Valleys/lwr slopes...Southeast 4 to 5 mph shifting to the southwest 4 to 7 mph in the afternoon. Ridges/upr slopes....Southeast 4 to 7 mph shifting to the southwest in the afternoon. Gusts up to 15 mph. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......3. * Mixing Height......11000-12000 ft AGL. * Transport Winds....Light winds becoming southwest around 10 mph in the afternoon. .TONIGHT... * Sky/weather........Partly cloudy. * Min Temperature....46-53. 24 hr trend......Little change. * Max Humidity.......67-75 percent valleys and 63-71 percent ridges. 24 hr trend......7 percent up. * 20ft winds......... Valleys/lwr slopes...Southwest 5 to 8 mph shifting to the southeast 4 to 5 mph after midnight. Ridges/upr slopes....Southwest 4 to 7 mph with gusts to around 15 mph shifting to the south 4 to 6 mph after midnight. * Chc Wetting Rain...0 percent. * LAL................1. * Haines Index.......3. * Mixing Height......400-1400 ft AGL. * Transport Winds....Light winds. .WEDNESDAY... * Sky/weather........Partly cloudy. Chance of rain showers and slight chance of thunderstorms in the afternoon. * Max Temperature....70-77 valleys and 62-69 ridges. 24 hr trend......4 degrees down. * Min Humidity.......29-37 percent. 24 hr trend......6 percent up. * 20ft winds......... Valleys/lwr slopes...South 4 to 6 mph shifting to the west 4 to 9 mph in the afternoon. Ridges/upr slopes....Southwest 4 to 6 mph shifting to the west 7 to 12 mph in the afternoon. * Chc Wetting Rain...10 percent. * LAL................1 increasing to 3 in the afternoon. * Haines Index.......3. * Mixing Height......7250-8250 ft AGL. * Transport Winds....Light winds becoming west around 10 mph in the afternoon. .Forecast days 3 through 7...... .THURSDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows 42 to 49. Highs 64 to 71. Northwest winds 10 to 15 mph with gusts to around 20 mph. .FRIDAY...Mostly clear. Lows 40 to 47. Highs 65 to 72. Northeast winds 10 to 15 mph with gusts to around 20 mph. .SATURDAY...Clear. Lows 41 to 48. Highs 68 to 75. Southeast winds 5 to 10 mph with gusts to around 15 mph. .SUNDAY...Clear. Lows in the mid 40s. Highs in the lower 70s. .MONDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 70s. $$ .OUTLOOK FOR TUESDAY SEPTEMBER 19 THROUGH MONDAY SEPTEMBER 25... Above normal temperatures and precipitation. $$