Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
017
FNUS55 KPIH 190709
FWFPIH
Fire Weather Planning Forecast for Southeast Idaho
National Weather Service Pocatello ID
109 AM MDT Sat Sep 19 2026
.DISCUSSION...
* Central Idaho Dispatch Area weather impact summary (Zones 475
and 476)...
Showers and isolated thunderstorms are likely today as a low
pressure system arrives. Additional rainfall amounts today look
mainly light. Drier weather returns for Sunday and will continue
through early next week. Winds should remain mainly light into
early next week.
* East Idaho Dispatch Area weather impact summary (Zones 410...411
and 413)...
Showers and isolated thunderstorms are likely today as a low
pressure system arrives. Additional rainfall amounts today look
mainly light. Drier weather returns for Sunday and will continue
through early next week. Winds should remain mainly light into
early next week.
* South Central Idaho Dispatch Area weather impact summary (Zones
422...425 and 427)...
Showers and isolated thunderstorms are likely today as a low
pressure system arrives. Additional rainfall amounts today look
mainly light. Drier weather returns for Sunday and will continue
through early next week. Winds should remain mainly light into
early next week.
IDZ475-192215-
East Salmon River Mountains/Salmon NF-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Mostly cloudy. Chance of rain in the morning,
then chance of rain showers and slight chance
of thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....54-61 valleys and 46-53 ridges.
24 hr trend......3 degrees down.
* Min Humidity.......63-71 percent valleys and 67-75 percent
ridges.
24 hr trend......4 percent up.
* 20ft winds.........
Valleys/lwr slopes...North 4 to 5 mph.
Ridges/upr slopes....North 4 to 6 mph.
* Chc Wetting Rain...40 percent.
* Mixing Height......4000-5000 ft AGL.
* Transport Winds....Light winds.
.TONIGHT...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Min Temperature....38-45.
24 hr trend......2 degrees down.
* Max Humidity.......83-91 percent.
24 hr trend......7 percent down.
* 20ft winds.........
Valleys/lwr slopes...North 4 to 5 mph in the evening becoming
light.
Ridges/upr slopes....North 4 to 5 mph in the evening becoming
light.
* Chc Wetting Rain...10 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Max Temperature....63-70 valleys and 54-61 ridges.
24 hr trend......9 degrees up.
* Min Humidity.......34-42 percent valleys and 38-46 percent
ridges.
24 hr trend......27 percent down.
* 20ft winds.........
Valleys/lwr slopes...Light winds becoming northwest around 4
mph in the afternoon.
Ridges/upr slopes....Light winds becoming northwest 4 to 5 mph
in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......6500-7500 ft AGL.
* Transport Winds....Light winds becoming northwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 39 to 46. Highs 63 to 70. South winds up to
5 mph.
.TUESDAY...Mostly clear. Lows 42 to 49. Highs 63 to 70. Southwest
winds up to 5 mph with gusts to around 15 mph.
.WEDNESDAY...Mostly clear. Lows 42 to 49. Highs 64 to 71.
Southwest winds 5 to 10 mph with gusts to around 15 mph.
.THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
60s.
.FRIDAY...Partly cloudy. Lows in the mid 40s. Highs in the mid
60s.
$$
IDZ476-192215-
Lemhi and Lost River Range/Challis NF-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Mostly cloudy. Chance of rain in the morning,
then chance of rain showers and slight chance
of thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....55-62 valleys and 44-51 ridges.
24 hr trend......4 degrees down.
* Min Humidity.......59-67 percent valleys and 67-75 percent
ridges.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...Light winds becoming north 4 to 5 mph in
the afternoon.
Ridges/upr slopes....North 4 to 6 mph.
* Chc Wetting Rain...20 percent.
* Mixing Height......3750-4750 ft AGL.
* Transport Winds....Light winds.
.TONIGHT...
* Sky/weather........Mostly cloudy then becoming partly cloudy.
Slight chance of rain in the evening.
* Chc of thunder.....0 percent.
* Min Temperature....37-44.
24 hr trend......2 degrees down.
* Max Humidity.......85-93 percent.
24 hr trend......6 percent down.
* 20ft winds.........
Valleys/lwr slopes...North 4 to 5 mph in the evening becoming
light.
Ridges/upr slopes....North 4 to 6 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Max Temperature....61-68 valleys and 51-58 ridges.
24 hr trend......7 degrees up.
* Min Humidity.......40-48 percent valleys and 50-58 percent
ridges.
24 hr trend......18 percent down.
* 20ft winds.........
Valleys/lwr slopes...Light winds becoming northwest around 4
mph in the afternoon.
Ridges/upr slopes....Northwest 4 to 6 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......5250-6250 ft AGL.
* Transport Winds....Light winds becoming northwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 38 to 45. Highs 61 to 68. South winds 5 to
10 mph with gusts to around 15 mph.
.TUESDAY...Partly cloudy. Lows 40 to 47. Highs 62 to 69. South
winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Partly cloudy. Lows 40 to 47. Highs 63 to 70. South
winds 5 to 10 mph with gusts to around 20 mph.
.THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the upper
60s.
.FRIDAY...Partly cloudy. Lows in the mid 40s. Highs in the upper
60s.
$$
IDZ422-192215-
Sawtooth Range/Northern Sawtooth NF-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Partly cloudy then becoming mostly cloudy.
Slight chance of rain in the morning, then
chance of rain showers and slight chance of
thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....56-63 valleys and 47-54 ridges.
24 hr trend......2 degrees down.
* Min Humidity.......51-59 percent valleys and 57-65 percent
ridges.
24 hr trend......3 percent down.
* 20ft winds.........
Valleys/lwr slopes...Northeast around 4 mph shifting to the
south 4 to 5 mph in the afternoon.
Ridges/upr slopes....North 4 to 6 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......4250-5250 ft AGL.
* Transport Winds....Light winds.
.TONIGHT...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Min Temperature....34-41.
24 hr trend......Little change.
* Max Humidity.......85-93 percent.
24 hr trend......5 percent down.
* 20ft winds.........
Valleys/lwr slopes...North 4 to 5 mph.
Ridges/upr slopes....North 4 to 5 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Max Temperature....62-69 valleys and 54-61 ridges.
24 hr trend......6 degrees up.
* Min Humidity.......37-45 percent valleys and 42-50 percent
ridges.
24 hr trend......14 percent down.
* 20ft winds.........
Valleys/lwr slopes...Northeast around 4 mph shifting to the
south 4 to 6 mph in the afternoon.
Ridges/upr slopes....North around 4 mph shifting to the west 4
to 6 mph in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......6500-7500 ft AGL.
* Transport Winds....Light winds becoming northwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 36 to 43. Highs 62 to 69. Southeast winds
5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Partly cloudy. Lows 39 to 46. Highs 63 to 70. South
winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Mostly clear. Lows 40 to 47. Highs 64 to 71.
Southwest winds 5 to 10 mph with gusts to around 15 mph.
.THURSDAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s.
.FRIDAY...Partly cloudy. Lows in the mid 40s. Highs in the upper
60s.
$$
IDZ425-192215-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Partly cloudy. Chance of rain in the morning,
then slight chance of showers and
thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....Around 65.
24 hr trend......3 degrees down.
* Min Humidity.......52-60 percent.
24 hr trend......3 percent down.
* 20ft winds.........Southwest winds 4 to 7 mph with gusts to
around 15 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......4750-5750 ft AGL.
* Transport Winds....Light winds becoming west around 10 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Mostly clear.
* Chc of thunder.....0 percent.
* Min Temperature....38-44.
24 hr trend......4 degrees down.
* Max Humidity.......91-99 percent.
24 hr trend......Little change.
* 20ft winds.........Southwest winds 4 to 5 mph shifting to the
east after midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy then becoming sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 71.
24 hr trend......7 degrees up.
* Min Humidity.......38-46 percent.
24 hr trend......12 percent down.
* 20ft winds.........East winds 4 to 5 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......5750-6750 ft AGL.
* Transport Winds....Light winds.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 42 to 47. Highs in the upper 70s. East
winds 5 to 10 mph with gusts to around 20 mph.
.TUESDAY...Partly cloudy. Lows 45 to 51. Highs in the upper 70s.
East winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Partly cloudy. Lows in the upper 40s. Highs around
80. East winds 5 to 10 mph with gusts to around 15 mph.
.THURSDAY...Clear. Lows in the upper 40s. Highs in the lower 80s.
.FRIDAY...Partly cloudy. Lows in the upper 40s. Highs in the
lower 80s.
$$
IDZ427-192215-
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Mostly cloudy. Scattered rain showers through
the day. Slight chance of thunderstorms in the
afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....57-64.
24 hr trend......3 degrees down.
* Min Humidity.......50-58 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...West 4 to 9 mph.
Ridges/upr slopes....West 4 to 9 mph with gusts to around 20
mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......4750-5750 ft AGL.
* Transport Winds....West around 10 mph.
.TONIGHT...
* Sky/weather........Mostly clear.
* Chc of thunder.....0 percent.
* Min Temperature....37-44.
24 hr trend......3 degrees down.
* Max Humidity.......83-91 percent valleys and 74-82 percent
ridges.
24 hr trend......3 percent up.
* 20ft winds.........
Valleys/lwr slopes...West 4 to 6 mph shifting to the south 4 to
5 mph after midnight.
Ridges/upr slopes....Northwest 4 to 8 mph. Gusts up to 15 mph
in the evening.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....West around 10 mph in the evening becoming
light.
.SUNDAY...
* Sky/weather........Partly cloudy then becoming mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 71 valleys and 63-70 ridges.
24 hr trend......8 degrees up.
* Min Humidity.......34-42 percent.
24 hr trend......18 percent down.
* 20ft winds.........
Valleys/lwr slopes...Southeast around 4 mph shifting to the
northeast 4 to 6 mph in the afternoon.
Ridges/upr slopes....South 4 to 5 mph shifting to the north 4
to 6 mph with gusts to around 15 mph in
the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......6500-7500 ft AGL.
* Transport Winds....Light winds becoming northwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.MONDAY...Mostly clear. Lows 42 to 49. Highs 70 to 77. Southeast
winds 5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Partly cloudy. Lows 47 to 54. Highs 70 to 77.
Southeast winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Partly cloudy. Lows 45 to 52. Highs 71 to 78. South
winds 10 to 15 mph with gusts to around 20 mph.
.THURSDAY...Clear. Lows in the upper 40s. Highs in the upper 70s.
.FRIDAY...Partly cloudy. Lows in the lower 50s. Highs in the
upper 70s.
$$
IDZ410-192215-
Upper Snake River Valley/Idaho Falls BLM-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Mostly cloudy then becoming partly cloudy.
Chance of rain in the morning, then chance of
rain showers and slight chance of
thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....57-63.
24 hr trend......6 degrees down.
* Min Humidity.......55-63 percent.
24 hr trend......2 percent down.
* 20ft winds.........Southeast winds 4 to 6 mph shifting to the
southwest in the afternoon.
* Chc Wetting Rain...10 percent.
* Mixing Height......4250-5250 ft AGL.
* Transport Winds....Light winds.
.TONIGHT...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Min Temperature....36-41.
24 hr trend......4 degrees down.
* Max Humidity.......88-96 percent.
24 hr trend......2 percent down.
* 20ft winds.........West winds 4 to 5 mph shifting to the
northeast around 4 mph after midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy then becoming mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....62-69.
24 hr trend......6 degrees up.
* Min Humidity.......44-52 percent.
24 hr trend......11 percent down.
* 20ft winds.........Northeast winds around 4 mph shifting to the
southwest in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......5500-6500 ft AGL.
* Transport Winds....Light winds becoming west around 10 mph in the
afternoon.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 37 to 43. Highs 68 to 75. East winds 5 to
10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows 40 to 46. Highs 70 to 77. Northeast
winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Partly cloudy. Lows 42 to 48. Highs 71 to 78.
Southeast winds 10 to 15 mph.
.THURSDAY...Clear. Lows in the mid 40s. Highs in the mid 70s.
.FRIDAY...Partly cloudy. Lows in the mid 40s. Highs in the upper
70s.
$$
IDZ411-192215-
Centennial Mountains and Snake River Range/Targhee NF-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Mostly cloudy. Rain likely and slight chance
of thunderstorms in the morning, then chance
of showers and thunderstorms in the afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....Around 60 valleys and 49-56 ridges.
24 hr trend......7 degrees down.
* Min Humidity.......55-63 percent valleys and 65-73 percent
ridges.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...Light winds becoming west around 4 mph in
the afternoon.
Ridges/upr slopes....Southeast around 4 mph shifting to the
west 4 to 5 mph in the afternoon.
* Chc Wetting Rain...30 percent.
* Mixing Height......3750-4750 ft AGL.
* Transport Winds....Light winds.
.TONIGHT...
* Sky/weather........Mostly cloudy then becoming partly cloudy.
Chance of rain showers and slight chance of
thunderstorms in the evening.
* Chc of thunder.....20 percent.
* Min Temperature....34-41.
24 hr trend......5 degrees down.
* Max Humidity.......91-99 percent valleys and 87-95 percent
ridges.
24 hr trend......4 percent down.
* 20ft winds.........
Valleys/lwr slopes...North around 4 mph.
Ridges/upr slopes....North around 4 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Max Temperature....Around 63 valleys and 53-60 ridges.
24 hr trend......4 degrees up.
* Min Humidity.......45-53 percent valleys and 54-62 percent
ridges.
24 hr trend......11 percent down.
* 20ft winds.........
Valleys/lwr slopes...West around 4 mph.
Ridges/upr slopes....West around 4 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......4500-5500 ft AGL.
* Transport Winds....Light winds becoming northwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 34 to 41. Highs 60 to 67. Southeast winds
5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows 37 to 44. Highs 62 to 69. Southeast
winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Partly cloudy. Lows 40 to 47. Highs 62 to 69.
Southeast winds 5 to 10 mph with gusts to around 20 mph.
.THURSDAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s.
.FRIDAY...Partly cloudy. Lows in the lower 40s. Highs in the
upper 60s.
$$
IDZ413-192215-
Caribou Range/Caribou NF-
109 AM MDT Sat Sep 19 2026
.Today...
* Sky/weather........Partly cloudy then becoming mostly cloudy.
Slight chance of rain in the morning, then
chance of showers and thunderstorms in the
afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....56-63.
24 hr trend......6 degrees down.
* Min Humidity.......54-62 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...North around 4 mph shifting to the west 4
to 6 mph in the afternoon.
Ridges/upr slopes....West 4 to 7 mph. Gusts up to 15 mph in the
afternoon.
* Chc Wetting Rain...10 percent.
* Mixing Height......5500-6500 ft AGL.
* Transport Winds....Light winds becoming west around 10 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Min Temperature....34-41.
24 hr trend......6 degrees down.
* Max Humidity.......83-91 percent.
24 hr trend......2 percent down.
* 20ft winds.........
Valleys/lwr slopes...Northwest 4 to 5 mph in the evening
becoming light.
Ridges/upr slopes....Northwest 4 to 6 mph with gusts to around
15 mph in the evening becoming light.
* Chc Wetting Rain...10 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....Light winds.
.SUNDAY...
* Sky/weather........Partly cloudy then becoming mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....63-70 valleys and 55-62 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......40-48 percent valleys and 45-53 percent
ridges.
24 hr trend......12 percent down.
* 20ft winds.........
Valleys/lwr slopes...Light winds becoming west 4 to 5 mph in
the afternoon.
Ridges/upr slopes....Light winds becoming northwest 4 to 6 mph
with gusts to around 15 mph in the
afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......6250-7250 ft AGL.
* Transport Winds....Light winds becoming northwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.MONDAY...Clear. Lows 36 to 43. Highs 67 to 74. East winds 5 to
10 mph with gusts to around 15 mph.
.TUESDAY...Partly cloudy. Lows 41 to 48. Highs 68 to 75. East
winds 5 to 10 mph with gusts to around 15 mph.
.WEDNESDAY...Partly cloudy. Slight chance of rain. Lows 42 to 49.
Highs 68 to 75. South winds 10 to 15 mph with gusts to around
20 mph.
.THURSDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s.
.FRIDAY...Partly cloudy. Lows in the mid 40s. Highs in the mid
70s.
$$
.OUTLOOK FOR SATURDAY SEPTEMBER 26 THROUGH FRIDAY OCTOBER 2...
Above normal temperatures and precipitation.
$$