Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
089
FNUS55 KPIH 190804
FWFPIH
Fire Weather Planning Forecast for Southeast Idaho
National Weather Service Pocatello ID
204 AM MDT Wed Aug 19 2026
.DISCUSSION...
* Central Idaho Dispatch Area weather impact summary (Zones 475
and 476)...
A ridge of high pressure returns today, with dry and very warm
conditions along with overall light winds. Monsoon moisture
returns Friday and especially through the weekend with storms more
likely to reach "scattered" levels on Saturday.
* East Idaho Dispatch Area weather impact summary (Zones 410...411
and 413)...
A ridge of high pressure returns today, with dry and very warm
conditions along with overall light winds. Monsoon moisture
returns Friday and especially through the weekend with storms more
likely to reach "scattered" levels on Saturday.
* South Central Idaho Dispatch Area weather impact summary (Zones
422...425 and 427)...
A ridge of high pressure returns today, with dry and very warm
conditions along with overall light winds. Monsoon moisture
returns Friday and especially through the weekend with storms more
likely to reach "scattered" levels on Saturday.
IDZ475-192230-
East Salmon River Mountains/Salmon NF-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....77-84 valleys and 68-75 ridges.
24 hr trend......3 degrees up.
* Min Humidity.......13-21 percent.
24 hr trend......7 percent down.
* 20ft winds.........
Valleys/lwr slopes...West 4 to 9 mph.
Ridges/upr slopes....West 4 to 9 mph with gusts to around 15
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......8750-9750 ft AGL.
* Transport Winds....Light winds becoming west around 15 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....50-56.
24 hr trend......3 degrees up.
* Max Humidity.......33-41 percent.
24 hr trend......12 percent down.
* 20ft winds.........
Valleys/lwr slopes...Northwest 4 to 7 mph shifting to the
southeast around 4 mph after midnight.
Ridges/upr slopes....Northwest 5 to 8 mph with gusts to around
15 mph shifting to the south 4 to 5 mph
after midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....Northwest around 10 mph in the evening
becoming light.
.THURSDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....82-89 valleys and 73-80 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......14-22 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...South around 4 mph shifting to the
southwest in the afternoon.
Ridges/upr slopes....South 4 to 5 mph shifting to the southwest
6 to 11 mph with gusts to around 20 mph in
the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......13000-14000 ft AGL.
* Transport Winds....Light winds becoming southwest around 15 mph
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 54 to 61. Highs 79 to 86. Southwest
winds 10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Showers likely and chance of thunderstorms. Lows
55 to 62. Highs 71 to 78. South winds 10 to 15 mph with gusts to
around 20 mph.
.SUNDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows 50 to 57. Highs 69 to 76. Southwest winds
10 to 15 mph with gusts to around 25 mph.
.MONDAY...Mostly clear with slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
$$
IDZ476-192230-
Lemhi and Lost River Range/Challis NF-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....78-85 valleys and 67-74 ridges.
24 hr trend......3 degrees up.
* Min Humidity.......13-21 percent valleys and 17-25 percent
ridges.
24 hr trend......7 percent down.
* 20ft winds.........
Valleys/lwr slopes...West 4 to 9 mph.
Ridges/upr slopes....West 4 to 9 mph with gusts to around 15
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........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....50-57.
24 hr trend......3 degrees up.
* Max Humidity.......35-43 percent.
24 hr trend......12 percent down.
* 20ft winds.........
Valleys/lwr slopes...West 4 to 8 mph.
Ridges/upr slopes....West 4 to 8 mph. Gusts up to 15 mph in the
evening.
* Chc Wetting Rain...0 percent.
* Mixing Height......400-1400 ft AGL.
* Transport Winds....Northwest around 10 mph in the evening
becoming light.
.THURSDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....83-90 valleys and 72-79 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......14-22 percent valleys and 19-27 percent
ridges.
24 hr trend......2 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southwest 5 to 10 mph.
Ridges/upr slopes....Southwest 5 to 10 mph with gusts to around
20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......13000-14000 ft AGL.
* Transport Winds....Light winds becoming west around 15 mph in the
afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 54 to 61. Highs 78 to 85. Southwest
winds 5 to 10 mph with gusts to around 20 mph.
.SATURDAY...Showers likely and chance of thunderstorms. Lows
54 to 61. Highs 70 to 77. South winds 10 to 15 mph with gusts to
around 20 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows 49 to 56. Highs 69 to 76. Southwest winds
10 to 15 mph with gusts to around 30 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows around 50. Highs in the lower 70s.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
$$
IDZ422-192230-
Sawtooth Range/Northern Sawtooth NF-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....81-88 valleys and 68-75 ridges.
24 hr trend......3 degrees up.
* Min Humidity.......13-18 percent valleys and 17-23 percent
ridges.
24 hr trend......3 percent down.
* 20ft winds.........
Valleys/lwr slopes...West 5 to 10 mph.
Ridges/upr slopes....West 5 to 10 mph with gusts to around 15
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......9250-10250 ft AGL.
* Transport Winds....Light winds becoming west around 15 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....51-58.
24 hr trend......5 degrees up.
* Max Humidity.......37-45 percent valleys and 32-40 percent
ridges.
24 hr trend......9 percent down.
* 20ft winds.........
Valleys/lwr slopes...West 6 to 9 mph shifting to the north 5 to
8 mph after midnight.
Ridges/upr slopes....West 4 to 8 mph with gusts to around 15
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....West around 10 mph in the evening becoming
light.
.THURSDAY...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....86-93 valleys and 73-80 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......12-20 percent valleys and 17-24 percent
ridges.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...East 4 to 6 mph shifting to the southwest
4 to 9 mph in the afternoon.
Ridges/upr slopes....Southwest 7 to 12 mph with gusts to around
20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......13750-14750 ft AGL.
* Transport Winds....Southeast around 10 mph shifting to the
southwest in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 55 to 62. Highs 81 to 88. West
winds 10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows 54 to 61. Highs 73 to 80. South winds 10 to
15 mph with gusts to around 20 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows 50 to 57. Highs 71 to 78. West winds 10 to
15 mph with gusts to around 30 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the mid 70s.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 50s. Highs in the lower 70s.
$$
IDZ425-192230-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 93.
24 hr trend......2 degrees up.
* Min Humidity.......13-21 percent.
24 hr trend......2 percent down.
* 20ft winds.........Northeast winds 4 to 6 mph shifting to the
west 6 to 9 mph with gusts to around 20 mph in
the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......10000-11000 ft AGL.
* Transport Winds....Light winds becoming west around 10 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....Around 62.
24 hr trend......4 degrees up.
* Max Humidity.......44-52 percent.
24 hr trend......12 percent down.
* 20ft winds.........West winds 6 to 9 mph shifting to the
northeast 5 to 8 mph after midnight. Gusts up
to 20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....West around 10 mph shifting to the northeast
after midnight.
.THURSDAY...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 98.
24 hr trend......5 degrees up.
* Min Humidity.......13-21 percent.
24 hr trend......Little change.
* 20ft winds.........Northeast winds 5 to 10 mph shifting to the
south 4 to 7 mph in the afternoon. Gusts up to
15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14250-15250 ft AGL.
* Transport Winds....East around 10 mph shifting to the southwest
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows in the mid 60s. Highs in the upper
90s. East winds 5 to 10 mph with gusts to around 20 mph.
.SATURDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 60s. Highs in the upper 80s.
Southeast winds 10 to 15 mph with gusts to around 20 mph.
.SUNDAY...Partly cloudy. Lows in the lower 60s. Highs in the
upper 80s. Southwest winds 10 to 15 mph with gusts to around
30 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 80s.
.TUESDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the upper 50s. Highs in the upper 80s.
$$
IDZ427-192230-
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Partly cloudy.
* Chc of thunder.....0 percent.
* Max Temperature....84-91.
24 hr trend......3 degrees up.
* Min Humidity.......15-23 percent.
24 hr trend......3 percent down.
* 20ft winds.........
Valleys/lwr slopes...North 4 to 8 mph.
Ridges/upr slopes....North 4 to 8 mph. Gusts up to 15 mph in
the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......9500-10500 ft AGL.
* Transport Winds....Light winds becoming west around 10 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....61-68.
24 hr trend......3 degrees up.
* Max Humidity.......38-46 percent valleys and 30-38 percent
ridges.
24 hr trend......3 percent down.
* 20ft winds.........
Valleys/lwr slopes...North 5 to 8 mph shifting to the south 4
to 6 mph after midnight.
Ridges/upr slopes....North 5 to 8 mph shifting to the southeast
after midnight. Gusts up to 15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....North around 10 mph shifting to the southeast
after midnight.
.THURSDAY...
* Sky/weather........Mostly sunny then becoming partly cloudy.
Slight chance of showers and thunderstorms in
the afternoon.
* Chc of thunder.....0 percent.
* Max Temperature....Around 95 valleys and 87-94 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......15-23 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...Southeast 4 to 7 mph shifting to the west
4 to 8 mph in the afternoon.
Ridges/upr slopes....Southwest 4 to 8 mph with gusts to around
15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......13000-14000 ft AGL.
* Transport Winds....South around 10 mph shifting to the southwest
in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 63 to 70. Highs 89 to 96. South
winds 10 to 15 mph with gusts to around 25 mph.
.SATURDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows 63 to 70. Highs 81 to 88. South winds 10 to
15 mph with gusts to around 25 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows 58 to 65. Highs 78 to 85. Southwest winds
5 to 10 mph with gusts to around 20 mph.
.MONDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
.TUESDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
$$
IDZ410-192230-
Upper Snake River Valley/Idaho Falls BLM-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....82-89.
24 hr trend......3 degrees up.
* Min Humidity.......15-23 percent.
24 hr trend......5 percent down.
* 20ft winds.........Northeast winds 4 to 6 mph shifting to the
southwest 4 to 7 mph with gusts to around 15
mph in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......10250-11250 ft AGL.
* Transport Winds....Light winds becoming west around 10 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....52-59.
24 hr trend......2 degrees up.
* Max Humidity.......49-57 percent.
24 hr trend......18 percent down.
* 20ft winds.........Southwest winds 4 to 7 mph shifting to the
northeast after midnight. Gusts up to 15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....Southwest around 10 mph shifting to the
northeast after midnight.
.THURSDAY...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....87-94.
24 hr trend......6 degrees up.
* Min Humidity.......15-23 percent.
24 hr trend......Little change.
* 20ft winds.........Northeast winds 4 to 7 mph shifting to the
southwest in the afternoon. Gusts up to 15
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......13250-14250 ft AGL.
* Transport Winds....Northeast around 10 mph shifting to the
southwest in the afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 56 to 63. Highs 88 to 95. East
winds 10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows 57 to 64. Highs 80 to 87. Southeast winds
10 to 15 mph with gusts to around 20 mph.
.SUNDAY...Partly cloudy. Slight chance of showers and
thunderstorms. Lows 52 to 59. Highs 78 to 85. South winds 10 to
15 mph with gusts to around 30 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
.TUESDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the mid 50s. Highs in the lower 80s.
$$
IDZ411-192230-
Centennial Mountains and Snake River Range/Targhee NF-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 81 valleys and 71-78 ridges.
24 hr trend......3 degrees up.
* Min Humidity.......20-28 percent.
24 hr trend......8 percent down.
* 20ft winds.........
Valleys/lwr slopes...Northeast 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...0 percent.
* Mixing Height......8250-9250 ft AGL.
* Transport Winds....Light winds becoming west around 15 mph in the
afternoon.
.TONIGHT...
* Sky/weather........Mostly clear.
* Chc of thunder.....0 percent.
* Min Temperature....48-55.
24 hr trend......2 degrees up.
* Max Humidity.......62-70 percent valleys and 45-53 percent
ridges.
24 hr trend......20 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 4 to 5 mph shifting to the northeast
after midnight.
Ridges/upr slopes....West 4 to 6 mph with gusts to around 15
mph shifting to the east after midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......400-1400 ft AGL.
* Transport Winds....Southwest around 10 mph in the evening
becoming light.
.THURSDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....85-90 valleys and 77-84 ridges.
24 hr trend......6 degrees up.
* Min Humidity.......21-29 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...East 4 to 5 mph shifting to the southwest
in the afternoon.
Ridges/upr slopes....Southeast 4 to 5 mph shifting to the
southwest 4 to 7 mph with gusts to around
15 mph in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......11250-12250 ft AGL.
* Transport Winds....Light winds becoming west around 15 mph in the
afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 53 to 60. Highs 79 to 86. Southeast
winds 5 to 10 mph with gusts to around 20 mph.
.SATURDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows 54 to 61. Highs 71 to 78. Southeast winds 10 to 15 mph with
gusts to around 20 mph.
.SUNDAY...Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows 49 to 56. Highs 69 to 76. South winds 10 to
15 mph with gusts to around 25 mph.
.MONDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s.
.TUESDAY...Partly cloudy with chance of showers and
thunderstorms. Lows around 50. Highs in the lower 70s.
$$
IDZ413-192230-
Caribou Range/Caribou NF-
204 AM MDT Wed Aug 19 2026
.Today...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....83-90 valleys and 75-82 ridges.
24 hr trend......3 degrees up.
* Min Humidity.......15-23 percent.
24 hr trend......7 percent down.
* 20ft winds.........
Valleys/lwr slopes...Northwest 4 to 8 mph.
Ridges/upr slopes....Northwest 4 to 9 mph with gusts to around
20 mph.
* 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........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....53-60.
24 hr trend......Little change.
* Max Humidity.......43-51 percent.
24 hr trend......14 percent down.
* 20ft winds.........
Valleys/lwr slopes...North 4 to 7 mph shifting to the east 4 to
6 mph after midnight.
Ridges/upr slopes....Northwest 5 to 8 mph shifting to the
southeast 4 to 6 mph after midnight. Gusts
up to 15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......400-1400 ft AGL.
* Transport Winds....North around 10 mph in the evening becoming
light.
.THURSDAY...
* Sky/weather........Mostly sunny.
* Chc of thunder.....0 percent.
* Max Temperature....88-95 valleys and 80-87 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......18-26 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...Southeast 4 to 5 mph shifting to the
southwest 5 to 8 mph in the afternoon.
Ridges/upr slopes....Southeast 4 to 6 mph shifting to the
southwest 5 to 8 mph in the afternoon.
Gusts up to 15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......12500-13500 ft AGL.
* Transport Winds....Light winds becoming west around 15 mph in the
afternoon.
.Forecast days 3 through 7......
.FRIDAY...Partly cloudy. Lows 57 to 64. Highs 87 to 94. Southeast
winds 10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Mostly cloudy. Chance of showers and thunderstorms.
Lows 58 to 65. Highs 78 to 85. South winds 10 to 15 mph with
gusts to around 20 mph.
.SUNDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows 53 to 60. Highs 76 to 83. South winds 10 to 15 mph with
gusts to around 20 mph.
.MONDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the upper 70s.
.TUESDAY...Partly cloudy. Chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the upper 70s.
$$
.OUTLOOK for Wednesday, August 26th to Tuesday, September 1st:
ABOVE NORMAL temperatures and NEAR to ABOVE NORMAL precipitation.
$$