Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
833
FNUS55 KPIH 180800
FWFPIH
Fire Weather Planning Forecast for Southeast Idaho
National Weather Service Pocatello ID
200 AM MDT Mon Aug 18 2025
.DISCUSSION...
* Central Idaho Dispatch Area weather impact summary (Zones 475
and 476)...
High pressure building in today will support the return of hot,
above normal temperatures and dry conditions, outside of isolated
showers and thunderstorms primarily this afternoon. Temperatures
will peak on Tuesday with near record to record warmth expected.
Afternoon RHs this week will be in the single digits and teens
each day with wind gusts up to around 25 mph each afternoon.
Monsoonal moisture building in by the weekend will lead to the
return of shower and thunderstorm chances into early next week.
* East Idaho Dispatch Area weather impact summary (Zones 410...411
and 413)...
High pressure building in today will support the return of hot,
above normal temperatures and dry conditions, outside of isolated
afternoon showers and thunderstorms in the Central Mountains east
along the Montana Divide. Temperatures will peak on Tuesday with
near record to record warmth expected. Afternoon RHs this week
will be in the single digits and teens each day with wind gusts
up to around 20-30 mph each afternoon. Monsoonal moisture building
in mid to late this week will support increasing shower and
thunderstorm chances heading into the weekend.
* South Central Idaho Dispatch Area weather impact summary (Zones
422...425 and 427)...
High pressure building in today will support the return of hot,
above normal temperatures and dry conditions, outside of isolated
afternoon showers and thunderstorms in the Central Mountains.
Temperatures will peak on Tuesday with near record to record
warmth expected. Afternoon RHs this week will be in the single
digits and teens each day with wind gusts up to around 25 mph
each afternoon. Monsoonal moisture building in mid to late this
week will support increasing shower and thunderstorm chances
heading into the weekend.
IDZ475-182215-
East Salmon River Mountains/Salmon NF-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Sunny then becoming partly cloudy. Slight
chance of showers and thunderstorms in the
afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....77-84 valleys and 68-75 ridges.
24 hr trend......7 degrees up.
* Min Humidity.......20-28 percent.
24 hr trend......12 percent down.
* 20ft winds.........
Valleys/lwr slopes...Southwest 6 to 11 mph.
Ridges/upr slopes....Southwest 6 to 11 mph with gusts to around
20 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......13500-14500 ft AGL.
* Transport Winds....South around 10 mph increasing to southwest
around 20 mph in the afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....51-58.
24 hr trend......4 degrees up.
* Max Humidity.......42-50 percent.
24 hr trend......19 percent down.
* 20ft winds.........
Valleys/lwr slopes...Southwest 5 to 8 mph shifting to the
southeast 4 to 5 mph after midnight.
Ridges/upr slopes....Southwest 6 to 9 mph with gusts to around
15 mph shifting to the south 4 to 6 mph
after midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....Southwest around 10 mph in the evening
becoming light.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....83-90 valleys and 74-81 ridges.
24 hr trend......6 degrees up.
* Min Humidity.......12-17 percent.
24 hr trend......9 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 5 to 10 mph.
Ridges/upr slopes....South 5 to 10 mph. Gusts up to 20 mph in
the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......15000-16500 ft AGL.
* Transport Winds....South around 10 mph increasing to around 20
mph in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Partly cloudy. Lows 52 to 59. Highs 75 to 82. West
winds 10 to 15 mph with gusts to around 20 mph.
.THURSDAY...Clear. Lows 47 to 54. Highs 74 to 81. Northwest winds
10 to 15 mph with gusts to around 20 mph.
.FRIDAY...Clear. Lows 46 to 53. Highs 77 to 84. Northwest winds
5 to 10 mph with gusts to around 15 mph.
.SATURDAY...Mostly clear. Lows in the lower 50s. Highs in the
lower 80s.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the mid 50s. Highs in the upper 70s.
$$
IDZ476-182215-
Lemhi and Lost River Range/Challis NF-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....79-86 valleys and 68-75 ridges.
24 hr trend......6 degrees up.
* Min Humidity.......16-24 percent.
24 hr trend......13 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 7 to 12 mph.
Ridges/upr slopes....South 8 to 13 mph with gusts to around 20
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14250-15250 ft AGL.
* Transport Winds....South around 10 mph increasing to southwest
around 20 mph in the afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....51-58.
24 hr trend......4 degrees up.
* Max Humidity.......32-40 percent.
24 hr trend......27 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 6 to 11 mph.
Ridges/upr slopes....South 6 to 11 mph. Gusts up to 20 mph in
the evening.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....South around 10 mph.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....85-92 valleys and 73-80 ridges.
24 hr trend......6 degrees up.
* Min Humidity.......9-14 percent.
24 hr trend......8 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 9 to 14 mph.
Ridges/upr slopes....South 9 to 14 mph. Gusts up to 15 mph
increasing to 25 mph in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......16000-17500 ft AGL.
* Transport Winds....South around 10 mph increasing to around 20
mph in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 52 to 59. Highs 76 to 83.
Southwest winds 10 to 15 mph with gusts to around 25 mph.
.THURSDAY...Clear. Lows 47 to 54. Highs 74 to 81. Northwest winds
10 to 15 mph with gusts to around 25 mph.
.FRIDAY...Clear. Lows 46 to 53. Highs 77 to 84. Northwest winds
10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs around 80.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the upper 70s.
$$
IDZ422-182215-
Sawtooth Range/Northern Sawtooth NF-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chc of thunder.....0 percent.
* Max Temperature....80-87 valleys and 68-75 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......12-20 percent valleys and 18-26 percent
ridges.
24 hr trend......12 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 6 to 11 mph.
Ridges/upr slopes....South 5 to 10 mph with gusts to around 20
mph increasing to 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....Southeast around 10 mph increasing to south
around 20 mph in the afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....51-58.
24 hr trend......3 degrees up.
* Max Humidity.......33-41 percent.
24 hr trend......26 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 5 to 8 mph shifting to the northeast
4 to 6 mph after midnight.
Ridges/upr slopes....South 5 to 10 mph. Gusts up to 15 mph in
the evening.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....South around 10 mph shifting to the southeast
after midnight.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....85-92 valleys and 73-80 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......10-15 percent.
24 hr trend......6 percent down.
* 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 6 to 11 mph with gusts to around 20
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14750-16250 ft AGL.
* Transport Winds....Southeast around 10 mph increasing to south
around 20 mph in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 53 to 60. Highs 77 to 84.
Southwest winds 10 to 15 mph with gusts to around 20 mph.
.THURSDAY...Clear. Lows 49 to 56. Highs 75 to 82. West winds
10 to 15 mph with gusts to around 25 mph.
.FRIDAY...Clear. Lows 48 to 55. Highs 78 to 85. Northwest winds
10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Mostly clear. Lows in the mid 50s. Highs in the lower
80s.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs in the upper 70s.
$$
IDZ425-182215-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 92.
24 hr trend......6 degrees up.
* Min Humidity.......12-17 percent.
24 hr trend......12 percent down.
* 20ft winds.........East winds 4 to 7 mph shifting to the south 5
to 8 mph with gusts to around 20 mph in the
afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......13250-14250 ft AGL.
* Transport Winds....East around 10 mph shifting to the south in
the afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....55-60.
24 hr trend......Little change.
* Max Humidity.......35-43 percent.
24 hr trend......35 percent down.
* 20ft winds.........South winds 5 to 8 mph with gusts to around 15
mph shifting to the east 4 to 7 mph after
midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....Southeast around 10 mph.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 98.
24 hr trend......5 degrees up.
* Min Humidity.......10-15 percent.
24 hr trend......Little change.
* 20ft winds.........Northeast winds 5 to 8 mph shifting to the
southeast 4 to 9 mph in the afternoon. Gusts
up to 20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14750-16250 ft AGL.
* Transport Winds....East around 10 mph shifting to the south in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows in the lower 60s. Highs 90 to 95.
Southwest winds 10 to 15 mph with gusts to around 20 mph.
.THURSDAY...Clear. Lows in the upper 50s. Highs in the lower 90s.
West winds 10 to 15 mph with gusts to around 25 mph.
.FRIDAY...Clear. Lows in the upper 50s. Highs in the lower 90s.
West winds 10 to 15 mph with gusts to around 20 mph.
.SATURDAY...Mostly clear. Lows around 60. Highs in the lower 90s.
.SUNDAY...Partly cloudy with slight chance of showers and
thunderstorms. Lows in the lower 60s. Highs in the upper 80s.
$$
IDZ427-182215-
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....87-92 valleys and 80-87 ridges.
24 hr trend......6 degrees up.
* Min Humidity.......11-16 percent.
24 hr trend......13 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 6 to 11 mph.
Ridges/upr slopes....South 6 to 11 mph with gusts to around 20
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......13000-14000 ft AGL.
* Transport Winds....South 10 to 15 mph.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....58-65.
24 hr trend......4 degrees up.
* Max Humidity.......24-32 percent.
24 hr trend......27 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 5 to 10 mph.
Ridges/upr slopes....South 5 to 10 mph with gusts to around 15
mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....South 10 to 15 mph.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....91-96 valleys and 84-91 ridges.
24 hr trend......4 degrees up.
* Min Humidity.......11-16 percent.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...South 7 to 12 mph.
Ridges/upr slopes....South 7 to 12 mph. Gusts up to 15 mph
increasing to 25 mph in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......14500-15500 ft AGL.
* Transport Winds....South around 10 mph increasing to around 20
mph in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 60 to 67. Highs 85 to 92.
Southwest winds 10 to 15 mph with gusts to around 25 mph.
.THURSDAY...Mostly clear. Lows 57 to 64. Highs 82 to 89. West
winds 10 to 15 mph with gusts to around 20 mph.
.FRIDAY...Mostly clear. Lows 57 to 64. Highs 85 to 92. Northwest
winds 5 to 10 mph with gusts to around 15 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the lower 60s. Highs in the
upper 80s.
.SUNDAY...Mostly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the lower 60s. Highs in the mid 80s.
$$
IDZ410-182215-
Upper Snake River Valley/Idaho Falls BLM-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chc of thunder.....0 percent.
* Max Temperature....84-91.
24 hr trend......4 degrees up.
* Min Humidity.......10-15 percent.
24 hr trend......9 percent down.
* 20ft winds.........East winds 4 to 7 mph shifting to the
southwest 6 to 11 mph in the afternoon. Gusts
up to 20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14500-15500 ft AGL.
* Transport Winds....East around 10 mph shifting to the southwest
in the afternoon.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....51-58.
24 hr trend......Little change.
* Max Humidity.......36-44 percent.
24 hr trend......32 percent down.
* 20ft winds.........South winds 6 to 11 mph shifting to the east 4
to 7 mph after midnight. Gusts up to 20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....South around 15 mph shifting to the southeast
after midnight.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....89-96.
24 hr trend......5 degrees up.
* Min Humidity.......7-12 percent.
24 hr trend......3 percent down.
* 20ft winds.........Northeast winds 4 to 7 mph shifting to the
south 4 to 9 mph in the afternoon. Gusts up to
15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14750-15750 ft AGL.
* Transport Winds....East around 10 mph shifting to the south in
the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 56 to 63. Highs 87 to 94. South
winds 10 to 15 mph with gusts to around 20 mph.
.THURSDAY...Mostly clear. Lows 53 to 60. Highs 84 to 91.
Southwest winds 10 to 15 mph with gusts to around 25 mph.
.FRIDAY...Clear. Lows 51 to 58. Highs 86 to 93. West winds 10 to
15 mph with gusts to around 20 mph.
.SATURDAY...Mostly clear. Slight chance of showers. Lows in the
mid 50s. Highs in the upper 80s.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs in the mid 80s.
$$
IDZ411-182215-
Centennial Mountains and Snake River Range/Targhee NF-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Mostly sunny. Slight chance of showers and
thunderstorms in the afternoon.
* Chc of thunder.....0 percent.
* Max Temperature....Around 86 valleys and 75-82 ridges.
24 hr trend......4 degrees up.
* Min Humidity.......14-22 percent.
24 hr trend......10 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 5 to 8 mph shifting to the
southwest 7 to 12 mph in the afternoon.
Gusts up to 20 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......14000-15000 ft AGL.
* Transport Winds....Southeast around 10 mph increasing to
southwest around 20 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.......47-55 percent valleys and 34-42 percent
ridges.
24 hr trend......34 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 4 to 7 mph shifting to the east 4 to
5 mph after midnight.
Ridges/upr slopes....Southwest 6 to 11 mph with gusts to around
20 mph shifting to the southeast 4 to 6
mph after midnight.
* Chc Wetting Rain...0 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....Southwest around 10 mph shifting to the
southeast after midnight.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....Around 91 valleys and 80-87 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......9-14 percent.
24 hr trend......5 percent down.
* 20ft winds.........
Valleys/lwr slopes...East 4 to 5 mph shifting to the southwest
4 to 6 mph in the afternoon.
Ridges/upr slopes....Southeast 4 to 6 mph shifting to the
southwest 5 to 10 mph with gusts to around
20 mph in the afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......13000-14000 ft AGL.
* Transport Winds....Southeast around 10 mph shifting to the
southwest in the afternoon.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 54 to 61. Highs 78 to 85. South
winds 10 to 15 mph with gusts to around 25 mph.
.THURSDAY...Mostly clear. Lows 50 to 57. Highs 76 to 83.
Southwest winds 10 to 15 mph with gusts to around 25 mph.
.FRIDAY...Clear. Lows 48 to 55. Highs 77 to 84. Northwest winds
5 to 10 mph with gusts to around 20 mph.
.SATURDAY...Mostly clear. Slight chance of showers and
thunderstorms. Lows in the lower 50s. Highs in the lower 80s.
.SUNDAY...Partly cloudy with chance of showers and thunderstorms.
Lows in the mid 50s. Highs in the upper 70s.
$$
IDZ413-182215-
Caribou Range/Caribou NF-
200 AM MDT Mon Aug 18 2025
.Today...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....82-89.
24 hr trend......4 degrees up.
* Min Humidity.......9-14 percent.
24 hr trend......8 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 6 to 11 mph.
Ridges/upr slopes....South 6 to 9 mph with gusts to around 15
mph shifting to the southwest 5 to 10 mph
with gusts to around 20 mph in the
afternoon.
* Chc Wetting Rain...0 percent.
* Mixing Height......14250-15250 ft AGL.
* Transport Winds....South 10 to 15 mph.
.TONIGHT...
* Sky/weather........Clear.
* Chc of thunder.....0 percent.
* Min Temperature....52-59.
24 hr trend......2 degrees up.
* Max Humidity.......32-40 percent valleys and 28-36 percent
ridges.
24 hr trend......24 percent down.
* 20ft winds.........
Valleys/lwr slopes...South 6 to 9 mph shifting to the southeast
4 to 6 mph after midnight.
Ridges/upr slopes....Southwest 5 to 8 mph shifting to the
southeast 4 to 7 mph after midnight. Gusts
up to 15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......0-1000 ft AGL.
* Transport Winds....South around 10 mph.
.TUESDAY...
* Sky/weather........Sunny.
* Chc of thunder.....0 percent.
* Max Temperature....89-96 valleys and 82-89 ridges.
24 hr trend......5 degrees up.
* Min Humidity.......10 percent.
24 hr trend......2 percent down.
* 20ft winds.........
Valleys/lwr slopes...East 4 to 6 mph shifting to the south 6 to
9 mph in the afternoon.
Ridges/upr slopes....Southeast 4 to 7 mph shifting to the south
5 to 8 mph in the afternoon. Gusts up to
15 mph.
* Chc Wetting Rain...0 percent.
* Mixing Height......13750-14750 ft AGL.
* Transport Winds....South around 10 mph.
.Forecast days 3 through 7......
.WEDNESDAY...Mostly clear. Lows 57 to 64. Highs 85 to 92. South
winds 5 to 10 mph with gusts to around 25 mph.
.THURSDAY...Mostly clear. Slight chance of showers. Lows 56 to
63. Highs 82 to 89. West winds 10 to 15 mph with gusts to around
20 mph.
.FRIDAY...Mostly clear. Lows 53 to 60. Highs 85 to 92. North
winds 5 to 10 mph with gusts to around 20 mph.
.SATURDAY...Partly cloudy with chance of showers and slight
chance of thunderstorms. Lows in the upper 50s. Highs in the
upper 80s.
.SUNDAY...Partly cloudy with chance of showers and slight chance
of thunderstorms. Lows in the upper 50s. Highs in the lower 80s.
$$
.OUTLOOK...Monday August 25th through Sunday August 31st.
Near normal temperatures and above normal precipitation.
$$