Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Pocatello, ID
Issued by NWS Pocatello, ID
337
FNUS55 KPIH 170712
FWFPIH
Fire Weather Planning Forecast for Southeast Idaho
National Weather Service Pocatello ID
112 AM MDT Thu Sep 17 2026
.DISCUSSION...
* Central Idaho Dispatch Area weather impact summary (Zones 475
and 476)...
A low pressure system will produce occasional showers and
thunderstorms through Friday. Rainfall amounts of 0.25 to 0.50
inches are likely through Friday.
* East Idaho Dispatch Area weather impact summary (Zones 410...411
and 413)...
A low pressure system will produce occasional showers and
thunderstorms through Friday. Rainfall amounts of 0.25 to 0.75
inches are likely through Friday.
* South Central Idaho Dispatch Area weather impact summary (Zones
422...425 and 427)...
A low pressure system will produce occasional showers and
thunderstorms through Friday. Rainfall amounts of up to 0.25 inches
are likely through Friday.
IDZ475-172215-
East Salmon River Mountains/Salmon NF-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy. Slight chance of thunderstorms
in the morning. Chance of rain showers through
the day. Chance of thunderstorms in the
afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....68-75 valleys and 57-64 ridges.
24 hr trend......2 degrees down.
* Min Humidity.......41-49 percent valleys and 47-55 percent
ridges.
24 hr trend......16 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southeast 4 to 9 mph.
Ridges/upr slopes....Southeast 5 to 10 mph with gusts to around
20 mph.
* Chc Wetting Rain...20 percent.
* Mixing Height......6500-7500 ft AGL.
* Transport Winds....Southeast 10 to 15 mph.
.TONIGHT...
* Sky/weather........Partly cloudy. Chance of rain showers and
slight chance of thunderstorms in the evening.
Slight chance of rain after midnight.
* Chc of thunder.....20 percent.
* Min Temperature....41-48.
24 hr trend......2 degrees down.
* Max Humidity.......75-83 percent.
24 hr trend......13 percent up.
* 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 evening.
* Chc Wetting Rain...20 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....South around 10 mph in the evening becoming
light.
.FRIDAY...
* Sky/weather........Cloudy. Chance of rain in the morning, then
rain showers likely and slight chance of
thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....59-66 valleys and 50-57 ridges.
24 hr trend......8 degrees down.
* Min Humidity.......50-58 percent valleys and 54-62 percent
ridges.
24 hr trend......8 percent up.
* 20ft winds.........
Valleys/lwr slopes...Light winds becoming west 4 to 6 mph in
the afternoon.
Ridges/upr slopes....Southwest 4 to 6 mph.
* Chc Wetting Rain...70 percent.
* Mixing Height......6250-7250 ft AGL.
* Transport Winds....Light winds becoming southwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.SATURDAY...Showers likely. Lows 40 to 47. Highs 55 to 62.
Northwest winds up to 5 mph.
.SUNDAY...Mostly clear. Lows 39 to 46. Highs 62 to 69. West winds
up to 5 mph.
.MONDAY...Clear. Lows 40 to 47. Highs 64 to 71. Southwest winds
up to 5 mph.
.TUESDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
60s.
.WEDNESDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
60s.
$$
IDZ476-172215-
Lemhi and Lost River Range/Challis NF-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy. Slight chance of thunderstorms
in the morning. Chance of rain showers through
the day. Chance of thunderstorms in the
afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....69-76 valleys and 56-63 ridges.
24 hr trend......3 degrees down.
* Min Humidity.......41-49 percent valleys and 54-62 percent
ridges.
24 hr trend......18 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southeast 8 to 13 mph.
Ridges/upr slopes....Southeast 9 to 14 mph. Gusts up to 15 mph
increasing to 25 mph in the afternoon.
* Chc Wetting Rain...40 percent.
* Mixing Height......5250-6250 ft AGL.
* Transport Winds....Southeast around 10 mph increasing to south
around 20 mph in the afternoon.
.TONIGHT...
* Sky/weather........Partly cloudy. Chance of rain showers and
slight chance of thunderstorms in the evening,
then chance of rain after midnight.
* Chc of thunder.....20 percent.
* Min Temperature....41-48.
24 hr trend......3 degrees down.
* Max Humidity.......77-85 percent.
24 hr trend......6 percent up.
* 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 evening.
* Chc Wetting Rain...20 percent.
* Mixing Height......200-1200 ft AGL.
* Transport Winds....South around 10 mph in the evening becoming
light.
.FRIDAY...
* 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....61-68 valleys and 50-57 ridges.
24 hr trend......7 degrees down.
* Min Humidity.......44-52 percent valleys and 52-60 percent
ridges.
24 hr trend......3 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southwest 4 to 7 mph.
Ridges/upr slopes....Southwest 4 to 8 mph. Gusts up to 15 mph
in the afternoon.
* Chc Wetting Rain...50 percent.
* Mixing Height......6250-7250 ft AGL.
* Transport Winds....Light winds becoming southwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.SATURDAY...Showers likely and slight chance of thunderstorms.
Lows 38 to 45. Highs 55 to 62. Northwest winds 10 to 15 mph.
.SUNDAY...Mostly clear. Lows 37 to 44. Highs 60 to 67. Northwest
winds 5 to 10 mph with gusts to around 15 mph.
.MONDAY...Clear. Lows 39 to 46. Highs 63 to 70. Southwest winds
5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s.
.WEDNESDAY...Mostly clear. Lows in the mid 40s. Highs in the
upper 60s.
$$
IDZ422-172215-
Sawtooth Range/Northern Sawtooth NF-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy. Slight chance of thunderstorms
in the morning. Chance of rain showers through
the day. Chance of thunderstorms in the
afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....67-74 valleys and 55-62 ridges.
24 hr trend......5 degrees down.
* Min Humidity.......41-49 percent valleys and 52-60 percent
ridges.
24 hr trend......17 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southeast 6 to 11 mph.
Ridges/upr slopes....Southeast 6 to 11 mph with gusts to around
20 mph.
* Chc Wetting Rain...20 percent.
* Mixing Height......8000-9000 ft AGL.
* Transport Winds....Southeast 15 to 20 mph.
.TONIGHT...
* Sky/weather........Partly cloudy. Slight chance of showers and
thunderstorms in the evening. Slight chance of
rain after midnight.
* Chc of thunder.....20 percent.
* Min Temperature....39-46.
24 hr trend......6 degrees down.
* Max Humidity.......75-83 percent valleys and 71-79 percent
ridges.
24 hr trend......8 percent down.
* 20ft winds.........
Valleys/lwr slopes...Southeast 4 to 7 mph shifting to the north
4 to 6 mph after midnight.
Ridges/upr slopes....Southwest 5 to 8 mph with gusts to around
15 mph shifting to the southeast 4 to 5
mph after midnight.
* Chc Wetting Rain...10 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....South around 10 mph in the evening becoming
light.
.FRIDAY...
* 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....61-68 valleys and 49-56 ridges.
24 hr trend......6 degrees down.
* Min Humidity.......40-48 percent valleys and 51-59 percent
ridges.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...West 4 to 9 mph.
Ridges/upr slopes....West 4 to 9 mph. Gusts up to 15 mph in the
afternoon.
* Chc Wetting Rain...10 percent.
* Mixing Height......6500-7500 ft AGL.
* Transport Winds....Light winds becoming southwest around 10 mph
in the afternoon.
.Forecast days 3 through 7......
.SATURDAY...Partly cloudy. Chance of showers. Lows 35 to 42.
Highs 57 to 64. Northwest winds 5 to 10 mph with gusts to around
20 mph.
.SUNDAY...Clear. Lows 37 to 44. Highs 61 to 68. North winds 5 to
10 mph with gusts to around 15 mph.
.MONDAY...Clear. Lows 39 to 46. Highs 64 to 71. Southwest winds
5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s.
.WEDNESDAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s.
$$
IDZ425-172215-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy then becoming partly cloudy.
Chance of rain showers and slight chance of
thunderstorms.
* Chc of thunder.....20 percent.
* Max Temperature....77-83.
24 hr trend......3 degrees down.
* Min Humidity.......34-42 percent.
24 hr trend......7 percent up.
* 20ft winds.........East winds 9 to 14 mph shifting to the
southeast 7 to 12 mph in the afternoon. Gusts
up to 25 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......10500-11500 ft AGL.
* Transport Winds....Southeast 15 to 20 mph.
.TONIGHT...
* Sky/weather........Partly cloudy. Chance of rain and slight
chance of thunderstorms in the evening. Slight
chance of rain after midnight.
* Chc of thunder.....20 percent.
* Min Temperature....Around 49.
24 hr trend......7 degrees down.
* Max Humidity.......79-87 percent.
24 hr trend......11 percent up.
* 20ft winds.........East winds 5 to 10 mph with gusts to around 20
mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......100-1100 ft AGL.
* Transport Winds....Southeast around 15 mph shifting to the east
after midnight.
.FRIDAY...
* Sky/weather........Mostly cloudy then becoming partly cloudy.
Chance of rain in the morning. Chance of rain
showers and slight chance of thunderstorms in
the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....Around 72.
24 hr trend......10 degrees down.
* Min Humidity.......39-47 percent.
24 hr trend......6 percent up.
* 20ft winds.........West winds 6 to 11 mph with gusts to around 20
mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......7000-8000 ft AGL.
* Transport Winds....West around 10 mph.
.Forecast days 3 through 7......
.SATURDAY...Partly cloudy. Lows in the mid 40s. Highs in the
lower 70s. West winds 5 to 10 mph with gusts to around 20 mph.
.SUNDAY...Clear. Lows in the mid 40s. Highs in the mid 70s. East
winds up to 5 mph with gusts to around 15 mph.
.MONDAY...Clear. Lows in the upper 40s. Highs in the upper 70s.
East winds 5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows in the upper 40s. Highs around 80.
.WEDNESDAY...Mostly clear. Lows in the upper 40s. Highs in the
lower 80s.
$$
IDZ427-172215-
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Partly cloudy. Chance of rain in the morning.
Slight chance of showers and thunderstorms in
the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....72-79.
24 hr trend......Little change.
* Min Humidity.......31-39 percent.
24 hr trend......3 percent up.
* 20ft winds.........
Valleys/lwr slopes...South 7 to 17 mph.
Ridges/upr slopes....South 7 to 17 mph with gusts to around 30
mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......10250-11250 ft AGL.
* Transport Winds....South 15 to 20 mph.
.TONIGHT...
* Sky/weather........Partly cloudy. Chance of rain showers and
slight chance of thunderstorms in the evening,
then slight chance of rain after midnight.
* Chc of thunder.....20 percent.
* Min Temperature....46-53.
24 hr trend......7 degrees down.
* Max Humidity.......68-76 percent valleys and 62-70 percent
ridges.
24 hr trend......Little change.
* 20ft winds.........
Valleys/lwr slopes...Southwest 6 to 11 mph.
Ridges/upr slopes....South 6 to 11 mph shifting to the
northwest 5 to 8 mph after midnight. Gusts
up to 20 mph.
* Chc Wetting Rain...20 percent.
* Mixing Height......200-1200 ft AGL.
* Transport Winds....South around 15 mph shifting to the west after
midnight.
.FRIDAY...
* Sky/weather........Partly cloudy. Slight chance of rain in the
morning. Chance of rain showers and slight
chance of thunderstorms in the afternoon.
* Chc of thunder.....20 percent.
* Max Temperature....63-70.
24 hr trend......10 degrees down.
* Min Humidity.......42-50 percent.
24 hr trend......11 percent up.
* 20ft winds.........
Valleys/lwr slopes...Northwest 4 to 9 mph.
Ridges/upr slopes....Northwest 4 to 9 mph. Gusts up to 20 mph
in the afternoon.
* Chc Wetting Rain...20 percent.
* Mixing Height......7750-8750 ft AGL.
* Transport Winds....West around 10 mph.
.Forecast days 3 through 7......
.SATURDAY...Partly cloudy. Lows 41 to 48. Highs 63 to 70. West
winds 10 to 15 mph with gusts to around 20 mph.
.SUNDAY...Clear. Lows 42 to 49. Highs 68 to 75. Southwest winds
5 to 10 mph with gusts to around 20 mph.
.MONDAY...Mostly clear. Lows 44 to 51. Highs 72 to 79. Southeast
winds 5 to 10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows in the upper 40s. Highs in the mid
70s.
.WEDNESDAY...Mostly clear. Lows in the upper 40s. Highs in the
upper 70s.
$$
IDZ410-172215-
Upper Snake River Valley/Idaho Falls BLM-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy. Slight chance of thunderstorms
in the morning. Chance of rain showers through
the day. Chance of thunderstorms in the
afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....71-78.
24 hr trend......4 degrees down.
* Min Humidity.......44-52 percent.
24 hr trend......14 percent up.
* 20ft winds.........East winds 6 to 9 mph shifting to the
southeast 6 to 11 mph in the afternoon. Gusts
up to 20 mph.
* Chc Wetting Rain...30 percent.
* Mixing Height......6000-7000 ft AGL.
* Transport Winds....Southeast 10 to 15 mph.
.TONIGHT...
* Sky/weather........Partly cloudy then becoming mostly cloudy.
Chance of rain showers in the evening. Slight
chance of thunderstorms through the night.
Rain showers likely after midnight.
* Chc of thunder.....20 percent.
* Min Temperature....46-51.
24 hr trend......2 degrees down.
* Max Humidity.......88-96 percent.
24 hr trend......15 percent up.
* 20ft winds.........East winds 5 to 10 mph with gusts to around 20
mph.
* Chc Wetting Rain...30 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....East around 10 mph.
.FRIDAY...
* 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....66-72.
24 hr trend......5 degrees down.
* Min Humidity.......47-55 percent.
24 hr trend......3 percent up.
* 20ft winds.........Southeast winds 4 to 6 mph shifting to the
southwest 6 to 9 mph in the afternoon. Gusts
up to 15 mph.
* Chc Wetting Rain...20 percent.
* Mixing Height......6250-7250 ft AGL.
* Transport Winds....Southeast around 10 mph shifting to the
southwest in the afternoon.
.Forecast days 3 through 7......
.SATURDAY...Mostly cloudy. Chance of showers and slight chance of
thunderstorms. Lows 41 to 47. Highs 62 to 69. Southwest winds
5 to 10 mph with gusts to around 20 mph.
.SUNDAY...Partly cloudy. Lows 40 to 46. Highs 66 to 73. Northeast
winds 5 to 10 mph with gusts to around 15 mph.
.MONDAY...Clear. Lows 41 to 46. Highs 71 to 78. East winds 5 to
10 mph with gusts to around 15 mph.
.TUESDAY...Clear. Lows in the mid 40s. Highs in the mid 70s.
.WEDNESDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s.
$$
IDZ411-172215-
Centennial Mountains and Snake River Range/Targhee NF-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy. Slight chance of thunderstorms
in the morning. Chance of rain showers through
the day. Chance of thunderstorms in the
afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....Around 73 valleys and 62-69 ridges.
24 hr trend......4 degrees down.
* Min Humidity.......51-58 percent valleys and 57-65 percent
ridges.
24 hr trend......20 percent up.
* 20ft winds.........
Valleys/lwr slopes...East 4 to 6 mph shifting to the south 4 to
5 mph in the afternoon.
Ridges/upr slopes....East 4 to 7 mph shifting to the south 6 to
9 mph in the afternoon. Gusts up to 20
mph.
* Chc Wetting Rain...50 percent.
* Mixing Height......2500-3500 ft AGL.
* Transport Winds....Southeast around 10 mph shifting to the south
in the afternoon.
.TONIGHT...
* Sky/weather........Partly cloudy then becoming mostly cloudy.
Chance of rain showers and slight chance of
thunderstorms.
* Chc of thunder.....20 percent.
* Min Temperature....42-49.
24 hr trend......Little change.
* Max Humidity.......89-97 percent.
24 hr trend......16 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southeast 4 to 7 mph.
Ridges/upr slopes....Southeast 4 to 7 mph. Gusts up to 20 mph
in the evening.
* Chc Wetting Rain...40 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....Southeast around 10 mph.
.FRIDAY...
* Sky/weather........Mostly cloudy. Chance of rain showers in the
morning, then rain showers likely and chance
of thunderstorms in the afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....Around 70 valleys and 59-66 ridges.
24 hr trend......3 degrees down.
* Min Humidity.......55-63 percent valleys and 62-70 percent
ridges.
24 hr trend......5 percent up.
* 20ft winds.........
Valleys/lwr slopes...East around 4 mph shifting to the
southwest 4 to 5 mph in the afternoon.
Ridges/upr slopes....Southeast 4 to 6 mph shifting to the
southwest with gusts to around 15 mph in
the afternoon.
* Chc Wetting Rain...60 percent.
* Mixing Height......4750-5750 ft AGL.
* Transport Winds....South 10 to 15 mph.
.Forecast days 3 through 7......
.SATURDAY...Showers likely and chance of thunderstorms. Lows
39 to 46. Highs 53 to 60. West winds 5 to 10 mph with gusts to
around 15 mph.
.SUNDAY...Partly cloudy. Lows 37 to 44. Highs 59 to 66. Northwest
winds 5 to 10 mph with gusts to around 15 mph.
.MONDAY...Clear. Lows 37 to 44. Highs 63 to 70. South winds up to
5 mph with gusts to around 15 mph.
.TUESDAY...Clear. Lows in the lower 40s. Highs in the upper 60s.
.WEDNESDAY...Mostly clear. Lows in the lower 40s. Highs in the
upper 60s.
$$
IDZ413-172215-
Caribou Range/Caribou NF-
112 AM MDT Thu Sep 17 2026
.Today...
* Sky/weather........Mostly cloudy. Rain showers 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....72-79 valleys and 64-71 ridges.
24 hr trend......4 degrees down.
* Min Humidity.......44-52 percent valleys and 52-60 percent
ridges.
24 hr trend......10 percent up.
* 20ft winds.........
Valleys/lwr slopes...South 7 to 12 mph.
Ridges/upr slopes....South 7 to 12 mph with gusts to around 20
mph.
* Chc Wetting Rain...40 percent.
* Mixing Height......6250-7250 ft AGL.
* Transport Winds....South 10 to 15 mph.
.TONIGHT...
* Sky/weather........Partly cloudy then becoming mostly cloudy.
Chance of rain showers and slight chance of
thunderstorms through the night.
* Chc of thunder.....20 percent.
* Min Temperature....46-53.
24 hr trend......4 degrees down.
* Max Humidity.......84-92 percent.
24 hr trend......14 percent up.
* 20ft winds.........
Valleys/lwr slopes...Southeast 5 to 10 mph.
Ridges/upr slopes....Southeast 5 to 10 mph with gusts to around
15 mph.
* Chc Wetting Rain...10 percent.
* Mixing Height......300-1300 ft AGL.
* Transport Winds....South around 10 mph.
.FRIDAY...
* Sky/weather........Partly cloudy then becoming mostly cloudy.
Chance of rain in the morning, then chance of
showers and thunderstorms in the afternoon.
* Chc of thunder.....50 percent.
* Max Temperature....65-72.
24 hr trend......4 degrees down.
* Min Humidity.......50-58 percent valleys and 55-63 percent
ridges.
24 hr trend......5 percent up.
* 20ft winds.........
Valleys/lwr slopes...South 4 to 6 mph shifting to the southwest
5 to 8 mph in the afternoon.
Ridges/upr slopes....South 4 to 9 mph with gusts to around 20
mph.
* Chc Wetting Rain...40 percent.
* Mixing Height......6500-7500 ft AGL.
* Transport Winds....South 10 to 15 mph.
.Forecast days 3 through 7......
.SATURDAY...Showers likely and slight chance of thunderstorms.
Lows 40 to 47. Highs 60 to 67. Northwest winds 5 to 10 mph with
gusts to around 20 mph.
.SUNDAY...Mostly clear. Lows 39 to 46. Highs 65 to 72. North
winds 5 to 10 mph with gusts to around 15 mph.
.MONDAY...Clear. Lows 40 to 47. Highs 70 to 77. East winds 5 to
10 mph with gusts to around 15 mph.
.TUESDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s.
.WEDNESDAY...Mostly clear. Lows in the mid 40s. Highs in the mid
70s.
$$
.OUTLOOK FOR THURSDAY SEPTEMBER 24 THROUGH WEDNESDAY SEPTEMBER 30...
Above normal temperatures and precipitation.
$$