Alert archive / Idaho / Red Flag Warnings in 2021
Red Flag Warning 33, NWS Pocatello, ID
NWS Pocatello, ID issued this red flag warning at Sep 16, 2021, 1:35 PM MDT for 20 counties in Idaho. It took effect at Sep 17, 2021, 1:00 PM MDT. It was in force for 32 hr. 41 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 16, 2021, 1:35 PM MDT (19:35 UTC)
- In effect from
- Sep 17, 2021, 1:00 PM MDT
- Expired
- Sep 18, 2021, 9:00 PM MDT
- In force
- 32 hr
- Issued by
- NWS Pocatello, ID
Counties Bingham County, ID, Blaine County, ID, Boise County, ID, Bonneville County, ID, Butte County, ID, Cassia County, ID, Clark County, ID, Custer County, ID, Fremont County, ID, Idaho County, ID, Jefferson County, ID, Jerome County, ID, Lemhi County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Power County, ID, Teton County, ID, Twin Falls County, ID, Valley County, ID
The radar
The Pocatello radar (KSFX), 86 km from the middle of the area, began a volume at 19:36 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 18, 6:40 AM MDT | NON-TSTM WND GST 50 | 11 Wsw Atomic City, ID | MESONET STATION SUM BIG SOUTHERN BUTTE. |
| Sep 18, 12:26 PM MDT | NON-TSTM WND GST 41 | 11 N Ellis, ID | MESONET STATION EZRI1 EZRA CREEK. |
| Sep 18, 12:45 PM MDT | NON-TSTM WND GST 42 | 14 Ese Hollister, ID | MESONET STATION TGFI1 TRAIL GULCH. |
| Sep 18, 1:08 PM MDT | NON-TSTM WND GST 46 | 2 Nw Idaho Falls, ID | ASOS STATION KIDA IDAHO FALLS REGIONAL AIRPORT. |
| Sep 18, 1:26 PM MDT | NON-TSTM WND GST 46 | 11 N Ellis, ID | MESONET STATION EZRI1 EZRA CREEK. |
| Sep 18, 2:30 PM MDT | NON-TSTM WND GST 50 | Atomic City, ID | MESONET STATION ATO ATOMIC CITY. |
| Sep 18, 2:33 PM MDT | NON-TSTM WND GST 40 | 1 S Mccall, ID | ASOS STATION KMYL MCCALL. |
| Sep 18, 2:35 PM MDT | NON-TSTM WND GST 40 | 4 S Salmon, ID | KSMN AIRPORT AWOS. |
| Sep 18, 2:45 PM MDT | NON-TSTM WND GST 55 | 17 Wnw Custer, ID | MESONET STATION TT032 IRAWS 1. |
| Sep 18, 2:50 PM MDT | NON-TSTM WND GST 44 | 3 Sw Salmon, ID | SALMON RAWS. |
| Sep 18, 2:52 PM MDT | NON-TSTM WND GST 44 | 15 E Mackay Bar, ID | LODGEPOLE RAWS. |
| Sep 18, 3:00 PM MDT | NON-TSTM WND GST 46 | 4 Wsw Galena, ID | MESONET STATION SVT 3.8 W GALENA (UUNET). |
| Sep 18, 3:00 PM MDT | NON-TSTM WND GST 48 | 9 Ssw Mud Lake, ID | MESONET STATION ROV 9 SSW MUD LAKE. |
| Sep 18, 3:00 PM MDT | NON-TSTM WND GST 49 | 1 Ne Aberdeen, ID | MESONET STATION ABE 1 NE ABERDEEN. |
| Sep 18, 3:07 PM MDT | TSTM WND GST 54 | 2 Nw Idaho Falls, ID | ASOS STATION KIDA IDAHO FALLS REGIONAL AIRPORT. |
| Sep 18, 3:10 PM MDT | NON-TSTM WND GST 45 | 3 W Taber, ID | MESONET STATION TAB 3 W TABER. |
| Sep 18, 3:15 PM MDT | NON-TSTM WND GST 45 | 1 Nnw Craters Of Moon, ID | MESONET STATION CRA 1 NNW CRATERS OF THE MOON. |
| Sep 18, 3:20 PM MDT | TSTM WND GST 58 | 1 S Michaud, ID | POCATELLO REGIONAL AIRPORT. CONVECTIVE OUTFLOW WINDS. |
| Sep 18, 3:20 PM MDT | TSTM WND GST 59 | 1 S Michaud, ID | POCATELLO REGIONAL AIRPORT. CONVECTIVE OUTFLOW WINDS. GUST CORRECTED FROM 58 MPH TO 59 MPH. |
| Sep 18, 3:20 PM MDT | NON-TSTM WND GST 45 | 9 E Butte City, ID | MESONET STATION DEA DEAD MAN CANYON. |
| Sep 18, 3:30 PM MDT | NON-TSTM WND GST 46 | 1 Nnw Craters Of Moon, ID | MESONET STATION CRA 1 NNW CRATERS OF THE MOON. |
| Sep 18, 3:35 PM MDT | NON-TSTM WND GST 46 | 11 Wsw Monteview, ID | MESONET STATION LOF INL SPECIFIC MANUFACTURING. |
| Sep 18, 3:45 PM MDT | NON-TSTM WND GST 48 | 18 Nne Berenice, ID | MESONET STATION BLU BLUE DOME. |
| Sep 18, 3:50 PM MDT | NON-TSTM WND GST 45 | 9 E Butte City, ID | MESONET STATION DEA DEAD MAN CANYON. |
| Sep 18, 4:00 PM MDT | TSTM WND GST 52 | 1 Ese Palisades, ID | RWIS ITDE1. US-26 AT PALISADES RESERVOIR. DECAYING THUNDERSTORM OUTFLOW. |
| Sep 18, 4:00 PM MDT | NON-TSTM WND GST 46 | 11 W Osgood, ID | MESONET STATION KET KETTLE BUTTE. |
| Sep 18, 4:00 PM MDT | NON-TSTM WND GST 48 | 1 Nnw Craters Of Moon, ID | MESONET STATION CRA 1 NNW CRATERS OF THE MOON. |
| Sep 18, 4:05 PM MDT | NON-TSTM WND GST 45 | 7 S Howe, ID | MESONET STATION BAS BASE OF HOWE PEAK. |
| Sep 18, 4:08 PM MDT | NON-TSTM WND GST 41 | 4 Ssw Horseshoe Bend, ID | MESONET STATION EW2058 HORSESHOE BEND. |
| Sep 18, 4:09 PM MDT | NON-TSTM WND GST 48 | 17 Wsw Marion, ID | MESONET STATION CRII1 COTTON RIDGE. |
| Sep 18, 4:10 PM MDT | NON-TSTM WND GST 45 | 9 E Butte City, ID | MESONET STATION DEA DEAD MAN CANYON. |
| Sep 18, 4:18 PM MDT | NON-TSTM WND GST 41 | 4 Ssw Horseshoe Bend, ID | MESONET STATION EW2058 HORSESHOE BEND. |
| Sep 18, 4:20 PM MDT | NON-TSTM WND GST 52 | 13 Ne Atomic City, ID | MESONET STATION EBR INL MATERIALS FUELS COMPLEX. |
| Sep 18, 4:25 PM MDT | NON-TSTM WND GST 47 | 2 Nne Sugar City, ID | MESONET STATION SUG 2 NNE SUGAR CITY. |
| Sep 18, 4:25 PM MDT | NON-TSTM WND GST 50 | 1 Nnw Craters Of Moon, ID | MESONET STATION CRA 1 NNW CRATERS OF THE MOON. |
| Sep 18, 4:45 PM MDT | NON-TSTM WND GST 49 | 14 Ese Hollister, ID | MESONET STATION TGFI1 TRAIL GULCH. |
| Sep 18, 4:51 PM MDT | NON-TSTM WND GST 56 | 6 Se North Fork, ID | MESONET STATION KRCI1 KRILEY CREEK RAWS. |
| Sep 18, 5:51 PM MDT | NON-TSTM WND GST 60 | 6 Se North Fork, ID | MESONET STATION KRCI1 KRILEY CREEK RAWS. |
| Sep 18, 6:48 PM MDT | NON-TSTM WND GST 48 | 6 E Yellowjacket, ID | MESONET STATION BAEI1 RED ROCK PEAK. |
| Sep 18, 6:51 PM MDT | NON-TSTM WND GST 43 | 11 Wsw Shoup, ID | MESONET STATION SKFI1 SKULL GULCH. |
| Sep 18, 6:55 PM MDT | NON-TSTM WND GST 58 | 6 S Twin Falls, ID | ASOS STATION KTWF TWIN FALLS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 7.6 hours before the alert went out and 224 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2777 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -168 m²/s²
- 0-3 km storm-relative helicity
- -80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
014 WWUS85 KPIH 161935 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 135 PM MDT Thu Sep 16 2021 IDZ425-171100- /O.NEW.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ /O.CON.KPIH.FW.W.0032.210916T2000Z-210917T0200Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- 135 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 425... ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 425... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 1 PM to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ411-422-475-476-171100- /O.NEW.KPIH.FW.W.0033.210917T1900Z-210919T0300Z/ Centennial Mountains and Snake River Range/Targhee NF- Sawtooth Range/Northern Sawtooth NF- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 135 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 411, 422, 475 AND 476... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 1 PM Friday to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ410-171100- /O.NEW.KPIH.FW.W.0033.210917T1900Z-210919T0300Z/ Upper Snake River Valley/Idaho Falls BLM- 135 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 410... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 1 PM Friday to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ427-171100- /O.NEW.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 135 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 427... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 1 PM to 9 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...Southwest 20 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$
5 follow-up statements
242 WWUS85 KPIH 170147 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 747 PM MDT Thu Sep 16 2021 ...TODAY'S RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 425... ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410, 411, 422, 475 AND 476... ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 425 AND 427... IDZ425-171100- /O.EXP.KPIH.FW.W.0032.000000T0000Z-210917T0200Z/ /O.CON.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- 747 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 425... * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ411-422-475-476-171100- /O.CON.KPIH.FW.W.0033.210917T1900Z-210919T0300Z/ Centennial Mountains and Snake River Range/Targhee NF- Sawtooth Range/Northern Sawtooth NF- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 747 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 411, 422, 475 AND 476... * AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ410-171100- /O.CON.KPIH.FW.W.0033.210917T1900Z-210919T0300Z/ Upper Snake River Valley/Idaho Falls BLM- 747 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 410... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ427-171100- /O.CON.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 747 PM MDT Thu Sep 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427... * AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...Southwest 20 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$
645 WWUS85 KPIH 170836 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 236 AM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410, 411, 422, 475 AND 476... ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 425 AND 427... IDZ411-422-475-476-180300- /O.CON.KPIH.FW.W.0033.210917T1900Z-210919T0300Z/ Centennial Mountains and Snake River Range/Targhee NF- Sawtooth Range/Northern Sawtooth NF- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 236 AM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 411, 422, 475 AND 476... * AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ410-180300- /O.CON.KPIH.FW.W.0033.210917T1900Z-210919T0300Z/ Upper Snake River Valley/Idaho Falls BLM- 236 AM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 410... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ425-427-180300- /O.CON.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 236 AM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427... * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...Southwest 20 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && Messick $$
827 WWUS85 KPIH 171936 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 136 PM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM FRIDAY TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 410, 411, 422, 475 AND 476... ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 425 AND 427... IDZ411-422-475-476-181200- /O.CON.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Centennial Mountains and Snake River Range/Targhee NF- Sawtooth Range/Northern Sawtooth NF- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 136 PM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 411, 422, 475 AND 476... * AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ410-181200- /O.CON.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Upper Snake River Valley/Idaho Falls BLM- 136 PM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 410... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM. * WINDS...South 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && $$ IDZ425-427-181200- /O.CON.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 136 PM MDT Fri Sep 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 425 AND 427... * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies. && Messick $$
188 WWUS85 KPIH 180741 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 141 AM MDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 410, 411, 422, 475 AND 476... ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM TO 9 PM MDT SATURDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 425 AND 427... IDZ411-422-475-476-190300- /O.CON.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Centennial Mountains and Snake River Range/Targhee NF- Sawtooth Range/Northern Sawtooth NF- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 141 AM MDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT TODAY 1 PM TO 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 411, 422, 475 AND 476... * AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. In heavier fuels, fire intensity will be greater. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. && $$ IDZ410-190300- /O.CON.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Upper Snake River Valley/Idaho Falls BLM- 141 AM MDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT TODAY FROM 1 PM UNTIL 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONE 410... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM. * WINDS...South 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. && $$ IDZ425-427-190300- /O.CON.KPIH.FW.W.0033.210918T1900Z-210919T0300Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 141 AM MDT Sat Sep 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR IDAHO FIRE WEATHER ZONES 425 AND 427... * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Should a fire get established, expect rapid fire spread rates. In heavier fuels, expect more intense fire activity. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. && Messick $$
406 WWUS85 KPIH 190256 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 856 PM MDT Sat Sep 18 2021 IDZ411-422-475-476-190400- /O.EXP.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Centennial Mountains and Snake River Range/Targhee NF- Sawtooth Range/Northern Sawtooth NF- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 856 PM MDT Sat Sep 18 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 411, 422, 475 AND 476... Humidity has risen above 15 percent. Will continue to see some gusty winds through Sunday with the elevated humidity. $$ IDZ410-190400- /O.EXP.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Upper Snake River Valley/Idaho Falls BLM- 856 PM MDT Sat Sep 18 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 410... Humidity has risen above 15 percent. Will continue to see some gusty winds through Sunday with the elevated humidity. $$ IDZ425-427-190400- /O.EXP.KPIH.FW.W.0033.000000T0000Z-210919T0300Z/ Middle Snake River Valley/Twin Falls BLM north of the Snake River- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 856 PM MDT Sat Sep 18 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 425 AND 427... Humidity has risen above 15 percent. Will continue to see some gusty winds through Sunday with the elevated humidity. $$
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 2:59 AM MDT | Red Flag Warning | PIH | Blaine, Butte, Jerome, Lincoln, Minidoka, Power | 17 hr |
Nearby
Red Flag Warnings in Idaho, 2021Every red flag warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.