Alert archive / Idaho / Red Flag Warnings in 2021
Red Flag Warning 30, NWS Pocatello, ID
NWS Pocatello, ID issued this red flag warning at Sep 10, 2021, 2:47 AM MDT for 25 counties in Idaho. It took effect at Sep 10, 2021, 12:00 PM MDT. It was in force for 10 hr. 48 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 10, 2021, 2:47 AM MDT (08:47 UTC)
- In effect from
- Sep 10, 2021, 12:00 PM MDT
- Expired
- Sep 10, 2021, 10:00 PM MDT
- In force
- 10 hr
- Issued by
- NWS Pocatello, ID
All 25 counties
Bannock County, ID, Bear Lake County, ID, Bingham County, ID, Blaine County, ID, Boise County, ID, Bonneville County, ID, Butte County, ID, Caribou County, ID, Cassia County, ID, Clark County, ID, Custer County, ID, Franklin 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, Oneida County, ID, Power County, ID, Teton County, ID, Twin Falls County, ID, Valley County, ID
The radar
The Pocatello radar (KSFX), 49 km from the middle of the area, began a volume at 08:48 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 10, 1:18 PM MDT | TSTM WND GST 43 | 6 S Twin Falls, ID | ASOS STATION KTWF TWIN FALLS. |
| Sep 10, 1:45 PM MDT | TSTM WND GST 45 | 14 Ese Hollister, ID | MESONET STATION TGFI1 TRAIL GULCH. |
| Sep 10, 1:56 PM MDT | TSTM WND GST 45 | Heyburn, ID | ASOS STATION KBYI BURLEY MUNICIPAL AIRPORT. |
| Sep 10, 1:58 PM MDT | TSTM WND GST 49 | 1 S Almo, ID | MESONET STATION RCKI1 1 S ALMO. |
| Sep 10, 2:06 PM MDT | TSTM WND GST 56 | 3 E Jerome, ID | AWOS STATION KJER JEROME COUNTY. |
| Sep 10, 2:13 PM MDT | TSTM WND GST 45 | 6 S Twin Falls, ID | ASOS STATION KTWF TWIN FALLS. |
| Sep 10, 2:15 PM MDT | TSTM WND DMG | 2 Sw Minidoka, ID | POWER OUTAGE REPORTED IN THE AREA WITH OVER 100 CUSTOMERS IMPACTED. GUSTS NEAR 50MPH WERE IN THE AREA AT THE TIME. TIME ESTIMATED BY RADAR. |
| Sep 10, 2:15 PM MDT | TSTM WND GST 56 | 8 Nnw Idahome, ID | ITD12 YALE STATION. |
| Sep 10, 2:15 PM MDT | TSTM WND GST 60 | 6 Nw Minidoka, ID | MESONET STATION MIN 6 NW MINIDOKA. |
| Sep 10, 2:39 PM MDT | TSTM WND GST 44 | 4 Ese Basin, ID | MESONET STATION TR257 SAWTOOTH PORTABLE NO. 1. |
| Sep 10, 2:50 PM MDT | TSTM WND GST 50 | 1 Ene Richfield, ID | MESONET STATION RIC 1 ENE RICHFIELD. |
| Sep 10, 3:05 PM MDT | TSTM WND DMG | 1 Wsw Bellevue, ID | MULTIPLE LARGE COTTONWOOD TREES DOWN. TIME ESTIMATED VIA RADAR. |
| Sep 10, 3:06 PM MDT | TSTM WND DMG | Hailey, ID | OVER 1000 CUSTOMERS WITHOUT POWER DUE TO STRONG THUNDERSTORM WINDS IN THE AREA. MEASURED REPORTS OF AROUND 50MPH. TIME ESTIMATED VIA RADAR. |
| Sep 10, 3:06 PM MDT | TSTM WND GST 51 | 1 Se Hailey, ID | AWOS STATION KSUN HAILEY FRIEDMAN AIRPORT. |
| Sep 10, 3:15 PM MDT | TSTM WND GST 50 | 20 Ese Craters Of Moon, ID | MESONET STATION BIG COXS WELL. |
| Sep 10, 3:20 PM MDT | TSTM WND GST 65 | 11 Wsw Atomic City, ID | MESONET STATION SUM BIG SOUTHERN SUMMIT. |
| Sep 10, 3:25 PM MDT | TSTM WND GST 45 | 1 S Michaud, ID | ASOS STATION KPIH POCATELLO REGIONAL AIRPORT. |
| Sep 10, 3:35 PM MDT | TSTM WND GST 60 | 8 Nnw Atomic City, ID | MESONET STATION PBF INL CRITICAL INFRASTRUCTURE. |
| Sep 10, 3:40 PM MDT | TSTM WND DMG | 4 Ese Rupert, ID | IRRIGATION WHEEL LINE BLOWN ACROSS THE ROAD AND INTO THE NEXT FIELD. TIME ESTIMATED VIA RADAR. |
| Sep 10, 3:44 PM MDT | TSTM WND GST 65 | 6 S Sun Valley, ID | MESONET STATION OHOI1 6 S SUN VALLEY OHIO GULCH. |
| Sep 10, 3:50 PM MDT | TSTM WND GST 70 | 10 Sse Howe, ID | MESONET STATION NRF INL NAVAL REACTORS FACILITY. |
| Sep 10, 4:00 PM MDT | TSTM WND GST 60 | 9 Ssw Mud Lake, ID | MESONET STATION ROV 9 SSW MUD LAKE. |
| Sep 10, 4:00 PM MDT | TSTM WND GST 65 | 18 W Osgood, ID | ITD99 KETTLE BUTTE HWY-20. |
| Sep 10, 4:05 PM MDT | TSTM WND GST 60 | 9 Ssw Mud Lake, ID | MESONET STATION ROV 9 SSW MUD LAKE. |
| Sep 10, 4:14 PM MDT | TSTM WND GST 55 | 2 Nw Idaho Falls, ID | ASOS STATION KIDA IDAHO FALLS REGIONAL AIRPORT. |
| Sep 10, 4:15 PM MDT | TSTM WND GST 60 | 1 Ne Terreton, ID | MESONET STATION TER 1 NE TERRETON. |
| Sep 10, 4:20 PM MDT | TSTM WND GST 60 | 12 Se Butte City, ID | MESONET STATION RWM INL RADIOACTIVE WASTE MGMT. |
| Sep 10, 4:39 PM MDT | TSTM WND GST 55 | 9 W Black Pine, ID | MESONET STATION MOFI1 MOBURG CANYON. |
| Sep 10, 4:47 PM MDT | TSTM WND GST 45 | 17 W Aberdeen, ID | MESONET STATION CYFI1 17 W ABERDEEN. |
| Sep 10, 4:50 PM MDT | TSTM WND GST 50 | 5 Nne Dubois, ID | MESONET STATION DUB 5 NNE DUBOIS. |
| Sep 10, 4:50 PM MDT | TSTM WND GST 60 | 1 N Roberts, ID | MESONET STATION ROB 1 N ROBERTS. |
| Sep 10, 5:00 PM MDT | TSTM WND GST 43 | 1 E Gilmore, ID | |
| Sep 10, 5:00 PM MDT | TSTM WND GST 60 | 18 Nne Berenice, ID | MESONET STATION BLU BLUE DOME. |
| Sep 10, 5:03 PM MDT | TSTM WND GST 45 | Challis, ID | MESONET STATION CHRI1 CHALLIS. |
| Sep 10, 5:10 PM MDT | TSTM WND GST 46 | 4 S Salmon, ID | |
| Sep 10, 5:10 PM MDT | TSTM WND GST 45 | 1 N Chubbuck, ID | |
| Sep 10, 5:12 PM MDT | TSTM WND GST 45 | 4 Ene Spencer, ID | MESONET STATION THMI1 4 ENE SPENCER. |
| Sep 10, 5:15 PM MDT | TSTM WND GST 48 | 8 Nnw Idahome, ID | ITD12 YALE STATION. |
| Sep 10, 5:26 PM MDT | TSTM WND GST 54 | 11 N Ellis, ID | EZRA CREEK RAWS STATION. |
| Sep 10, 5:45 PM MDT | TSTM WND GST 45 | 5 Sse Roberts, ID | ITD16 OSGOOD. |
| Sep 10, 5:45 PM MDT | TSTM WND GST 55 | 8 Nnw Idahome, ID | ITD YALE STATION. |
| Sep 10, 5:45 PM MDT | TSTM WND GST 59 | 1 Ene Richfield, ID | 1 ENE RICHFIELD. MESONET STATION RIC 1 ENE RICHFIELD. |
| Sep 10, 5:45 PM MDT | NON-TSTM WND GST 59 | 1 Ene Richfield, ID | MESONET STATION RIC 1 ENE RICHFIELD. |
| Sep 10, 5:55 PM MDT | TSTM WND GST 51 | 3 Se Ovid, ID | AWOS STATION K1U7 BEAR LAKE COUNTY AIRPORT. |
| Sep 10, 5:55 PM MDT | NON-TSTM WND GST 51 | 3 Se Ovid, ID | AWOS STATION K1U7 BEAR LAKE COUNTY AIRPORT. |
| Sep 10, 6:00 PM MDT | TSTM WND GST 50 | 4 Nnw Humphrey, ID | ITDB2 MONIDA. |
| Sep 10, 6:45 PM MDT | TSTM WND GST 51 | 2 Nw Pocatello, ID | F4083 APRSWXNET/CWOP. |
| Sep 10, 7:45 PM MDT | TSTM WND GST 52 | Bern, ID |
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 00:00Z, 8.8 hours before the alert went out and 250 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
- 38 J/kg
- Mixed-layer CIN
- -210 J/kg
- Mixed-layer LCL
- 4008 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
901 WWUS85 KPIH 100847 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 247 AM MDT Fri Sep 10 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR IDAHO FIRE WEATHER ZONES 410, 411, 413, 422, 425, 427, 475 AND 476... IDZ410-411-413-422-425-427-475-476-101700- /O.NEW.KPIH.FW.W.0030.210910T1800Z-210911T0400Z/ Upper Snake River Valley/Idaho Falls BLM- Centennial Mountains and Snake River Range/Targhee NF- Caribou Range/Caribou NF-Sawtooth Range/Northern Sawtooth NF- 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- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 247 AM MDT Fri Sep 10 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR IDAHO FIRE WEATHER ZONES 410, 411, 413, 422, 425, 427, 475 AND 476... The National Weather Service in Pocatello has issued a Red Flag Warning for scattered thunderstorms, which is in effect from noon today to 10 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 413 Caribou Range/Caribou NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River, Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * THUNDERSTORMS...Scattered thunderstorms will develop by mid afternoon and continue into the evening hours. * OUTFLOW WINDS...Gusty, erratic outflow winds up to 50 mph are possible near thunderstorms. 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. && $$
2 follow-up statements
648 WWUS85 KPIH 102041 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 241 PM MDT Fri Sep 10 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR IDAHO FIRE WEATHER ZONES 410, 411, 413, 422, 425, 427, 475 AND 476... IDZ410-411-413-422-425-427-475-476-110400- /O.CON.KPIH.FW.W.0030.000000T0000Z-210911T0400Z/ Upper Snake River Valley/Idaho Falls BLM- Centennial Mountains and Snake River Range/Targhee NF- Caribou Range/Caribou NF-Sawtooth Range/Northern Sawtooth NF- 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- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 241 PM MDT Fri Sep 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 411, 413, 422, 425, 427, 475 AND 476... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 411 Centennial Mountains and Snake River Range/Targhee NF, Fire Weather Zone 413 Caribou Range/Caribou NF, Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF, Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River, Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River, Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * THUNDERSTORMS...Scattered thunderstorms will develop by mid afternoon and continue into the evening hours. * OUTFLOW WINDS...Gusty, erratic outflow winds up to 50 mph are possible near thunderstorms. 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. && $$
366 WWUS85 KPIH 110337 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 937 PM MDT Fri Sep 10 2021 IDZ410-411-413-422-425-427-475-476-110445- /O.EXP.KPIH.FW.W.0030.000000T0000Z-210911T0400Z/ Upper Snake River Valley/Idaho Falls BLM- Centennial Mountains and Snake River Range/Targhee NF- Caribou Range/Caribou NF-Sawtooth Range/Northern Sawtooth NF- 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- East Salmon River Mountains/Salmon NF- Lemhi and Lost River Range/Challis NF- 937 PM MDT Fri Sep 10 2021 ...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING FOR SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 411, 413, 422, 425, 427, 475 AND 476... Thunderstorm coverage has decreased across East Idaho. Therefore the Red Flag Warning will expire at 10 PM MDT. Cooler temperatures and higher humidities are expected Saturday, with locally breezy afternoon winds. $$
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 2:26 PM MDT | Special Weather Statement | PIH | Minidoka | 34 min |
| Sep 10, 2:50 PM MDT | Special Weather Statement | PIH | Bingham, Power | 25 min |
| Sep 10, 3:09 PM MDT | Special Weather Statement | PIH | Blaine | 36 min |
| Sep 10, 3:15 PM MDT | Special Weather Statement | PIH | Bannock, Bingham, Jefferson, Power | 45 min |
| Sep 10, 3:18 PM MDT | Special Weather Statement | PIH | Blaine, Lincoln, Minidoka | 27 min |
| Sep 10, 3:45 PM MDT | Special Weather Statement | PIH | Blaine, Butte, Custer, Minidoka | 30 min |
| Sep 10, 4:00 PM MDT | Severe Thunderstorm Warning | PIH | Butte, Clark, Fremont, Jefferson, Madison | 30 min |
| Sep 10, 4:04 PM MDT | Special Weather Statement | PIH | Bingham | 26 min |
| Sep 10, 4:16 PM MDT | Special Weather Statement | PIH | Butte | 29 min |
| Sep 10, 4:21 PM MDT | Special Weather Statement | PIH | Butte | 24 min |
| Sep 10, 4:23 PM MDT | Severe Thunderstorm Warning | PIH | Power | 24 min |
| Sep 10, 4:28 PM MDT | Severe Thunderstorm Warning | PIH | Clark, Fremont, Jefferson | 14 min |
| Sep 10, 4:34 PM MDT | Special Weather Statement | PIH | Bonneville, Jefferson, Madison | 26 min |
| Sep 10, 4:42 PM MDT | Special Weather Statement | PIH | Butte | 33 min |
| Sep 10, 4:46 PM MDT | Special Weather Statement | PIH | Power | 29 min |
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.