Alert archive / Idaho / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Pocatello, ID
NWS Pocatello, ID issued this red flag warning at Jun 9, 2021, 3:27 AM MDT for Cassia County, Twin Falls County, Idaho. It took effect at Jun 9, 2021, 12:00 PM MDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 9, 2021, 3:27 AM MDT (09:27 UTC)
- In effect from
- Jun 9, 2021, 12:00 PM MDT
- Expired
- Jun 9, 2021, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Pocatello, ID
Counties Cassia County, ID, Twin Falls County, ID
The radar
The Pocatello radar (KSFX), 147 km from the middle of the area, began a volume at 09:31 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.
The nearest sounding before it
Elko, NV (KLKN), launched 00:00Z, 9.5 hours before the alert went out and 161 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
- 19 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 3527 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
454 WWUS85 KPIH 090927 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 327 AM MDT Wed Jun 9 2021 IDZ427-100300- /O.NEW.KPIH.FW.W.0001.210609T1800Z-210610T0300Z/ Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 327 AM MDT Wed Jun 9 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427 BELOW 6000 FEET MSL... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from noon today to 9 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...South winds increasing to 15 to 25 mph with gusts up to 35 mph this afternoon. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Strong winds and low humidity coupled with dry fuels can create critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains. && $$
2 follow-up statements
201 WWUS85 KPIH 092026 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 226 PM MDT Wed Jun 9 2021 IDZ427-100300- /O.CON.KPIH.FW.W.0001.000000T0000Z-210610T0300Z/ Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 226 PM MDT Wed Jun 9 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427 BELOW 6000 FEET MSL... * AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...South winds increasing to 15 to 25 mph with gusts up to 35 mph this afternoon. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Strong winds and low humidity coupled with dry fuels can create critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains. && Messick $$
087 WWUS85 KPIH 100252 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 852 PM MDT Wed Jun 9 2021 IDZ427-100400- /O.EXP.KPIH.FW.W.0001.000000T0000Z-210610T0300Z/ Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 852 PM MDT Wed Jun 9 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427... Low humidity and gusty south winds may remain in criteria at some locations for another hour or so. But expect temperatures to cool substantially rising humidity. Winds will shift to west around midnight after a cold front moves through the region. Gusty winds will continue through Thursday but humidity will be substantially elevated. $$
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 3:34 AM MDT | Wind Advisory | PIH | Bannock, Bingham, Blaine, Bonneville, Butte, Cassia and 6 more | 40 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.