Alert archive / Idaho / Red Flag Warnings in 2021
Red Flag Warning 16, NWS Pocatello, ID
NWS Pocatello, ID issued this red flag warning at Jul 13, 2021, 1:05 AM MDT for 22 counties in Idaho. It took effect at Jul 13, 2021, 12:00 PM MDT. It was in force for 10 hr. 3 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
- Jul 13, 2021, 1:05 AM MDT (07:05 UTC)
- In effect from
- Jul 13, 2021, 12:00 PM MDT
- Expired
- Jul 13, 2021, 9:38 PM MDT
- In force
- 10 hr
- Issued by
- NWS Pocatello, ID
All 22 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, Jefferson County, ID, Jerome County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Oneida County, ID, Power County, ID, Teton County, ID, Twin Falls County, ID
The radar
The Pocatello radar (KSFX), 16 km from the middle of the area, began a volume at 07:06 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 |
|---|---|---|---|
| Jul 13, 5:43 PM MDT | HAIL 1 | Ashton, ID | NORTHWEST EDGE OF ASHTON. TIME ESTIMATED BASED ON RADAR. |
| Jul 13, 5:45 PM MDT | HAIL 1.5 | Ashton, ID | NEAR THE INTERSECTION OF 10TH ST AND ID-47. PHOTOS AND VIDEOS SUBMITTED VIA SOCIAL MEDIA WITH LARGEST STONES ESTIMATED AT PING PONG BALL SIZE. ADDITIONAL PUBLIC REPORT/PHOTO OF QUARTER TO HALF DOLLAR SIZE HAIL SEVERAL BLOCKS AWAY. TIME ESTIMATED BASED ON RADAR |
| Jul 13, 5:56 PM MDT | HAIL 1 | 1 E Ashton, ID | DIME TO QUARTER SIZE HAIL REPORTED. |
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, 7.1 hours before the alert went out and 274 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
- 4084 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
314 WWUS85 KPIH 130705 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 105 AM MDT Tue Jul 13 2021 IDZ410-413-425-427-132100- /O.UPG.KPIH.FW.A.0006.210713T1800Z-210714T0400Z/ /O.NEW.KPIH.FW.W.0016.210713T1800Z-210714T0400Z/ Upper Snake River Valley/Idaho Falls BLM-Caribou Range/Caribou 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- 105 AM MDT Tue Jul 13 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY AND HAINES OF 6 FOR FIRE WEATHER ZONES 410, 413, 425 AND 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 noon today to 10 PM MDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, Fire Weather Zone 413 Caribou Range/Caribou NF, 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...West 10 to 25 mph with gusts up to 25 to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Gusty winds and low humidity and Haines of 6 will likely create hazardous 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 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. - A Haines index of 6 means a high potential for an existing fire to become large or exhibit erratic fire behavior. && $$ IDZ422-132100- /O.NEW.KPIH.FW.W.0016.210713T1800Z-210714T0400Z/ Sawtooth Range/Northern Sawtooth NF- 105 AM MDT Tue Jul 13 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY AND A HAINES OF 6 FOR FIRE WEATHER ZONE 422... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from noon today to 10 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 422 Sawtooth Range/Northern Sawtooth NF. * WINDS...West 10 to 18 mph with gusts up to 25 to 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Gusty winds and low humidity and Haines of 6 will likely create hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A red flag warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains. - A Haines index of 6 means a high potential for an existing fire to become large or exhibit erratic fire behavior. && $$
2 follow-up statements
686 WWUS85 KPIH 131950 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 150 PM MDT Tue Jul 13 2021 IDZ410-413-422-425-427-140400- /O.CON.KPIH.FW.W.0016.000000T0000Z-210714T0400Z/ Upper Snake River Valley/Idaho Falls BLM-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- 150 PM MDT Tue Jul 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY AND HAINES OF 6 FOR FIRE WEATHER ZONES 410, 413, 422, 425 AND 427... * AFFECTED AREA...Fire Weather Zone 410 Upper Snake River Valley/Idaho Falls BLM, 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 and Fire Weather Zone 427 Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Gusty winds and low humidity and Haines of 6 will likely create hazardous 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 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. - A Haines index of 6 means a high potential for an existing fire to become large or exhibit erratic fire behavior. && $$
304 WWUS85 KPIH 140338 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 938 PM MDT Tue Jul 13 2021 IDZ410-413-422-425-427-140445- /O.CAN.KPIH.FW.W.0016.000000T0000Z-210714T0400Z/ Upper Snake River Valley/Idaho Falls BLM-Caribou Range/Caribou NF- Sawtooth Range/Northern Sawtooth NF- Middle Snake River Valley/Twin Falls BLM north of the Snake River- Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River- 938 PM MDT Tue Jul 13 2021 ...RED FLAG WARNING IS CANCELED FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410, 413, 422, 425 AND 427... The National Weather Service in Pocatello has cancelled the Red Flag Warning. Humidity readings or wind gusts observed in the affected are have gone below critical thresholds. The Red Flag Warning has been canceled. $$ jam
The office that day
Everything else NWS Pocatello, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 2:15 AM MDT | Lake Wind Advisory | PIH | Bannock, Bingham, Power | 19 hr |
| Jul 13, 5:48 PM MDT | Special Weather Statement | PIH | Fremont | 42 min |
| Jul 13, 5:56 PM MDT | Severe Thunderstorm Warning | PIH | Fremont, Teton | 28 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.