Alert archive / Idaho / Red Flag Warnings in 2021
Red Flag Warning 6, NWS Boise, ID
NWS Boise, ID issued this red flag warning at Jul 2, 2021, 1:33 PM MDT for Owyhee County, Twin Falls County, Idaho. It took effect at Jul 3, 2021, 3:00 PM MDT. It was in force for 8 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
- Jul 2, 2021, 1:33 PM MDT (19:33 UTC)
- In effect from
- Jul 3, 2021, 3:00 PM MDT
- Expired
- Jul 3, 2021, 11:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Boise, ID
Counties Owyhee County, ID, Twin Falls County, ID
The radar
The Boise radar (KCBX), 132 km from the middle of the area, began a volume at 19:35 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
Boise Airport, ID (KBOI), launched 12:00Z, 7.6 hours before the alert went out and 138 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
- 7 J/kg
- Mixed-layer CIN
- -390 J/kg
- Mixed-layer LCL
- 2795 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
961 WWUS85 KBOI 021933 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 133 PM MDT Fri Jul 2 2021 .Abundant mid level moisture pooled across Nevada is expected to push northward Saturday. This combines with daytime heating and a weak upper disturbance to bring another round of thunderstorms into the warning region. Pockets of wetting rains are possible. IDZ423-426-ORZ636-637-032100- /O.NEW.KBOI.FW.W.0006.210703T2100Z-210704T0500Z/ Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 133 PM MDT Fri Jul 2 2021 /1233 PM PDT Fri Jul 2 2021/ ...RED FLAG WARNING IN EFFECT FROM 3 PM MDT /2 PM PDT/ TO 11 PM MDT /10 PM PDT/ SATURDAY FOR LIGHTNING FOR OWYHEE MOUNTAINS... SOUTHERN HIGHLANDS...BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 423...426...636 AND 637... The National Weather Service in Boise has issued a Red Flag Warning, which is in effect from 3 PM MDT /2 PM PDT/ to 11 PM MDT /10 PM PDT/ Saturday. * THUNDERSTORMS...Increasing coverage in thunderstorms as they spread from south to the north through the afternoon and evening. * OUTFLOW WINDS...Gusts 40 to 50 mph. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
2 follow-up statements
724 WWUS85 KBOI 031954 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 154 PM MDT Sat Jul 3 2021 .Thunderstorms have formed and should continue into the evening, providing parts of the area with scattered lightning and wind gusts to 50 mph. Highest confidence is for ID423 and ID426. Another round of thunderstorms is forecast for Independence Day, and a new Red Flag Warning may be needed. IDZ423-426-ORZ636-637-040500- /O.CON.KBOI.FW.W.0006.210703T2100Z-210704T0500Z/ Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 154 PM MDT Sat Jul 3 2021 /1254 PM PDT Sat Jul 3 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM MDT /10 PM PDT/ THIS EVENING FOR LIGHTNING FOR OWYHEE MOUNTAINS... SOUTHERN HIGHLANDS...BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 423...426...636 AND 637... * THUNDERSTORMS...Increasing coverage in thunderstorms as they spread from south to the north through the afternoon and evening. * OUTFLOW WINDS...Gusts 40 to 50 mph. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
807 WWUS85 KBOI 040442 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 1042 PM MDT Sat Jul 3 2021 IDZ423-426-ORZ636-637-040545- /O.EXP.KBOI.FW.W.0006.000000T0000Z-210704T0500Z/ Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 1042 PM MDT Sat Jul 3 2021 /942 PM PDT Sat Jul 3 2021/ ...RED FLAG WARNING WILL EXPIRE AT 11 PM MDT /10 PM PDT/ THIS EVENING FOR LIGHTNING FOR OWYHEE MOUNTAINS...SOUTHERN HIGHLANDS... BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 423...426... 636 AND 637... Thunderstorms have weakened across the warned area this evening. A few showers and thunderstorms remain, though lightning coverage is no longer expected to be significant. Gusty wind to 30 mph could still accompany lingering storm activity. $$ L
The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 6:17 PM MDT | Special Weather Statement | BOI | Canyon | 43 min |
Nearby
Red Flag Warnings in Idaho, 2021Red Flag Warnings in Oregon, 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.