Alert archive / Idaho / Red Flag Warnings in 2021
Red Flag Warning 5, NWS Boise, ID
NWS Boise, ID issued this red flag warning at Jun 30, 2021, 2:07 PM MDT for 8 counties in Idaho. It took effect at Jul 1, 2021, 2:00 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 30, 2021, 2:07 PM MDT (20:07 UTC)
- In effect from
- Jul 1, 2021, 2:00 PM MDT
- Expired
- Jul 1, 2021, 11:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Boise, ID
Counties Boise County, ID, Camas County, ID, Elmore County, ID, Gem County, ID, Idaho County, ID, Owyhee County, ID, Twin Falls County, ID, Valley County, ID
The radar
The Boise radar (KCBX), 66 km from the middle of the area, began a volume at 20:08 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, 8.1 hours before the alert went out and 59 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
- 21 J/kg
- Mixed-layer CIN
- -358 J/kg
- Mixed-layer LCL
- 3059 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- -20 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
141 WWUS85 KBOI 302007 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 207 PM MDT Wed Jun 30 2021 ...An increasing threat of thunderstorms late this afternoon across Burns BLM... ...Thunderstorm threat increases Thursday... .An upper low over Utah drifts northward Thursday bringing additional moisture into the region. This should bring an increasing coverage of thunderstorms to the Nevada border region and northward towards Burns. some wetting rains are possible as these storms are expected to be slow moving due to the weak transport winds aloft. ORZ636-011700- /O.NEW.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ /O.CON.KBOI.FW.W.0004.210630T2200Z-210701T0600Z/ Burns BLM- 107 PM PDT Wed Jun 30 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO 11 PM PDT THIS EVENING FOR LIGHTNING FOR BURNS BLM...WHICH IS FIRE WEATHER ZONE 636... ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 10 PM PDT THURSDAY FOR LIGHTNING... The National Weather Service in Boise has issued a Red Flag Warning, which is in effect from 1 PM to 10 PM PDT Thursday. * THUNDERSTORMS...Scattered thunderstorms expected by late this afternoon and through the evening hours. Another round of thunderstorms is expected for Thursday. * OUTFLOW WINDS...Up to 40 mph possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ IDZ423-426-ORZ637-011700- /O.NEW.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Owyhee Mountains-Southern Highlands-Vale BLM- 207 PM MDT Wed Jun 30 2021 /107 PM PDT Wed Jun 30 2021/ ...RED FLAG WARNING IN EFFECT FROM 2 PM MDT /1 PM PDT/ TO 11 PM MDT /10 PM PDT/ THURSDAY FOR ABUNDANT LIGHTNING. THIS IS FOR OREGON ZONES 637 ALONG WITH IDAHO FIRE ZONES 423 AND 426 The National Weather Service in Boise has issued a Red Flag Warning, which is in effect from 2 PM MDT /1 PM PDT/ to 11 PM MDT /10 PM PDT/ Thursday. * THUNDERSTORMS...Scattered thunderstorms developing by late in the afternoon. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
5 follow-up statements
809 WWUS85 KBOI 011422 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 822 AM MDT Thu Jul 1 2021 .Abundant moisture is expected to combine with a weak upper low that has been drifting northward the last few days to help trigger abundant lightning across the warning area. These cells are expected to be slow moving and therefore bring better chances of wetting rains, especially under the thunderstorm core. Outside of the core, conditions could be more problematic. IDZ403-421-012300- /O.EXA.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Northern Boise National Forest- Southern Boise National Forest/Western Sawtooth National Forest- 822 AM MDT Thu Jul 1 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 11 PM MDT THIS EVENING FOR LIGHTNING FOR NORTHERN BOISE NATIONAL FOREST AND SOUTHERN BOISE NATIONAL FOREST/WESTERN SAWTOOTH NATIONAL FOREST...WHICH ARE FIRE WEATHER ZONES 403 AND 421... The National Weather Service in Boise has issued a Red Flag Warning, which is in effect from 2 PM this afternoon to 11 PM MDT this evening. * THUNDERSTORMS...Scattered thunderstorms developing by late in the afternoon. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ IDZ423-426-ORZ636-637-012300- /O.CON.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 822 AM MDT Thu Jul 1 2021 /722 AM PDT Thu Jul 1 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM MDT /1 PM PDT/ THIS AFTERNOON TO 11 PM MDT /10 PM PDT/ THIS EVENING FOR LIGHTNING FOR OWYHEE MOUNTAINS...SOUTHERN HIGHLANDS...BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 423...426...636 AND 637... * THUNDERSTORMS...Scattered thunderstorms developing by late in the afternoon. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
711 WWUS85 KBOI 011748 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 1148 AM MDT Thu Jul 1 2021 .Abundant moisture is expected to combine with a weak upper low that has been drifting northward the last few days to help trigger abundant lightning across the warning area. These cells are expected to be slow moving and therefore bring better chances of wetting rains, especially under the thunderstorm core. Outside of the core, conditions could be more problematic. IDZ402-020000- /O.EXA.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Eastern Payette National Forest- 1148 AM MDT Thu Jul 1 2021 ...RED FLAG WARNING IN EFFECT UNTIL 11 PM MDT THIS EVENING FOR LIGHTNING FOR NORTHERN BOISE NATIONAL FOREST AND SOUTHERN BOISE NATIONAL FOREST/WESTERN SAWTOOTH NATIONAL FOREST...WHICH ARE FIRE WEATHER ZONES 403 AND 421... The National Weather Service in Boise has issued a Red Flag Warning, which is in effect until 11 PM MDT this evening. * THUNDERSTORMS...Scattered thunderstorms developing by late in the afternoon. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ IDZ403-421-423-426-ORZ636-637-020000- /O.CON.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Northern Boise National Forest- Southern Boise National Forest/Western Sawtooth National Forest- Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 1148 AM MDT Thu Jul 1 2021 /1048 AM PDT Thu Jul 1 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM MDT /10 PM PDT/ THIS EVENING FOR LIGHTNING FOR OWYHEE MOUNTAINS...SOUTHERN HIGHLANDS...BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 423...426...636 AND 637... * THUNDERSTORMS...Scattered thunderstorms developing by late in the afternoon. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
869 WWUS85 KBOI 011950 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 150 PM MDT Thu Jul 1 2021 IDZ402-403-421-423-426-ORZ636-637-020500- /O.CON.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Eastern Payette National Forest-Northern Boise National Forest- Southern Boise National Forest/Western Sawtooth National Forest- Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 150 PM MDT Thu Jul 1 2021 /1250 PM PDT Thu Jul 1 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...Scattered thunderstorms are expected to continue into the evening hours. Pockets of wetting rains are probable, but outside the core very little rain is expected. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
873 WWUS85 KBOI 011955 CCA RFWBOI URGENT - FIRE WEATHER MESSAGE...CORRECTED National Weather Service Boise ID 155 PM MDT Thu Jul 1 2021 ...corrected to add the National Forest zones into the warning... IDZ402-403-421-423-426-ORZ636-637-020500- /O.COR.KBOI.FW.W.0005.210701T2000Z-210702T0500Z/ Eastern Payette National Forest-Northern Boise National Forest- Southern Boise National Forest/Western Sawtooth National Forest- Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 155 PM MDT Thu Jul 1 2021 /1255 PM PDT Thu Jul 1 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM MDT /10 PM PDT/ THIS EVENING FOR LIGHTNING FOR OWYHEE MOUNTAINS...SOUTHERN HIGHLANDS...BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 423...426...636 AND 637... ...RED FLAG WARNING IN EFFECT UNTIL 11 PM MDT THIS EVENING FOR LIGHTNING FOR NORTHERN BOISE NATIONAL FOREST AND SOUTHERN BOISE NATIONAL FOREST/WESTERN SAWTOOTH NATIONAL FOREST ALONG WITH THE EASTERN PAYETTE FOREST...WHICH ARE FIRE WEATHER ZONES 402, 403 AND 421... * THUNDERSTORMS...Scattered thunderstorms are expected to continue into the evening hours. Pockets of wetting rains are probable, but outside the core very little rain is expected. * OUTFLOW WINDS...Up to 40 mph are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will occur shortly. && $$ L
847 WWUS85 KBOI 020441 RFWBOI URGENT - FIRE WEATHER MESSAGE National Weather Service Boise ID 1041 PM MDT Thu Jul 1 2021 IDZ402-403-421-423-426-ORZ636-637-020545- /O.EXP.KBOI.FW.W.0005.000000T0000Z-210702T0500Z/ Eastern Payette National Forest-Northern Boise National Forest- Southern Boise National Forest/Western Sawtooth National Forest- Owyhee Mountains-Southern Highlands-Burns BLM-Vale BLM- 1041 PM MDT Thu Jul 1 2021 /941 PM PDT Thu Jul 1 2021/ ...RED FLAG WARNING WILL EXPIRE AT 11 PM MDT /10 PM PDT/ THIS EVENING FOR LIGHTNING FOR EASTERN PAYETTE NATIONAL FOREST... NORTHERN BOISE NATIONAL FOREST...SOUTHERN BOISE NATIONAL FOREST/WESTERN SAWTOOTH NATIONAL FOREST...OWYHEE MOUNTAINS... SOUTHERN HIGHLANDS...BURNS BLM AND VALE BLM...WHICH ARE FIRE WEATHER ZONES 402...403...421...423...426...636 AND 637... Thunderstorm coverage has weakened across the warned area, therefore the Red Flag Warning will be allowed to expire. Showers continue across portions of eastern Oregon and the central Idaho mountains tonight, but lightning is no longer expected to be a significant threat. $$ L
The office that day
Everything else NWS Boise, ID issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:08 AM MDT | Red Flag Warning | BOI | 16 hr | |
| Jun 29, 9:18 PM MDT | Special Weather Statement | BOI | Ada | 27 min |
| Jun 30, 12:09 AM MDT | Special Weather Statement | BOI | Payette | 51 min |
| Jun 30, 12:10 AM MDT | Special Weather Statement | BOI | Payette | 50 min |
| Jun 30, 3:03 AM MDT | Heat Advisory | BOI | Ada, Adams, Elmore, Gooding, Jerome, Owyhee and 2 more | 6 days |
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.