Alert archive / Washington / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Seattle, WA
NWS Seattle, WA issued this red flag warning at Jun 27, 2021, 3:16 PM PDT for 7 counties in Washington. It took effect at Jun 28, 2021, 11:00 AM PDT. 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 27, 2021, 3:16 PM PDT (22:16 UTC)
- In effect from
- Jun 28, 2021, 11:00 AM PDT
- Expired
- Jun 28, 2021, 8:00 PM PDT
- In force
- 9 hr
- Issued by
- NWS Seattle, WA
Counties King County, WA, Lewis County, WA, Pierce County, WA, Skagit County, WA, Skamania County, WA, Snohomish County, WA, Whatcom County, WA
The radar
The Seattle radar (KATX), 87 km from the middle of the area, began a volume at 22:18 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
Quillayute State, WA (KUIL), launched 12:00Z, 10.3 hours before the alert went out and 197 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
- 1777 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
372 WWUS86 KSEW 272216 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 316 PM PDT Sun Jun 27 2021 WAZ659-282215- /O.NEW.KSEW.FW.W.0001.210628T1800Z-210629T0300Z/ West Slopes of the Central Cascades Generally above 1500 Feet- 316 PM PDT Sun Jun 27 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT MONDAY FOR HOT, DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONE 659... The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, which is in effect from 11 AM to 8 PM PDT Monday. * AFFECTED AREA...Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 17 percent. * TEMPERATURES...In the mid 90s. * HAINES...6 or High. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended. && $$
3 follow-up statements
620 WWUS86 KSEW 281027 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 327 AM PDT Mon Jun 28 2021 WAZ658-282300- /O.EXA.KSEW.FW.W.0001.210628T1800Z-210629T0300Z/ West Slopes of the North Cascades Generally above 1500 Feet- 327 AM PDT Mon Jun 28 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING FOR HOT, DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONE 658... The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, which is in effect from 11 AM this morning to 8 PM PDT this evening. * AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 15 percent. * TEMPERATURES...Mid to upper 90s. * HAINES...6 or High. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended. && $$ WAZ656-657-282300- /O.EXA.KSEW.FW.W.0001.210628T1800Z-210629T0300Z/ Northeast Puget Sound Lowlands Generally Below 1500 Feet- Southeast Puget Sound Lowlands Generally Below 1500 Feet- 327 AM PDT Mon Jun 28 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING FOR HOT, DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 656 AND 657... The National Weather Service in Seattle has issued a Red Flag Warning for hot, dry and unstable conditions, which is in effect from 11 AM this morning to 8 PM PDT this evening. * AFFECTED AREA...Fire Weather Zone 656 Northeast Puget Sound Lowlands Generally Below 1500 Feet and Fire Weather Zone 657 Southeast Puget Sound Lowlands Generally Below 1500 Feet. * RELATIVE HUMIDITY...As low as 17 percent. * TEMPERATURES...100 to 115. * HAINES...6 or High. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended. && $$ WAZ659-282300- /O.CON.KSEW.FW.W.0001.210628T1800Z-210629T0300Z/ West Slopes of the Central Cascades Generally above 1500 Feet- 327 AM PDT Mon Jun 28 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING FOR HOT, DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONE 659... * AFFECTED AREA...Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 15 percent. * TEMPERATURES...Mid 90s to 110. * HAINES...6 or High. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended. && $$
716 WWUS86 KSEW 282239 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 339 PM PDT Mon Jun 28 2021 WAZ658-659-290300- /O.CON.KSEW.FW.W.0001.000000T0000Z-210629T0300Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 339 PM PDT Mon Jun 28 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * AFFECTED AREA...Fire Weather Zone 658 West Slopes of the North Cascades Generally above 1500 Feet and Fire Weather Zone 659 West Slopes of the Central Cascades Generally above 1500 Feet. * RELATIVE HUMIDITY...As low as 21 percent. * TEMPERATURES...In the lower 90s. * HAINES...6 or High. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended. && $$ WAZ656-657-290300- /O.CON.KSEW.FW.W.0001.000000T0000Z-210629T0300Z/ Northeast Puget Sound Lowlands Generally Below 1500 Feet- Southeast Puget Sound Lowlands Generally Below 1500 Feet- 339 PM PDT Mon Jun 28 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 656 AND 657... * AFFECTED AREA...Fire Weather Zone 656 Northeast Puget Sound Lowlands Generally Below 1500 Feet and Fire Weather Zone 657 Southeast Puget Sound Lowlands Generally Below 1500 Feet. * RELATIVE HUMIDITY...As low as 19 percent. * TEMPERATURES...100 to 111. * HAINES...6 or High. * IMPACTS...A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. If a fire were to begin, air quality may diminish in the surrounding area. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either imminent or occurring now. Any fires that develop will likely spread quickly. Outdoor burning is not recommended. && $$
431 WWUS86 KSEW 290302 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 802 PM PDT Mon Jun 28 2021 WAZ656>659-290415- /O.EXP.KSEW.FW.W.0001.000000T0000Z-210629T0300Z/ Northeast Puget Sound Lowlands Generally Below 1500 Feet- Southeast Puget Sound Lowlands Generally Below 1500 Feet- West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 802 PM PDT Mon Jun 28 2021 ...RED FLAG WARNING HAS EXPIRED FOR HOT, DRY, AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 656, 657, 658, AND 659... Fire danger will decrease tonight as onshore flow develops, bringing some somewhat cooler temperatures and higher humidities. $$
The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 8:41 AM PDT | Small Craft Advisory | SEW | 14 hr | |
| Jun 27, 2:25 PM PDT | Gale Watch | SEW | 13 hr |
Nearby
Red Flag Warnings in Washington, 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.