Alert archive / Washington / Red Flag Warnings in 2017
Red Flag Warning 2, NWS Seattle, WA
NWS Seattle, WA issued this red flag warning at Aug 26, 2017, 3:00 PM PDT for 7 counties in Washington. It took effect at Aug 27, 2017, 12:00 PM PDT. It was in force for 58 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
- Aug 26, 2017, 3:00 PM PDT (22:00 UTC)
- In effect from
- Aug 27, 2017, 12:00 PM PDT
- Expired
- Aug 29, 2017, 10:00 PM PDT
- In force
- 58 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 nearest sounding before it
Quillayute State, WA (KUIL), launched 12:00Z, 10.0 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
- 1258 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
928 WWUS86 KSEW 262200 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 300 PM PDT Sat Aug 26 2017 WAZ658-659-271700- /O.UPG.KSEW.FW.A.0004.170827T2000Z-170830T0400Z/ /O.NEW.KSEW.FW.W.0002.170827T1900Z-170830T0400Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 300 PM PDT Sat Aug 26 2017 ...RED FLAG WARNING IN EFFECT FROM NOON SUNDAY TO 9 PM PDT TUESDAY FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... The National Weather Service in Seattle has issued a Red Flag Warning, which is in effect from noon Sunday to 9 PM PDT Tuesday. The Fire Weather Watch is no longer in effect. * MID-LEVEL HAINES...Mid-level Haines index will be rising this weekend as instability aloft increases south to north. By Sunday afternoon the mid-level Haines index will reach 6 or high, mainly over the Cascades, and remain at that level until Tuesday evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades will reach 80s to lower 90 degrees with relative humidity dropping below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. 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. && $$ www.weather.gov/seattle
6 follow-up statements
477 WWUS86 KSEW 271516 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 816 AM PDT Sun Aug 27 2017 WAZ658-659-280000- /O.CON.KSEW.FW.W.0002.170827T1900Z-170830T0400Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 816 AM PDT Sun Aug 27 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM PDT TUESDAY FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * MID-LEVEL HAINES...Mid-level Haines index 6 or high, mainly over the Cascades, and remaining at that level until Tuesday evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades will reach 80s to lower 90s with relative humidity dropping below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. && $$ www.weather.gov/seattle
367 WWUS86 KSEW 272202 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 302 PM PDT Sun Aug 27 2017 WAZ658-659-281700- /O.CON.KSEW.FW.W.0002.000000T0000Z-170830T0400Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 302 PM PDT Sun Aug 27 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT TUESDAY FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * MID-LEVEL HAINES...Mid-level Haines index 6 or high, mainly over the Cascades, and remaining at that level until Tuesday evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades will reach 80s to lower 90s with relative humidity dropping below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. 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. && $$ www.weather.gov/seattle
731 WWUS86 KSEW 281657 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 957 AM PDT Mon Aug 28 2017 WAZ658-659-290300- /O.CON.KSEW.FW.W.0002.000000T0000Z-170830T0400Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 957 AM PDT Mon Aug 28 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT TUESDAY FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * MID-LEVEL HAINES...Mid-level Haines index 6 or high, mainly over the Cascades, and remaining at that level until Tuesday evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades will reach 80s to lower 90s with relative humidity dropping below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. && $$ www.weather.gov/seattle
681 WWUS86 KSEW 290620 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 1120 PM PDT Mon Aug 28 2017 WAZ658-659-291700- /O.EXT.KSEW.FW.W.0002.000000T0000Z-170830T0500Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 1120 PM PDT Mon Aug 28 2017 ...RED FLAG WARNING NOW IN EFFECT UNTIL 10 PM PDT TUESDAY FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * MID-LEVEL HAINES...Mid-level Haines index 6 or high, mainly over the Cascades, and remaining at that level until Tuesday evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades will reach the 80s to lower 90s with relative humidity dropping below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. 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. && $$ www.weather.gov/seattle
197 WWUS86 KSEW 291915 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 1215 PM PDT Tue Aug 29 2017 WAZ658-659-300315- /O.CON.KSEW.FW.W.0002.000000T0000Z-170830T0500Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 1215 PM PDT Tue Aug 29 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * MID-LEVEL HAINES...Mid-level Haines index 6 or high, mainly over the Cascades, and remaining at that level until this evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades will reach the 80s to lower 90s with relative humidity dropping below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A dry and unstable air mass with warm temperatures can contribute to active fire behavior. In western Washington, significant growth on existing fires takes place under such conditions. && $$ www.weather.gov/seattle
709 WWUS86 KSEW 292250 RFWSEW URGENT - FIRE WEATHER MESSAGE National Weather Service Seattle WA 350 PM PDT Tue Aug 29 2017 WAZ658-659-300500- /O.CON.KSEW.FW.W.0002.000000T0000Z-170830T0500Z/ West Slopes of the North Cascades Generally above 1500 Feet- West Slopes of the Central Cascades Generally above 1500 Feet- 350 PM PDT Tue Aug 29 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING FOR VERY HOT...DRY AND UNSTABLE CONDITIONS FOR FIRE WEATHER ZONES 658 AND 659... * MID-LEVEL HAINES...Mid-level Haines index 6 or high, mainly over the Cascades, and remaining at that level until this evening. * TEMPERATURES/HUMIDITY...Afternoon temperatures in the Cascades reaching into the 80s to lower 90s with relative humidity below 25 percent, especially close to the Cascade crest. * IMPACTS...These conditions favor active fire growth with rapid spread on any new or existing fire. Extreme fire behavior is possible. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. 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. && $$ www.weather.gov/seattle
The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 2:32 PM PDT | Small Craft Advisory | SEW | 12 hr |
Nearby
Red Flag Warnings in Washington, 2017Every red flag warning in 2017
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.