Alert archive / Washington / Red Flag Warnings in 2011
Red Flag Warning 2, NWS Seattle, WA
NWS Seattle, WA issued this red flag warning at Sep 6, 2011, 3:17 PM PDT for 11 counties in Washington. It took effect at Sep 7, 2011, 11:00 AM PDT. It was in force for 13 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
- Sep 6, 2011, 3:17 PM PDT (22:17 UTC)
- In effect from
- Sep 7, 2011, 11:00 AM PDT
- Expired
- Sep 8, 2011, 12:00 AM PDT
- In force
- 13 hr
- Issued by
- NWS Seattle, WA
Counties Clallam County, WA, Grays Harbor County, WA, Jefferson County, WA, King County, WA, Lewis County, WA, Mason County, WA, Pierce County, WA, Skagit County, WA, Skamania County, WA, Snohomish County, WA, Whatcom County, WA
The radar
The Seattle radar (KATX), 74 km from the middle of the area, began a volume at 22:20 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 152 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
- 1208 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
747 WWUS86 KSEW 062217 RFWSEW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 317 PM PDT TUE SEP 6 2011 ...CRITICALLY DRY AND UNSTABLE AIR MASS EXPECTED OVER MOUNTAIN ZONES ON WEDNESDAY... .A STRONG UPPER LEVEL RIDGE IS IN PLACE OVER THE NORTHWEST. AS A RESULT...A STRONG SUBSIDENCE INVERSION WILL SINK DOWN INTO THE LOWER ELEVATIONS ON WEDNESDAY. LOCATIONS ABOVE THE SUBSIDENCE INVERSION...ROUGHLY ABOVE 2000 FEET...WILL BE EXPOSED TO AN EXTREMELY DRY AND UNSTABLE AIR MASS WITH SOLID MID-LEVEL HAINES 6 CONDITIONS. WAZ658-659-661-071600- /O.UPG.KSEW.FW.A.0002.110907T1800Z-110909T0100Z/ /O.NEW.KSEW.FW.W.0002.110907T1800Z-110908T0700Z/ NORTH CASCADES-CENTRAL CASCADES- EAST PORTION OF THE OLYMPIC MOUNTAINS- 317 PM PDT TUE SEP 6 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT FOR CRITICALLY DRY AND UNSTABLE CONDITIONS FOR THE CASCADE AND OLYMPIC MOUNTAINS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A RED FLAG WARNING FOR CRITICALLY DRY AND UNSTABLE CONDITIONS...WHICH IS IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 658...659 AND 661...INCLUDING OLYMPIC NATIONAL PARK...OLYMPIC NATIONAL FOREST...MOUNT BAKER- SNOQUALMIE NATIONAL FOREST...NORTH CASCADES NATIONAL PARK...AND MOUNT RAINIER NATIONAL PARK. * RELATIVE HUMIDITY...MINIMUM RELATIVE HUMIDITY ON WEDNESDAY OF 15-25 PERCENT. * TEMPERATURES...AFTERNOON TEMPERATURES IN THE 70S AND 80S AT HIGHER ELEVATIONS. * HAINES INDEX...MID-LEVEL HAINES 6 (HIGH). HIGH-LEVEL HAINES 5 (MODERATE). PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL.PRECAUTIONARY/PREPAREDNESS ACTIONS... && $$ WAZ652-071600- /O.NEW.KSEW.FW.W.0002.110907T1800Z-110908T0700Z/ WEST PORTION OF THE OLYMPIC MOUNTAINS- 317 PM PDT TUE SEP 6 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT FOR CRITICALLY DRY AND UNSTABLE CONDITIONS FOR THE CASCADE AND OLYMPIC MOUNTAINS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A RED FLAG WARNING FOR CRITICALLY DRY AND UNSTABLE CONDITIONS...WHICH IS IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT. * AFFECTED AREA...FIRE WEATHER ZONE 652...INCLUDING OLYMPIC NATIONAL PARK AND OLYMPIC NATIONAL FOREST. * RELATIVE HUMIDITY...MINIMUM RELATIVE HUMIDITY ON WEDNESDAY OF 20-35 PERCENT. * TEMPERATURES...AFTERNOON TEMPERATURES IN THE 70S AND 80S AT HIGHER ELEVATIONS. * HAINES INDEX...MID-LEVEL HAINES 6. HIGH-LEVEL HAINES 5. * IMPACTS... PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ HANER WEATHER.GOV/SEATTLE
2 follow-up statements
195 WWUS86 KSEW 071113 CCA RFWSEW URGENT - FIRE WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE SEATTLE WA 411 AM PDT WED SEP 7 2011 ...CRITICALLY DRY AND UNSTABLE AIR MASS EXPECTED OVER MOUNTAIN ZONES ON WEDNESDAY... .A STRONG UPPER LEVEL RIDGE IS IN PLACE OVER THE NORTHWEST. AS A RESULT...A STRONG SUBSIDENCE INVERSION WILL SINK DOWN INTO THE LOWER ELEVATIONS ON WEDNESDAY. LOCATIONS ABOVE THE SUBSIDENCE INVERSION...ROUGHLY ABOVE 2000 FEET...WILL BE EXPOSED TO AN EXTREMELY DRY AND UNSTABLE AIR MASS WITH SOLID MID-LEVEL HAINES 6 CONDITIONS. WAZ658-659-661-080500- /O.UPG.KSEW.FW.A.0002.110907T1800Z-110909T0100Z/ /O.COR.KSEW.FW.W.0002.110907T1800Z-110908T0700Z/ NORTH CASCADES-CENTRAL CASCADES- EAST PORTION OF THE OLYMPIC MOUNTAINS- 411 AM PDT WED SEP 7 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT FOR CRITICALLY DRY AND UNSTABLE CONDITIONS FOR THE CASCADE AND OLYMPIC MOUNTAINS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A RED FLAG WARNING FOR CRITICALLY DRY AND UNSTABLE CONDITIONS...WHICH IS IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 658...659 AND 661...INCLUDING OLYMPIC NATIONAL PARK...OLYMPIC NATIONAL FOREST...MOUNT BAKER- SNOQUALMIE NATIONAL FOREST...NORTH CASCADES NATIONAL PARK...AND MOUNT RAINIER NATIONAL PARK. * RELATIVE HUMIDITY...MINIMUM RELATIVE HUMIDITY ON WEDNESDAY OF 15-25 PERCENT. * TEMPERATURES...AFTERNOON TEMPERATURES IN THE 70S AND 80S AT HIGHER ELEVATIONS. * HAINES INDEX...MID-LEVEL HAINES 6 (HIGH). HIGH-LEVEL HAINES 5 (MODERATE). PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ WAZ652-080500- /O.NEW.KSEW.FW.W.0002.110907T1800Z-110908T0700Z/ WEST PORTION OF THE OLYMPIC MOUNTAINS- 411 AM PDT WED SEP 7 2011 ...RED FLAG WARNING IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT FOR CRITICALLY DRY AND UNSTABLE CONDITIONS FOR THE CASCADE AND OLYMPIC MOUNTAINS... THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A RED FLAG WARNING FOR CRITICALLY DRY AND UNSTABLE CONDITIONS...WHICH IS IN EFFECT FROM 11 AM WEDNESDAY TO MIDNIGHT PDT WEDNESDAY NIGHT. * AFFECTED AREA...FIRE WEATHER ZONE 652...INCLUDING OLYMPIC NATIONAL PARK AND OLYMPIC NATIONAL FOREST. * RELATIVE HUMIDITY...MINIMUM RELATIVE HUMIDITY ON WEDNESDAY OF 20-35 PERCENT. * TEMPERATURES...AFTERNOON TEMPERATURES IN THE 70S AND 80S AT HIGHER ELEVATIONS. * HAINES INDEX...MID-LEVEL HAINES 6. HIGH-LEVEL HAINES 5. * IMPACTS... PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ HANER WEATHER.GOV/SEATTLE
291 WWUS86 KSEW 072118 RFWSEW URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 218 PM PDT WED SEP 7 2011 ...CRITICALLY DRY AND UNSTABLE AIR MASS EXPECTED OVER MOUNTAIN ZONES TODAY... .A STRONG UPPER LEVEL RIDGE IS IN PLACE OVER THE NORTHWEST. AS A RESULT...A STRONG SUBSIDENCE INVERSION SINKING DOWN INTO THE LOWER ELEVATIONS TODAY THROUGH TONIGHT. LOCATIONS ABOVE THE SUBSIDENCE INVERSION...ROUGHLY ABOVE 2000 FEET...WILL BE EXPOSED TO AN EXTREMELY DRY AND UNSTABLE AIR MASS WITH SOLID MID-LEVEL HAINES 6 CONDITIONS. WAZ652-658-659-661-080700- /O.CON.KSEW.FW.W.0002.000000T0000Z-110908T0700Z/ WEST PORTION OF THE OLYMPIC MOUNTAINS-NORTH CASCADES- CENTRAL CASCADES-EAST PORTION OF THE OLYMPIC MOUNTAINS- 218 PM PDT WED SEP 7 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT PDT TONIGHT FOR CRITICALLY DRY AND UNSTABLE CONDITIONS FOR THE CASCADE AND OLYMPIC MOUNTAINS... * AFFECTED AREA...FIRE WEATHER ZONES 658...659...652...AND 661... INCLUDING OLYMPIC NATIONAL PARK...OLYMPIC NATIONAL FOREST... MOUNT BAKER- SNOQUALMIE NATIONAL FOREST...NORTH CASCADES NATIONAL PARK...AND MOUNT RAINIER NATIONAL PARK. * RELATIVE HUMIDITY...MINIMUM RELATIVE HUMIDITY ON WEDNESDAY OF 15-25 PERCENT. * TEMPERATURES...AFTERNOON TEMPERATURES IN THE 70S AND 80S AT HIGHER ELEVATIONS. * HAINES INDEX...MID-LEVEL HAINES 6 (HIGH). HIGH-LEVEL HAINES 5 (MODERATE). PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...WARM TEMPERATURES AND UNSTABLE AIR MASS WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ JBB WWW.WEATHER.GOV/SEATTLE
The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 12:26 AM PDT | Small Craft Advisory | SEW | 6 hr |
Nearby
Red Flag Warnings in Washington, 2011Every red flag warning in 2011
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.