Alert archive / Washington / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 4, NWS Seattle, WA
NWS Seattle, WA issued this severe thunderstorm warning at Nov 9, 2021, 2:00 PM PST for Grays Harbor County, Mason County, Washington. It was in force for 30 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Nov 9, 2021, 2:00 PM PST (22:00 UTC)
- Expired
- Nov 9, 2021, 2:30 PM PST
- In force
- 30 min
- Issued by
- NWS Seattle, WA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Grays Harbor County, WA, Mason County, WA
The radar
The Langley Hill radar (KLGX), 40 km from the middle of the area, began a volume at 21:59 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 9, 2:25 PM PST | TSTM WND DMG | Matlock, WA | PUBLIC CALLED TO REPORT HEAVY DAMAGE TO THE LOGHOUSE ON THEIR PROPERTY. MULTIPLE DOUGLAS FIRS WERE UPROOTED ON THEIR PROPERTY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Quillayute State, WA (KUIL), launched 12:00Z, 10.0 hours before the alert went out and 116 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
- 599 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 887 m²/s²
- 0-3 km storm-relative helicity
- 1203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
301 WUUS56 KSEW 092200 SVRSEW WAC027-045-092230- /O.NEW.KSEW.SV.W.0004.211109T2200Z-211109T2230Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Seattle WA 200 PM PST Tue Nov 9 2021 The National Weather Service in Seattle has issued a * Severe Thunderstorm Warning for... Central Grays Harbor County in northwestern Washington... Southwestern Mason County in northwestern Washington... * Until 230 PM PST * At 159 PM PST, a severe thunderstorm was located 10 miles northeast of Aberdeen, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Aberdeen, Montesano, Matlock and Satsop. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4698 12379 4715 12385 4736 12325 4709 12318 TIME...MOT...LOC 2159Z 248DEG 42KT 4710 12371 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...OBSERVED MAX WIND GUST...60 MPH $$ PULLIN
1 follow-up statement
178 WWUS56 KSEW 092217 SVSSEW Severe Weather Statement National Weather Service Seattle WA 217 PM PST Tue Nov 9 2021 WAC027-045-092230- /O.CON.KSEW.SV.W.0004.000000T0000Z-211109T2230Z/ Grays Harbor-Mason- 217 PM PST Tue Nov 9 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM PST FOR EAST CENTRAL GRAYS HARBOR AND SOUTHWESTERN MASON COUNTIES... At 217 PM PST, a severe thunderstorm was located near Matlock, or 15 miles west of Shelton, moving east at 50 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Montesano, Matlock and Satsop. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4702 12357 4723 12362 4736 12325 4709 12318 TIME...MOT...LOC 2217Z 248DEG 42KT 4718 12342 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ PULLIN
The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 8, 10:15 PM PST | River Flood Warning | SEW | Mason | 46 hr |
| Nov 9, 12:15 AM PST | Gale Warning | SEW | 20 hr | |
| Nov 9, 12:15 AM PST | Storm Warning | SEW | 7 hr | |
| Nov 9, 1:50 AM PST | High Wind Warning | SEW | San Juan | 8 hr |
| Nov 9, 4:04 AM PST | Special Weather Statement | SEW | Clallam | 26 min |
| Nov 9, 6:29 AM PST | Special Weather Statement | SEW | Island | 46 min |
| Nov 9, 7:17 AM PST | Special Weather Statement | SEW | Skagit, Whatcom | 28 min |
| Nov 9, 11:15 AM PST | Special Weather Statement | SEW | Grays Harbor | 45 min |
| Nov 9, 11:23 AM PST | Special Marine Warning | SEW | 52 min | |
| Nov 9, 11:40 AM PST | Tornado Warning | SEW | Kitsap | 35 min |
| Nov 9, 11:59 AM PST | Tornado Warning | SEW | Kitsap | 17 min |
| Nov 9, 12:01 PM PST | Special Marine Warning | SEW | 44 min | |
| Nov 9, 12:24 PM PST | Special Weather Statement | SEW | Mason | 51 min |
| Nov 9, 12:58 PM PST | Special Weather Statement | SEW | Clallam | 32 min |
| Nov 9, 1:36 PM PST | Special Weather Statement | SEW | Kitsap | 39 min |
| Nov 9, 1:52 PM PST | Special Weather Statement | SEW | Grays Harbor | 38 min |
| Nov 9, 2:14 PM PST | Special Weather Statement | SEW | Snohomish | 46 min |
| Nov 9, 2:27 PM PST | Severe Thunderstorm Warning | SEW | Mason, Thurston | 33 min |
| Nov 9, 2:38 PM PST | Special Weather Statement | SEW | Kitsap | 37 min |
| Nov 9, 2:41 PM PST | Special Marine Warning | SEW | 28 min | |
| Nov 9, 2:50 PM PST | Special Weather Statement | SEW | Grays Harbor | 25 min |
Nearby
Severe Thunderstorm Warnings in Washington, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.