Alert archive / Washington / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 5, NWS Seattle, WA
NWS Seattle, WA issued this severe thunderstorm warning at Nov 9, 2021, 2:27 PM PST for Mason County, Thurston County, Washington. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Nov 9, 2021, 2:27 PM PST (22:27 UTC)
- Expired
- Nov 9, 2021, 3:00 PM PST
- In force
- 33 min
- Issued by
- NWS Seattle, WA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Mason County, WA, Thurston County, WA
The radar
The Langley Hill radar (KLGX), 84 km from the middle of the area, began a volume at 22:30 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, 10.5 hours before the alert went out and 133 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.
303
WUUS56 KSEW 092227
SVRSEW
WAC045-067-092300-
/O.NEW.KSEW.SV.W.0005.211109T2227Z-211109T2300Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Seattle WA
227 PM PST Tue Nov 9 2021
The National Weather Service in Seattle has issued a
* Severe Thunderstorm Warning for...
Northwestern Thurston County in west central Washington...
Southern Mason County in northwestern Washington...
* Until 300 PM PST
* At 226 PM PST, a severe thunderstorm was located near Matlock, or 9
miles west of Shelton, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Shelton, Matlock, Skokomish and Tahuya.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
If on or near waters in the Hood Canal area near Shelton to
Hoodsport, get away from the water and move indoors or inside a
vehicle. Remember, lightning can strike out to 15 miles from the
parent thunderstorm. If you can hear thunder, you are close enough
to be struck by lightning. Move to safe shelter now! Do not be
caught on the water in a thunderstorm.
&&
LAT...LON 4728 12347 4739 12291 4744 12285 4743 12288
4737 12304 4737 12311 4738 12311 4750 12288
4737 12280 4724 12294 4721 12293 4728 12289
4730 12285 4718 12286 4716 12288 4719 12290
4715 12293 4708 12343 4709 12343
TIME...MOT...LOC 2226Z 250DEG 38KT 4721 12331
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PULLIN2 follow-up statements
896
WWUS56 KSEW 092247
SVSSEW
Severe Weather Statement
National Weather Service Seattle WA
247 PM PST Tue Nov 9 2021
WAC045-067-092300-
/O.CON.KSEW.SV.W.0005.000000T0000Z-211109T2300Z/
Thurston-Mason-
247 PM PST Tue Nov 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 300 PM PST
FOR NORTHWESTERN THURSTON AND CENTRAL MASON COUNTIES...
At 246 PM PST, a severe thunderstorm was located near Shelton, moving
east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Shelton and Skokomish.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
If on or near waters in the Hood Canal area near Shelton to
Hoodsport, get away from the water and move indoors or inside a
vehicle. remember, lightning can strike out to 15 miles from the
parent thunderstorm. If you can hear thunder, you are close enough
to be struck by lightning. Move to safe shelter now! Do not be
caught on the water in a thunderstorm.
&&
LAT...LON 4739 12291 4744 12285 4738 12303 4737 12311
4738 12311 4750 12288 4737 12280 4724 12294
4721 12293 4728 12289 4730 12285 4718 12286
4716 12288 4719 12290 4715 12293 4711 12322
4732 12329
TIME...MOT...LOC 2246Z 250DEG 38KT 4728 12302
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
PULLIN812
WWUS56 KSEW 092253
SVSSEW
Severe Weather Statement
National Weather Service Seattle WA
253 PM PST Tue Nov 9 2021
WAC045-067-092302-
/O.EXP.KSEW.SV.W.0005.000000T0000Z-211109T2300Z/
Thurston-Mason-
253 PM PST Tue Nov 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN THURSTON AND
CENTRAL MASON COUNTIES WILL EXPIRE AT 300 PM PST...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with these thunderstorms.
LAT...LON 4739 12291 4744 12285 4738 12303 4737 12311
4738 12311 4750 12288 4737 12280 4724 12294
4721 12293 4728 12289 4730 12285 4718 12286
4716 12288 4719 12290 4715 12293 4711 12322
4732 12329
TIME...MOT...LOC 2252Z 250DEG 38KT 4730 12295
$$
PULLINThe 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, 2:00 PM PST | Severe Thunderstorm Warning | SEW | Grays Harbor, Mason | 30 min |
| Nov 9, 2:14 PM PST | Special Weather Statement | SEW | Snohomish | 46 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.