Alert archive / Washington / Special Weather Statements in 2021

Special Weather Statement, NWS Seattle, WA

November 9, 2021Island County, Washington

NWS Seattle, WA issued this special weather statement at Nov 9, 2021, 6:29 AM PST for Island County, Washington. It was in force for 46 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, 6:29 AM PST (14:29 UTC)
Expired
Nov 9, 2021, 7:15 AM PST
In force
46 min
Issued by
NWS Seattle, WA
Hail
0.00 in
Wind
30

County Island County, WA

The radar

The Seattle radar (KATX), 30 km from the middle of the area, began a volume at 14:33 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, 2.5 hours before the alert went out and 155 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.

Skew-T log-pSkew-T log-p diagram, Quillayute State, WA at 12:00Z on 2021-11-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Quillayute State, WA at 12:00Z on 2021-11-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 887 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Seattle, WA wrote its last area forecast discussion before this special weather statement went out at Nov 9, 3:21 AM PST, 3 hours 8 minutes earlier.

Area forecast discussion, Nov 9, 3:21 AM PST, 3 hours 8 minutes before
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In the hours before

Special weather statement, Nov 9, 1:33 AM PST, 4 hours 56 minutes before
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Special weather statement, Nov 9, 4:04 AM PST, 2 hours 25 minutes before
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Special weather statement, Nov 9, 6:29 AM PST, 0 minutes before
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The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 8, 10:15 PM PSTRiver Flood WarningSEWMason46 hr
Nov 9, 12:15 AM PSTGale WarningSEW20 hr
Nov 9, 12:15 AM PSTStorm WarningSEW7 hr
Nov 9, 1:50 AM PSTHigh Wind WarningSEWSan Juan8 hr
Nov 9, 4:04 AM PSTSpecial Weather StatementSEWClallam26 min
Nov 9, 7:17 AM PSTSpecial Weather StatementSEWSkagit, Whatcom28 min
Nov 9, 11:15 AM PSTSpecial Weather StatementSEWGrays Harbor45 min
Nov 9, 11:23 AM PSTSpecial Marine WarningSEW52 min
Nov 9, 11:40 AM PSTTornado WarningSEWKitsap35 min
Nov 9, 11:59 AM PSTTornado WarningSEWKitsap17 min
Nov 9, 12:01 PM PSTSpecial Marine WarningSEW44 min
Nov 9, 12:24 PM PSTSpecial Weather StatementSEWMason51 min
Nov 9, 12:58 PM PSTSpecial Weather StatementSEWClallam32 min
Nov 9, 1:36 PM PSTSpecial Weather StatementSEWKitsap39 min
Nov 9, 1:52 PM PSTSpecial Weather StatementSEWGrays Harbor38 min
Nov 9, 2:00 PM PSTSevere Thunderstorm WarningSEWGrays Harbor, Mason30 min
Nov 9, 2:14 PM PSTSpecial Weather StatementSEWSnohomish46 min
Nov 9, 2:27 PM PSTSevere Thunderstorm WarningSEWMason, Thurston33 min
Nov 9, 2:38 PM PSTSpecial Weather StatementSEWKitsap37 min
Nov 9, 2:41 PM PSTSpecial Marine WarningSEW28 min
Nov 9, 2:50 PM PSTSpecial Weather StatementSEWGrays Harbor25 min

Nearby

Special Weather Statements in Washington, 2021Every special weather statement 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.