Alert archive / Washington / Special Weather Statements in 2021

Special Weather Statement, NWS Seattle, WA

November 15, 2021Skagit County, Snohomish County, Washington

NWS Seattle, WA issued this special weather statement at Nov 15, 2021, 12:18 PM PST for Skagit County, Snohomish County, Washington. It was in force for 57 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 15, 2021, 12:18 PM PST (20:18 UTC)
Expired: Nov 15, 2021, 1:15 PM PST
In force: 57 min
Issued by: NWS Seattle, WA
Hail: 0.00 in
Wind: 40

Counties Skagit County, WA, Snohomish County, WA

The radar

The Seattle radar (KATX), 112 km from the middle of the area, began a volume at 20:19 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

Spokane, WA (KOTX), launched 12:00Z, 8.3 hours before the alert went out and 352 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1166 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 349 m²/s²
0-3 km storm-relative helicity: 399 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 15, 9:21 AM PST, 2 hours 57 minutes earlier.

Area forecast discussion, Nov 15, 9:21 AM PST, 2 hours 57 minutes before

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In the hours before

Local storm report, Nov 15, 9:17 AM PST, 3 hours 1 minute before

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Local storm report, Nov 15, 9:18 AM PST, 3 hours before

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Local storm report, Nov 15, 11:41 AM PST, 37 minutes before

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Local storm report, Nov 15, 11:42 AM PST, 36 minutes before

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Local storm report, Nov 15, 12:03 PM PST, 15 minutes before

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Special weather statement, Nov 15, 12:18 PM PST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 14, 6:22 PM PST	Areal Flood Advisory	SEW	Clallam	22 hr
Nov 14, 7:27 PM PST	High Wind Warning	SEW		24 hr
Nov 14, 8:14 PM PST	River Flood Warning	SEW	Clallam	31 hr
Nov 14, 9:08 PM PST	River Flood Warning	SEW	Clallam	30 hr
Nov 14, 9:50 PM PST	River Flood Warning	SEW	Skagit	50 hr
Nov 14, 11:57 PM PST	River Flood Warning	SEW	Snohomish	26 hr
Nov 14, 11:59 PM PST	River Flood Warning	SEW	Snohomish	7 hr
Nov 15, 5:37 AM PST	Coastal Flood Advisory	SEW	San Juan	11 hr
Nov 15, 5:52 AM PST	Areal Flood Advisory	SEW	San Juan	10 hr
Nov 15, 5:55 AM PST	Areal Flood Advisory	SEW	Clallam, Jefferson	10 hr
Nov 15, 8:13 AM PST	Areal Flood Warning	SEW	Skagit, Whatcom	32 hr
Nov 15, 11:17 AM PST	Winter Weather Advisory	SEW		23 hr
Nov 15, 2:11 PM PST	Gale Warning	SEW		13 hr
Nov 15, 3:22 PM PST	Wind Advisory	SEW		4 hr

Nearby

Special Weather Statements in Washington, 2021 Every 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.