Alert archive / Washington / Special Marine Warnings in 2021

Special Marine Warning 18, NWS Seattle, WA

October 24, 2021

NWS Seattle, WA issued this special marine warning at Oct 24, 2021, 7:39 PM PDT. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 24, 2021, 7:39 PM PDT (02:39 UTC)
Expired: Oct 24, 2021, 8:15 PM PDT
In force: 36 min
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Hail: 0.0 in
Wind: 34.0 mph

What forecasters said that day

The local office's own words before this special marine warning 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 marine warning went out at Oct 24, 4:06 PM PDT, 3 hours 33 minutes earlier.

Area forecast discussion, Oct 24, 4:06 PM PDT, 3 hours 33 minutes before

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In the hours before

Special weather statement, Oct 24, 3:05 PM PDT, 4 hours 34 minutes before

Special Weather Statement
National Weather Service Seattle WA
305 PM PDT Sun Oct 24 2021

WAZ507-555-556-568-242230-
West Slopes North Central Cascades and Passes-East Puget Sound
Lowlands-Everett and Vicinity-Bellevue and Vicinity-
305 PM PDT Sun Oct 24 2021

...Strong line of showers will impact portions of southwestern
Snohomish and northeastern King Counties through 330 PM PDT...

At 303 PM PDT, Doppler radar was tracking a line of strong showers
along a line extending from near Lake Stevens to 8 miles south of
North Bend. Movement was east at 45 mph.

HAZARD...Wind gusts of 45 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4732 12187 4797 12224 4798 12222 4799 12223
      4800 12221 4802 12221 4802 12223 4803 12221
      4804 12222 4803 12224 4805 12228 4817 12235
      4818 12163 4747 12135
TIME...MOT...LOC 2203Z 258DEG 37KT 4806 12205 4738 12177

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

MC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 7:22 PM PDT	Special Marine Warning	SEW		23 min
Oct 24, 8:02 PM PDT	Special Marine Warning	SEW		28 min
Oct 24, 8:13 PM PDT	Special Marine Warning	SEW		32 min
Oct 25, 3:08 AM PDT	Coastal Flood Advisory	SEW	San Juan	10 hr
Oct 25, 3:58 AM PDT	River Flood Warning	SEW	Mason	5 days
Oct 25, 8:29 AM PDT	Special Marine Warning	SEW		31 min

Nearby

Special Marine Warnings in Washington, 2021 Every special marine 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.