Alert archive / Washington / Grays Harbor County

Weather alerts in Grays Harbor County, Washington, 2024

15 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Grays Harbor County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts
15
Warnings
6
Watches
3
Advisories
4
Busiest month
November4 alerts
Busiest day
December 18, 20243 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

0 of 2 tornado warnings covering Grays Harbor County in 2024 had a tornado report inside them.

Grays Harbor County, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings00
Flash flood warnings00

Each office's whole area, 2024

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Seattle, WA: tornado warnings20100%0
NWS Seattle, WA: severe thunderstorm warnings20100%10%
NWS Seattle, WA: flash flood warnings060%

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Feb 27, 2:00 PM PSTFlood WatchSEW3 days
Mar 27, 8:38 PM PDTSpecial Weather StatementSEW37 min
Jul 16, 1:33 PM PDTRed Flag WarningSEW33 hr
Jul 20, 3:30 PM PDTRed Flag WarningSEW31 hr
Aug 17, 6:51 PM PDTAreal Flood AdvisorySEW6 hr
Aug 17, 7:47 PM PDTAreal Flood AdvisorySEW9 hr
Sep 3, 3:29 PM PDTFire Weather WatchSEW22 hr
Sep 4, 1:53 PM PDTRed Flag WarningSEW3 days
Nov 13, 1:27 PM PSTAreal Flood AdvisorySEW2 hr
Nov 20, 9:59 AM PSTSpecial Weather StatementSEW31 min
Nov 20, 4:15 PM PSTTornado Warning Tornado observedSEW30 min
Nov 20, 4:38 PM PSTTornado Warning Tornado observedSEW22 min
Dec 17, 5:07 PM PSTAreal Flood AdvisorySEW8 hr
Dec 18, 4:25 AM PSTRiver Flood WarningSEW18 hr
Dec 18, 11:58 AM PSTFlood WatchSEW22 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20232025

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.