An upper low pressure system tracking over the Pacific Northwest brought a cooler airmass to the region, which resulted in several hours of freezing temperatures developing the morning of May 2nd in the Kittitas valley.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PDT wrote it up.
An upper low pressure system tracking over the Pacific Northwest brought a cooler airmass to the region, which resulted in several hours of freezing temperatures developing the morning of May 2nd in the Kittitas valley.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Pendleton, OR wrote its last area forecast discussion before the first event at May 1, 1:51 PM PST, 12 hours 9 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
1 frost/freeze. Local standard time, as filed.
The ASOS KELN reported temperatures at or below freezing for 2 hours ending at 0610 PDT on May 2nd. The mesonet site DW9732 Ellensburg measured at or below freezing temperatures for approximately 5 hours ending at 0715 PDT on May 2nd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2024Every state in 2024This day in weather historyWarnings in Washington, May 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1187583.