Cold air flowing in from behind a departing trough made for freezing temperatures overnight into the morning of September 30 across the Wallowa Valley. the Grande Ronde Valley, and central Oregon.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
Cold air flowing in from behind a departing trough made for freezing temperatures overnight into the morning of September 30 across the Wallowa Valley. the Grande Ronde Valley, and central Oregon.
The national radar mosaic for the moment the first event began.
3 frost/freeze. Local standard time, as filed.
The Joseph, OR AWOS reported freezing and sub-freezing temperatures around 1:30 am and 7:30 am. Similar readings were found at co-op stations CW1102 in Wallowa and EW8320 in Lostine.
Redmond airport ASOS reported freezing and subfreezing temperatures for over a 3 hour period around 4 am and 7 am. Similar readings can be found at the Bend, Prineville, and Madras stations as well.
The La Grande ASOS reported freezing and subfreezing temperatures between 5 am and 7:30 am. Co-op station D6879 in Union, OR read similar values as well.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2024Every state in 2024This day in weather historyWarnings in Oregon, September 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: 1217558, 1217557, 1217559.