Flash Flood — Wallowa, Oregon

2018-05-25 · near Imnaha Memaloose Arp, Wallowa, Oregon

Event narrative

Run off and land slides damaged Imnaha Highway (Hwy 350) between mile posts 14 and 20. Road was closed and clean up continued into at least the next day. Rainfall south of Imnaha was as much as 0.87 inches over a one and a half hour period leading up to the flood.

Wider weather episode

Persistent moist southwest flow continued into the 25th of May. Thunderstorms developed late morning and continued well into the evening. The storms produced locally heavy rain and some flooding. Also some hail occurred with the storms. The hail was mainly small, but did reach to 1 inch in diameter.

View location on OpenStreetMap → (45.3500, -116.9200)

Source: NOAA Storm Events Database, event_id 759382. Narrative written by the NWS forecast office that issued the report.