EF0 Tornado — Owyhee, Idaho

2023-05-27 · near Grandview, Owyhee, Idaho

Event narrative

Photos on social media showed a land spout near Grandview. Reports state at least 3 of them formed in the same area, lasting around 5 minutes each.

Wider weather episode

Several reports of land spouts and funnel clouds occurred on May 26th, May 27th, and May 31st, 2023 near Star, ID and Twin Falls, ID. The radar signatures for both events were unremarkable, leading to the conclusion that these vortices were likely originating from low level and surface directional wind shear and cumulus congestus clouds on the fringes of larger thunderstorms.

View location on OpenStreetMap → (42.9400, -116.1100)

Source: NOAA Storm Events Database, event_id 1100057. Narrative written by the NWS forecast office that issued the report.