NWS Pocatello IDFF.W 0010September 17, 2026
Flash Flood Warning: Bonneville and Jefferson, ID
The National Weather Service office in Pocatello issued a flash flood warning for Bonneville and Jefferson in Idaho, which was in force until 2:00 a.m. local time on September 18. It was the 10th flash flood warning the NWS office in Pocatello issued in 2026. Idaho had 10 flash flood warnings in September 2026, against 3 in an average September of 2008-2025 (Idaho's flash flood warnings by year).
ExpiredWarning
In force for 4 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Pocatello ID
- Area
- Bonneville and Jefferson
- State
- Idaho
- Level
- Warning
- Issued
- 10:00 p.m. MDT, September 17, 2026
- Expires
- 2:00 a.m. MDT, September 18, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KPIH FF.W 0010
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWPIH The National Weather Service in Pocatello has issued a * Flash Flood Warning for... North Central Bonneville County in southeastern Idaho... South Central Jefferson County in southeastern Idaho... * Until 200 AM MDT. * At 1000 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Idaho Falls, Rigby, Lorenzo, Ucon, Menan and Lewisville.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.