4 concurrent flood warnings — 2 counties affected
A severe flood outbreak began in Granite County and Powell County, Montana, on July 17, 2026. Homes in the affected areas face water damage and mold growth from the flooding.
Overview written from official NOAA / National Weather Service data.
- Type
- Flood Outbreak
- Began
- To end
Affected by this event? Open your area's damage guides below to reach a vetted local restoration pro, 24/7.
Warnings covered
Warnings this outbreak covered
This page tracks the outbreak as a whole; each entry below is one official warning thread with its own live status, map and update log.
Affected areas & guides
Every area named for this event, per the official source. Open yours for damage guides — what to do first, and how to reach a vetted restoration pro, 24/7.
Granite County, MT ≈ 2 mi
Powell County, MT ≈ 20 mi
Affected area map
This alert covers multiple forecast zones — the source publishes no single perimeter, so each marker shows the center of one affected zone reported by NOAA / National Weather Service (Granite County, MT; Powell County, MT). The markers are all part of this ONE alert, not separate incidents. Pan and zoom to explore the map.
Interactive affected-area map
Granite County, MT; Powell County, MT · Enable JavaScript to explore the map.
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Storm report NWS MSO storm report
FLASH FLOOD — 1 SE Drummond, MT
Flooding across I-90 WB lane between mile marker 155-156, east of Drummond MT.
- Bulletin NWS Missoula MT
Flash Flood Warning issued
Missoula, MT; Powell, MT
- Bulletin NWS Missoula MT
Flash Flood Warning issued
Granite, MT
- Bulletin NWS Missoula MT
Flash Flood Warning issued
Granite, MT
Show 1 earlier update
- NWS Missoula MT Bulletin
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.