This event is no longer active — it's kept here as a record. Recovery may still be underway; the guidance below applies.
4 concurrent flood warnings — 2 counties affected
A severe flood outbreak affected Granite County and Powell County, Montana, from July 17–18, 2026. Homes in the region faced water damage and potential mold development from the event.
Overview written from official NOAA / National Weather Service data.
- Type
- Flood Outbreak
- Extent
- ≈ 131,114 acres
- Began
- To end
Affected by this event? Open your area's damage guides below to reach a vetted local restoration pro, 24/7.
Affected area map
Each shaded area is one covered warning's reported footprint — this outbreak groups the 4 warnings listed below, colored by hazard type. Press Play below to watch each footprint appear in the order it was issued. Pan and zoom to explore the map.
Interactive affected-area map
Granite County, MT; Powell County, MT · ≈ 210 sq mi reported extent · Enable JavaScript to explore the map.
2026-07-17 23:09 UTC · snapshot 4 of 4
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NOAA / National Weather Service ↗.
Restoration help near this event
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Water damage restoration
What to do now
Mold remediation
What to do now
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 2 earlier updates
- NWS Missoula MT Bulletin
- First Alert 4 News
Man accused of intentionally hitting pedestrian with car in Madison County
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NOAA / National Weather Service ↗.
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.