First published 9/19/2026, 1:57:15 AM · Last updated 9/19/2026, 1:57:15 AM

Flash Flood Warning — NWS Billings MT (issued Sep 18 7:40PM MDT)

The National Weather Service in Billings, MT issued a Flash Flood Warning effective September 18 from 7:40 PM MDT until 10:15 PM MDT for the Billings area. Immediate flooding of low-lying areas, roads, and properties is possible during the warning period.

Categories: severe-weather-and-natural-disasters

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 9/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 6/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 5/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 2/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 9/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

Flash floods can develop rapidly and pose significant danger to people, vehicles, and infrastructure. Travelers and residents in the warned area should avoid flooded roadways, move to higher ground if threatened, and follow local emergency instructions.

Location

Sources

Flash Flood Warning issued September 18 at 7:40PM MDT until September 18 at 10:15PM MDT by NWS Billings MT

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