First published 9/19/2026, 3:20:15 AM · Last updated 9/27/2026, 6:48:30 PM

Flash Flood Warning — NWS Cheyenne WY (issued Sep 18 9:12PM MDT)

A Flash Flood Warning was issued by NWS Cheyenne WY on September 18 at 9:12PM MDT (2026-09-19T03:12:00Z) for the Cheyenne, Wyoming area; the warning was valid until September 18 at 11:15PM MDT (2026-09-19T05:15:00Z).

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: 7/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 6/10The 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 flooding poses immediate danger to life and property, can inundate roads and structures, and may require people in the affected area to seek higher ground or avoid travel until the threat passes.

Location

Sources

Flash Flood Warning issued September 18 at 9:12PM MDT until September 18 at 11:15PM MDT by NWS Cheyenne WY

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