First published 9/20/2026, 12:54:15 AM · Last updated 9/20/2026, 12:54:15 AM

Flash Flood Warning issued September 19 at 6:25PM MDT until September 19 at 9:30PM MDT by NWS Riverton WY

The National Weather Service office in Riverton, Wyoming issued a Flash Flood Warning for the Riverton area beginning 6:25 PM MDT on September 19 (2026-09-20T00:25:00Z) and continuing until 9:30 PM MDT that evening. The warning indicates imminent or ongoing flash flooding conditions.

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: 8/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 2/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The 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, posing immediate threats to life, property, and travel. Localized flooding may close roads, strand vehicles, inundate low-lying areas, and damage infrastructure. Residents and travelers in the warned area should follow official guidance and avoid flooded roads.

Location

Sources

Flash Flood Warning issued September 19 at 6:25PM MDT until September 19 at 9:30PM MDT by NWS Riverton WY

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