First published Oct 21, 2026, 4:38:15 PM UTC · Last updated Oct 21, 2026, 4:38:15 PM UTC

Floods

Flash Flood Watch — NWS Boise ID

Original source title

Flash Flood Watch issued October 21 at 10:06AM MDT until October 23 at 12:00PM MDT by NWS Boise ID

Reported by U.S. National Weather Service Alerts NWS

The NWS issued a watch for possible flash flooding and debris flows around the Crooked and Wapiti burn scars in southwest Idaho, from Thursday evening through Friday morning. Heavy rainfall is forecast, and residents near the burn scars are advised to monitor updates and prepare to act if warnings are issued.

At a glance

Affected location: Boise Mountains

Illustrative image: Map of the Boise River Watershed. Created with the free Global Watersheds web app and data from the United States Geological Survey. Permalink to interactive map: https://mghydro.com/watersheds/shared/E67803.html — Mheberger/Wikimedia Commons, CC BY-SA 4.0

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Why it matters

The watch advises residents near the burn scars to prepare for possible debris flows and follow updated forecasts.

Location

Highlighted marker: this event.

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: 3/10How 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: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 4/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

U.S. National Weather Service Alerts NWS Flash Flood Watch issued October 21 at 10:06AM MDT until October 23 at 12:00PM MDT by NWS Boise ID

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