Red Flag Warning for Owyhee Mountains and Southern Highlands (Sep 11, 2026)
If you are in immediate danger, call emergency services now.
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NWS Boise ID has issued a Red Flag Warning for critical fire weather conditions in Fire Weather Zones 423 and 426 from noon to 9 PM MDT Saturday.
30 seconds on this weather notice
- Record type
- Red Flag Warning
- Affected area
- Owyhee Mountains and Southern Highlands, Idaho
- Issued
- September 11, 2026
- Issuing authority
- NWS Boise ID
Fire-weather notices describe conditions that can support rapid fire spread; they do not report that a fire is present. Check local emergency sources for any active incident.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
A Red Flag Warning has been issued by the National Weather Service Boise ID. The alert is effective from 12:47 PM MDT on September 11, 2026, with onset at 12:00 PM MDT on September 12, 2026, and ends at 9:00 PM MDT on September 12, 2026.
Affected Areas
The warning covers Fire Weather Zones 423 (Owyhee Mountains) and 426 (Southern Highlands) in Idaho.
What You Should Do
A Red Flag Warning means that critical fire weather conditions are either occurring now or will occur shortly. Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
Expected Conditions
Hot and dry conditions will combine with increasing southerly winds ahead of an approaching cold front. Sustained winds of 15 to 25 mph with gusts up to 45 mph are expected, with relative humidities between 15 and 20 percent. Temperatures will range from 78 to 88 degrees.
Timeline
The Red Flag Warning is in effect from noon to 9 PM MDT Saturday, September 12, 2026.
Original source: NOAA Official Notice ↗
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Similar body length
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Similar severity timing
Same severity (high) notices issued closest in time to September 11, 2026.
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