Red Flag Warning for Upper Snake River Valley Extended to 9 p.m. Sept. 11
The National Weather Service in Pocatello has pushed the end of the Red Flag Warning for the Upper Snake River Valley/Idaho Falls BLM back to 9 p.m. Mountain Time on Friday, Sept. 11, 2026, longer than first issued.
4 reports on this incident · first at Sep 10, 2026, 9:42 p.m. ET
Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
We last searched for new coverage of this at Sep 10, 2026, 10:08 p.m. ET — checked 1h ago.
Earlier reports
Sep 10, 2026, 10:24 p.m. ET
Red Flag Warning for Upper Snake River Valley/Idaho Falls BLM from 2026-09-11T12:00:00-06:00 to 2026-09-11T21:00:00-06:00
The National Weather Service Pocatello ID has issued a Red Flag Warning for Upper Snake River Valley/Idaho Falls BLM, effective from 2026-09-11T12:00:00-06:00 until 2026-09-11T21:00:00-06:00, according to the agency's warning record.
The warning was issued at 2026-09-10T19:37:00-06:00 and covers one zone. The agency states that existing or new fires could grow rapidly under the conditions.
According to the warning record, a Red Flag Warning means critical fire weather conditions are either occurring now or will shortly, based on criteria for Southeastern Idaho: relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain; thunderstorm coverage of 25 percent without specific rainfall criteria; or other high-impact events deemed critical by the National Weather Service and area fire management agencies.
The cause of any fire activity has not been determined.
Sep 10, 2026, 10:24 p.m. ET
Weather Service Warns Existing or New Fires Could Grow Rapidly in Upper Snake River Valley on Sept. 11
The National Weather Service Pocatello ID says existing or new fires could grow rapidly in the Upper Snake River Valley/Idaho Falls BLM area, according to the office's Red Flag Warning. The warning is in effect from noon to 9 p.m. Mountain Time on Friday, Sept. 11, 2026.
The Weather Service issued the warning at 7:37 p.m. Mountain Time on Thursday, Sept. 10, 2026, covering one zone. The office says a Red Flag Warning means critical fire weather conditions are either occurring now or will shortly, based on criteria for Southeastern Idaho: relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain; thunderstorm coverage of 25 percent without specific rainfall criteria; or other high impact events deemed critical by the National Weather Service and area fire management agencies.
The warning covers the Upper Snake River Valley/Idaho Falls BLM area.
Sep 10, 2026, 9:42 p.m. ETFirst report
Red Flag Warning Issued for Upper Snake River Valley/Idaho Falls BLM for Sept. 11
The National Weather Service in Pocatello, Idaho, issued a Red Flag Warning for the Upper Snake River Valley/Idaho Falls BLM area, according to the warning record. The warning was issued at 7:37 p.m. local time on Sept. 10 and runs from noon to 9 p.m. local time on Sept. 11, 2026. The warning ends at 2026-09-11T21:00:00-06:00.
The warning record states that existing or new fires could grow rapidly. The warning covers one zone.
According to the warning record, a Red Flag Warning means critical fire weather conditions are either occurring now or will shortly, based on criteria for Southeastern Idaho: relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain; thunderstorm coverage of 25 percent without specific rainfall criteria; or other high-impact events deemed critical by the National Weather Service and area fire management agencies.
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Revision history
- Version 111 Sept 2026, 02:27current
First published.
- Version 111 Sept 2026, 02:24current
First published.
- Version 111 Sept 2026, 01:42current
First published.
- Version 111 Sept 2026, 02:24current
First published.
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