# Red Flag Warning: Upper Snake River Valley/Idaho Falls BLM; Sawtooth Range/Northern Sawtooth NF; Middle Snake River Valley/Twin Falls BLM north of the Snake River; East Salmon River Mountains/Salmon NF; Lemhi and Lost River Range/Challis NF — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/d97f2d004e2a737a

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-08-02 01:04 ingested 2026-08-02 08:28

[original source ↗](http://www.weather.gov/)

## extract

Red Flag Warning — Upper Snake River Valley/Idaho Falls BLM; Sawtooth Range/Northern Sawtooth NF; Middle Snake River Valley/Twin Falls BLM north of the Snake River; East Salmon River Mountains/Salmon NF; Lemhi and Lost River Range/Challis NF
Severity: Severe. Certainty: Likely.
* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
Valley/Idaho Falls BLM, Fire Weather Zone 422 Sawtooth
Range/Northern Sawtooth NF, Fire Weather Zone 425 Middle Snake
River Valley/Twin Falls BLM north of the Snake River, Fire
Weather Zone 475 East Salmon River Mountains/Salmon NF and
Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF.

* WINDS...West to southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...10-15 percent.

* IMPACTS...Wind and low humidity can lead to rapid spread of
fire and more intense fire in receptive fuels.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.