Idaho State Alert and Warning System (ISAWS)
Red Flag Warning issued June 19 at 12:38PM MDT until June 20 at 9:00PM MDT by NWS Pocatello ID
Headline
Red Flag Warning issued June 19 at 12:38PM MDT until June 20 at 9:00PM MDT by NWS Pocatello ID
Description
...RED FLAG WARNING IN EFFECT FROM 6 AM TO 9 PM MDT SATURDAY FOR
SCATTERED THUNDERSTORMS FOR FIRE WEATHER ZONES 410, 413, 422,
427, 475, AND 476...
The National Weather Service in Pocatello has issued a Red Flag
Warning for scattered thunderstorms, which is in effect from 6 AM
to 9 PM MDT Saturday. The Fire Weather Watch is no longer in
effect.
* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River
Valley/Idaho Falls BLM, Fire Weather Zone 413 Caribou
Range/Caribou NF, Fire Weather Zone 422 Sawtooth
Range/Northern Sawtooth NF, Fire Weather Zone 427 Goose Creek
and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM
south 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.
* IMPACTS...Critical fire weather conditions are expected
Saturday. Lightning may generate new fire starts. Any new fire
starts or existing fires may spread rapidly.
* THUNDERSTORMS...25 to 45 percent coverage.
* OUTFLOW WINDS...Stronger storms will be capable of producing
wind gusts up to 55 mph.
Instructions
A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly based on these 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.
- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.
Additional Details
| Type | Alert |
| Phenomena | Fire Weather |
| Severity | Warning |
| Event Code | NWS |
| Area | Upper Snake River Valley/Idaho Falls BLM; Caribou Range/Caribou NF; Sawtooth Range/Northern Sawtooth NF; Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls BLM south of the Snake River; East Salmon River Mountains/Salmon NF; Lemhi and Lost River Range/Challis NF |
| Sent | Friday, June 19, 2026 12:38 PM MDT |
| Expires | Saturday, June 20, 2026 9:00 AM MDT |
| Sender | NWS Pocatello ID |
| Id | urn:oid:2.49.0.1.840.0.62ca6b45665e65ce3b9a24113a5a58398422eba4.001.2 |