Idaho Severe Red Flag Warning | Effective 06/21/2026 11:53

Headline: 
Red Flag Warning issued June 21 at 12:53PM MDT until June 22 at 9:00PM MDT by NWS Pocatello ID
Event: 
Red Flag Warning
Urgency: 
Expected
Effective: 
June 21, 2026 - 11:53am
Expires: 
June 22, 2026 - 4:00am
Description: 
...RED FLAG WARNING IN EFFECT FROM 1 PM TO 9 PM MDT MONDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 425... The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 1 PM to 9 PM MDT Monday. * AFFECTED AREA...Fire Weather Zone 425 Middle Snake River Valley/Twin Falls BLM north of the Snake River. * WINDS...West 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Gusty winds and low humidity contributes to rapid fire spread and high intensity should a wildfire get established. Extreme fire behavior can also result.
Instruction: 
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.
Area Description: 
Middle Snake River Valley/Twin Falls BLM north of the Snake River
Forcast Office: 
NWS Pocatello ID