ID WFO POCATELLO Warnings, Watches, and Advisories

WFO POCATELLO Warnings, Watches and Advisories for Thursday, September 12, 2024

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RED FLAG WARNING

URGENT - FIRE WEATHER MESSAGE

National Weather Service Pocatello ID

155 PM MDT Wed Sep 11 2024

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 2 AM MDT THURSDAY FOR

THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR IDAHO FIRE WEATHER

ZONES 422, 475 AND 476...

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 2 AM MDT THURSDAY FOR

SCATTERED THUNDERSTORMS FOR IDAHO FIRE WEATHER ZONES 422, 475 AND

476...

* AFFECTED AREA...Fire Weather Zone 422 Sawtooth Range/Northern

Sawtooth NF, Fire Weather Zone 475 East Salmon River

Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost

River Range/Challis NF.

* IMPACTS...New lightning starts are possible with gusty outflow

winds potentially leading to rapid growth of new or existing

fires.

* THUNDERSTORMS...Isolated to scattered coverage through the

overnight hours.

* OUTFLOW WINDS...35 to 45 mph. Stronger storms may produce

gusts to 60 mph.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

The National Weather Service in Missoula has issued a

* Flash Flood Warning for...

The Moose Fire Burn Scar in...

Northwestern Lemhi County in east central Idaho...

* Until 400 PM MDT.

* At 157 PM MDT, Doppler radar indicated thunderstorms producing

heavy rain over the Moose Fire Burn Scar. Flash flooding is

ongoing or expected to begin shortly.

Excessive rainfall over the burn scar will result in debris flow

moving through the Middle Salmon-Panther. The debris flow can

consist of rock, mud, vegetation and other loose materials.

HAZARD...Flash flooding caused by thunderstorms in and around

the Moose Fire Burn Scar.

SOURCE...Radar.

IMPACT...Flooding of areas in and around the Moose Fire Burn

Scar.

Move away from recently burned areas. Life-threatening flooding of

creeks, roads and normally dry arroyos is likely. The heavy rains

will likely trigger rockslides, mudslides and debris flows in steep

terrain, especially in and around these areas.

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