FXUS65 KPIH 041830

AFDPIH



Area Forecast Discussion

National Weather Service Pocatello ID

1230 PM MDT Mon May 4 2026



.KEY MESSAGES...



- Unsettled conditions return this afternoon and Tuesday with

  isolated mainly mountain thunderstorms today and more

  widespread activity tonight and Tuesday.



- Lake Wind Potential Tuesday with cooler conditions

  in northeast winds.



- Another round of Frost/Freeze Wednesday AM.



&&



.DISCUSSION...

Issued at 305 AM MDT Mon May 4 2026



Will have minor instability today and expect nothing more than

isolated mainly mountain showers and thunderstorms this

afternoon. Will get a strengthening low pressure system to the

south and northerly flow aloft sets up Tuesday with a back door

cold front moving through. After extremely warm highs in the 70s

lower elevations today and 60s mountains will see significant

cooling Tuesday with about a 10 to 15 degree temperature drop.

Some impacts will be a likely Lake Wind Advisory for American

Falls Reservoir Tuesday in strong northeast flow, and the

potential for more freeze warnings Wednesday morning behind the

cold front. The threat for showers will end Tuesday night with

dry conditions expected Wednesday. The cooler conditions will 

continue through Wednesday then another significant warming 

trend sets up Thursday into Friday. Low elevation highs back 

into the 70s. Will see a chance of showers Saturday with another

upper level system. Through next Monday will see changing 

temperatures but mainly above normal into next week. Will have 

intermittent breezy conditions but no significant winds 

expected in the long term period.



&&



.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/...

Issued at 1228 PM MDT Mon May 4 2026



Have maintained PROB30s for thunderstorms this afternoon at KSUN and 

KDIJ. VCSH is forecast at KPIH and KIDA this afternoon through the 

first part of Tuesday, with VCSH at KBYI beginning around 09z 

tonight. VFR CIGs and VIS are anticipated unless a direct 

thunderstorm impact leads to degradation. Winds will increase 

beginning overnight tonight and remain elevated Tuesday as a 

cold front swings through, with gusts 20 to 25 kts at all sites

except for KDIJ.



&&



.PIH WATCHES/WARNINGS/ADVISORIES...

None.



&&



$$



DISCUSSION...GK

AVIATION...Cropp