FXUS65 KBOI 051202

AFDBOI



Area Forecast Discussion

National Weather Service Boise ID

602 AM MDT Tue May 5 2026



.UPDATE...Updated aviation discussion.



&&



.KEY MESSAGES...

- Windy conditions this afternoon with northerly winds.



- Isolated afternoon/evening showers and thunderstorms today

  over the mountains of S Idaho and SE Oregon, otherwise dry.



- Above normal temperatures continue with 10-15 degrees above 

  normal by next week.



&&



.SHORT TERM /Through Thursday Night/...

Issued 406 AM MDT TUE MAY 5 2026

Northerly flow will continue over the area as a trough remains

over southern CA, with cool air east of the Rockies and a ridge

over SW British Columbia. Air flow will converge over the 

central ID mountains and Magic Valley, as air from eastern OR 

converges with air from eastern ID and MT moving down the Snake 

Basin. This convergence zone favors isolated showers and 

thunderstorms Tuesday afternoon. Elsewhere windy northerly 

conditions expected Tuesday afternoon with gusts of 30 to 40 

mph. Northwest flow continues into Thursday with dry and breezy

conditions during the afternoon. Temperatures range around 5 to

10 degrees above normal in the short term.



&&



.LONG TERM /Friday through Tuesday/...

Issued 406 AM MDT TUE MAY 5 2026

through the area on Friday afternoon, bringing breezy conditions

and lowering temperatures to near normal. Then the upper level 

ridge redevelops over the western US, with the warmest 

temperatures of the season by next Monday and Tuesday. 

Temperatures rise 15 to 20 degrees above normal with highs of 

85 to 90 degrees in the Snake Basin.



&&



.AVIATION /12Z Tuesday through Wednesday/...

Issued 558 AM MDT TUE MAY 5 2026

VFR. Areas of smoke. Isolated showers/thunderstorms across the 

higher terrain of southeast Oregon and central ID mountains this

afternoon and evening. Gusty erratic outflow winds possible 

with the stronger storms. Surface winds: W-NW 15-25 kt with 

gusts up to 35 kt through the evening. Winds aloft at 10k ft 

MSL: NW-NE 15-30 kt.



KBOI...VFR. Cumulus buildups east of terminal this aft. Surface

winds: SE 5-10 kt this morning shifting to NW 15-20 kt with 

gusts around 30 kt this afternoon.



&&



.BOI WATCHES/WARNINGS/ADVISORIES...

ID...None.



OR...None.



&&



$$



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AVIATION.....KA

SHORT TERM...KA 

LONG TERM....KA