FXUS65 KBOI 221128

AFDBOI



Area Forecast Discussion

National Weather Service Boise ID

528 AM MDT Sun Mar 22 2026



.UPDATE...Updated aviation discussion.



&&



.KEY MESSAGES...

- Warm, slightly above normal temperatures and dry conditions will

  continue through the middle of next week.



- Another cold front will move through the region midweek, 

  bringing mountain showers and slightly cooler temperatures.



&&



.SHORT TERM /Through Tuesday Night/...

Issued 315 AM MDT SUN MAR 22 2026

Lighter winds and cooler temperatures are expected today, 

especially compared to the record shattering temperatures last 

week. Valley highs will reach the low 60s, still 3-5 degrees 

above normal for this time of year. Dry and partly cloudy skies 

will continue as a ridge of high pressure builds back in over 

the region through Monday. Temperatures will climb to 10-15 

degrees above normal on Monday and Tuesday, peaking on Tuesday 

ahead of another week frontal passage. Late Tuesday, an 

atmospheric river will move into the Pacific Northwest. This 

will increase chances of showers (30-50%) and cool temperatures 

slightly across high elevations in southeast Oregon and in the 

West Central ID Mountains. Models remain consistent in the 

northward progression of the bulk of the moisture, so confidence

is low in any meaningful shift to the weather in area valleys 

during the short term period.



&&



.LONG TERM /Wednesday through Sunday/...

Issued 315 AM MDT SUN MAR 22 2026

The Gulf of Alaska upper-level trough will continue to cause 

precipitation chances and gusty winds until late Wednesday/early

Thursday. An embedded upper-level shortwave will move a cold 

front through the area Wednesday afternoon into evening, with 

precipitation chances (30-50%) limited to higher elevations in 

our northern zones. Snow levels start around 8000 ft MSL when 

precipitation begins, before lowering to near 3000 ft MSL by 

precipitation ending. Beginning Thursday, the upper-level ridge 

looks to rebuild over the Western CONUS and bring temperatures 

above normal again (with temps 5-10 degrees above average by 

Saturday). By Sunday, one cluster solution and some 

deterministic model runs hint at an upper-level trough moving 

onshore into the Pacific NW, bringing precipitation and cooler 

temperatures.



&&



.AVIATION /12Z Sunday through Monday/...

Issued 528 AM MDT SUN MAR 22 2026 VFR conditions with scattered

high cloud coverage. Surface winds: variable less than 10 kts, 

except W-NW 10-15 kt with gusts 20-25 kt from KMUO to KTWF/KJER.

Winds aloft at 10K feet:

W-NW 5-20 kt.



KBOI...VFR. Surface winds: W-NW 10 kt or less.



&&



.BOI WATCHES/WARNINGS/ADVISORIES...

ID...None.



OR...None.



&&



$$



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AVIATION.....CH

SHORT TERM...SA

LONG TERM....CH