540 

FXUS65 KBOI 282131

AFDBOI



Area Forecast Discussion

National Weather Service Boise ID

231 PM MST Sat Feb 28 2026



.SHORT TERM...Tonight through Monday night...Pacific system will 

move ENE-ward across our southern zones tonight and Sunday with

scattered showers (20-40% coverage), weakening as it moves away

from main upper low near 40/135. We also have isolated thunder-

storms (10% coverage) near the Nevada border this evening. 

Showers will increase in the southern half of our CWA Sunday 

night and Monday as the main upper low comes inland through 

northern California and across northern Nevada. Snow levels 

will stay above 7000 feet MSL in southern areas (where the pcpn

is). Temps will stay mild, more like mid-April than early March.

Monday will be the warmest day in the short term with highs 60 

to 65 in the Treasure Valley and southern Malheur County. Monday

night will be 8-14 degrees cooler than the previous nights 

under clearing skies. Winds will be light and variable through 

Monday morning except 20-30 mph outflow gusts from stronger 

showers. Winds will become west-northwest 10-15 mph later Monday

behind the departing system. 



.LONG TERM...Tuesday through Saturday...Tuesday will be dry and

clear with temperatures about 10 degrees above normal. The 

upper level ridge responsible will quickly move east by Tuesday 

night. Clouds increase ahead of an approaching trough and cold 

front. The frontal passage reduces snow levels to 3500-4500 ft 

MSL by Thursday morning, with widespread precipitation expected 

late Wednesday morning through the evening. Scattered 

precipitation continues Wednesday night through Thursday as the 

moist northwesterly flow behind the frontal remains unsettled. 

Building high pressure in the north Pacific steadily decreases 

precipitation chances each day.



&&



.AVIATION...VFR and overcast. Clouds and showers continue to develop 

across SE OR and SW ID through this evening. As precipitation 

increases expect snow levels to rise to 7-8 kft MSL, ceilings 

dropping to low VFR-MVFR, and a 10% chance of lightning near the

NV border this afternoon. Surface winds: variable 5-15 kt. 

Winds aloft at 10kft MSL: W-SW 15-25 kt.



KBOI...VFR and a less than 10% chance of precipitation this 

afternoon. Wind stays light and variable, favoring NW this afternoon.



Sunday Outlook...Showers expanding northward Sunday. MVFR-IFR 

developing in mtn snow and heavier rain showers with snow levels

6-8 kft MSL. Another 10% chance of afternoon lightning in SE OR

and along the NV-ID border. Surface winds: SW-SE 5-15 kt, gusts

up to 30 kt with storms.



&&



.BOI WATCHES/WARNINGS/ADVISORIES...

ID...None.

OR...None.



&&



$$



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SHORT TERM...LC

LONG TERM....JM

AVIATION.....JM