Fairfield, Idaho Weather Forecast Discussion

352
FXUS65 KBOI 071006
AFDBOI
Area Forecast Discussion
National Weather Service Boise ID
406 AM MDT Sun Sep 7 2025
.SHORT TERM...Today through Tuesday night...An upper level
trough remains off the northern CA coast. Southwest flow has
developed over the area. Drier air will move into the area today
from the southwest. There is enough residual moisture for
showers and thunderstorms to form (20-30 percent chance) over
the central ID mountains, southwest ID highlands south of Twin
Falls and the Blue Mountains this afternoon. Drier air will
suppress shower and thunderstorm development over much of the
eastern OR basins and the Snake Basin this afternoon. The dry
slot continues into Monday with breezy west-southwest winds
during the afternoon. Afternoon low RHs and breezy conditions
will be a fire concern over eastern OR and southwest ID
highlands on Sunday and Monday. The upper level trough slowly
moves inland on Tuesday with a cold front moving through the
area. The cold front will bring a 20-30 percent chance of
precipitation to the area, with the exception of the west
central ID and Baker County mountains where there is a 40-60
percent chance.
.LONG TERM...Wednesday through Sunday...The trough will be slow
to move across the area through the long term. The trough brings
cooler conditions and a 20-50 percent chance of showers and a
10-20 percent chance of thunderstorms through Saturday.
Temperatures lower to 5-10 degrees below normal Wednesday
through Saturday before moderating to near normal after the
system moves eastward on Sunday.
&&
.AVIATION...VFR. Scattered showers and thunderstorms near KJER
KTWF KMYL KBKE this afternoon. Surface winds: variable 5-10kt
becoming SW-NW 5-15kt during the afternoon, except gusts up to
35kt near showers and storms. Winds aloft at 10kft MSL: SW
10-20kt.
KBOI...VFR. SE 5-10kt this morning, shifting to NW 5-10kt during
the afternoon.
&&
.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.
OR...None.
&&
$$
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SHORT TERM...KA
LONG TERM....KA
AVIATION.....KA

NWS BOI Office Area Forecast Discussion