Jerome, Idaho 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

719
FXUS65 KBOI 282135
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
235 PM MST Fri Nov 28 2025

.SHORT TERM...Tonight through Sunday night...A cold front has
moved through the area and mixed out the fog in the lower
valleys this afternoon with breezy west to northwest winds.
Strongest winds will be in the Magic Valley with gusts to
35-40 mph this afternoon. Any lingering showers will taper off
this afternoon. Fog is forecast to redevelop in the valleys
tonight into Saturday morning, with the best chance coming along
the foothills in the Boise metro, to the Magic Valley, Baker
Valley and around Burns OR. Another system and cold front
arrives late Saturday night into Sunday morning. First snow of
the season possible for many valleys locations on Sunday morning
with a dusting of snow. Snow accumulations will be generally
under an inch in the valleys and 1 to 3 inches in the mountains.
Precipitation will taper off midday on Sunday with breezy
northwest winds during the afternoon and partial clearing.

.LONG TERM...Monday through Friday...North-northwesterly flow
aloft on Monday will keep temps seasonal through the long
term, as most of the polar airmass is in the north-central
CONUS. Though, the position of the jet overhead will carry a
couple shortwave troughs through the area. The first arrives
Tuesday and Wednesday with precipitation chances 20-40% in lower
elevations and 60-70% in high elevations. Rainfall/liquid
equivalent forecast during this system is a trace to 0.03 inches
for lower elevations and up to 0.2 inches for higher
elevations. With snow levels at 3-4 kft MSL, locations above
that will see 0-2 inches of snow. Models split in the track of
the low aftwards, but the favored solution is to amplify the
shortwave into a closed low and then cut off low west of
California. This would wedge high pressure between the low and
the jet, pushing the storm track mostly north of the area. This
would keep skies cloudy as waves pass to north, but otherwise be
mostly dry. The GFS deterministic and a few ensemble members
keep the Tues/Wed low amplified but within the stream,
preventing development of a cut off low. This would push the
higher pressure further south and open up the possibility of
more active weather Friday and Saturday. Again, the cut off low
solution is more favored, but there is uncertainty about the
forecast later next week.

&&

.AVIATION...Fog/stratus has mostly lifted to VFR, with lingering
LIFR as fog finishes clearing. Scattered rain/snow continues in
the central ID mtns, continuing to dissipate this afternoon.
Tonight LIFR fog/stratus returns to basins in SE OR and the
Snake Plain. Snow levels: 4-5k feet MSL. Mountains obscured.
Surface winds: becoming WNW 10-25 kt with gusts 20-35 kt this
afternoon, strongest from KMUO to KJER/KTWF. Winds aloft at
10kft MSL: W to NW 15-30 kt.

KBOI...Cold front has cleared the fog, but low VFR ceilings
remain. Skies may become briefly scattered this afternoon
before fog/stratus returns to the area tonight. Surface winds
NW 7-15 kt with gusts 18-25 kt, becoming light and variable
just before midnight.

Weekend Outlook...A 30-50% chance of snow Saturday night into
Sunday morning, with snow levels on valley floors. MVFR to
LIFR in snow with mountain obscuration across the area. Surface
winds: E-SE 5-15 kt Saturday, becoming W-NW 5-15 kt with
afternoon gusts 15-25 kt Sunday.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.
OR...None.

&&

$$

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SHORT TERM...KA
LONG TERM....JM
AVIATION.....JM