407
FXUS65 KBOI 061213
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
513 AM MST Fri Mar 6 2026

.UPDATE...Updated aviation discussion.

&&

.KEY MESSAGES...
- Quiet and dry conditions will prevail through the weekend as a
  high pressure ridge builds over the Intermountain West.

- A Canadian trough will bring precipitation chances to the
  north, and strong gusty winds Monday through Friday.

&&

.SHORT TERM /Through Sunday Night/...
Issued 314 AM MST FRI MAR 6 2026
An upper level ridge builds in across the region through the
period. A weak shortwave moving around the top of the ridge will
introduce some high level cloudiness, but no significant
precipitation is expected for the lower elevations. There is a
slight chance (20 to 40 percent) of light snow or rain showers
over the west central Idaho mountains and near Baker County,
Oregon, though accumulations will be minimal.

The warming trend will continue through the weekend. Highs on
Saturday will return to around 5 degrees above normal, with
Sunday seeing another jump as the ridge axis moves inland. By
Sunday afternoon, many valley locations will see temperatures
reaching the mid 50s to near 60 degrees. Winds will generally be
light under the influence of the ridge, though north to
northwest flow may still produce some gusts up to 20 mph in the
Magic Valley and across the higher terrain of southeast Oregon
during the afternoon hours.

Sunday night will remain dry and mild compared to previous
nights, with increasing clouds ahead of a cold front scheduled
to arrive early next week. Conditions should remain favorable
for any outdoor activities or travel through the end of the
period.

&&

.LONG TERM /Monday through Friday/...
Issued 314 AM MST FRI MAR 6 2026
A broad, polar trough over Canada will advance southward on
Monday and establish a strong jet stream across the northern
U.S. As the cold airmass encroaches on the forecast area, the
intensifying pressure gradient will enhance surface winds area-
wide and also increase precipitation chances across northeast
Oregon and west- central Idaho. This will support light snowfall
for those northern areas as snow levels fall from 3500-4500
feet down to valley floors Monday night and Tuesday. This
transition will lower temperatures across southeast Oregon and
southwest Idaho by 5-10 degrees for Monday, and an additional
5-10 degrees for Tuesday.

Warmer air will advect in from the west on Wednesday and briefly
shift the cold airmass out of the area. While this will raise
temperatures and snow levels, persistent moisture and strong
westerly flow will maintain precipitation chances for the north and
gusty surface winds throughout the day. The milder temperatures on
Thursday will cool Thursday night into Friday as a secondary cold
front arrives. This will reinforce the wintry pattern and extend
precipitation chances (20-40%) farther south into east-central
Oregon and much of southwest Idaho. As a result, additional snowfall
is possible across the higher terrain, with the potential for light
snow at/near valley floors for the north.

&&

.AVIATION /12Z Friday through Saturday/...
Issued 513 AM MST FRI MAR 6 2026

Mainly VFR. Patchy LIFR-IFR from fog and low clouds for mtn
valleys, and near KJER/KTWF this morning. Virga across northern
mountains today. Showers increasing around KBKE/KMYL after
Sat/06Z with snow levels 4-6kft MSL. Surface winds: W-NW 5-15
kt. Gusts 20-30 kt from KBOI to KTWF/KJER today. Winds aloft at
10kft MSL: N-NW 15-30 kt.

KBOI...VFR. Light rain mid to late Sat morning, creating low
VFR-MVFR ceilings. Surface winds: NW 5-10 kt, increasing to
10-15 kt with gusts around 20 kt this afternoon.

Weekend Outlook...LIFR-IFR conditions in patchy valley fog each
morning. Low VFR to IFR in rain/snow and low clouds Saturday.
Mtn obscuration. Mainly VFR and dry Sunday, except isolated
showers over the northern mountains. Snow levels: 4-6kft MSL Sat
AM rising to 6-8kft MSL by Sat PM. Surface winds: SW-NW 5-15
kt, afternoon gusts to 20 kt.

&&

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

OR...None.

&&

$$

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AVIATION.....SH
SHORT TERM...JDS
LONG TERM....SH