764
FXUS65 KBOI 082023
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
223 PM MDT Wed May 8 2024

.SHORT TERM...Tonight through Friday night...Continuing through
Thursday, a persistent northeasterly flow aloft prevails across
the region, driven by an upper-level low situated over the
Northern Plains. This atmospheric setup maintains the potential
for isolated showers this afternoon in areas, including the
Boise Mountains, Upper Treasure Valley east of Mountain Home,
Western Magic Valley, and southern Twin Falls County. Elsewhere,
expect partly cloudy skies to persist into Thursday. Breezy
conditions will persist across the area until early evening,
particularly east of Boise from Mountain Home through Glenns
Ferry, with gusts reaching up to 40 MPH before diminishing by
sunset.

A gradual shift towards warmer and drier conditions is
anticipated as an upper-level ridge expands eastward into the
northern Rockies. However, the presence of a cut-off low over
the four-corners region inhibits the eastward movement of the
ridge over the Intermountain West, resulting in the warmest
temperatures remaining west of the divide. Thursday and Friday
are expected to feature mostly clear skies and lighter winds
across most of the forecast area, with the exception being
south-central Idaho on Thursday afternoon, where northeasterly
flow may trigger isolated showers in the Western Magic Valley
and Southern Twin Falls.

Temperatures are forecasted to rise to
about 10 degrees above today`s highs on Thursday, which is
approximately 3 to 4 degrees above normal. An additional 5 to 7
degrees of warming is expected on Friday, with temperatures
reaching the upper 70s in the lower valley.

.LONG TERM...Saturday through Wednesday...High confidence in
much warmer and drier conditions this weekend through the middle
of next week as an upper ridge builds across the Pacific
Northwest. High temperatures will be 5 to 15 degrees above
normal during this period, with many locations reaching the 80
degree mark Sunday and Monday. Dry conditions will also prevail,
with exception to weak instability developing on Sunday and
Monday leading to a very low chance (5-10%) of isolated
afternoon thunderstorms.

&&

.AVIATION...VFR. Virga/very light showers possible south and east of
KBOI. Skies clearing overnight. Sfc winds: W-N 10-20 kt with gusts
to 25 kt, except 15-25 kt with gusts to 35 kt from vicinity KMUO SE
to KJER/KTWF. Winds at 10k ft MSL: NE 10-25 kt.

KBOI...VFR with decreasing mid and high clouds. Sfc winds: 10-20 kt
with gusts to 25 kt this afternoon. Becoming light and variable
overnight.

&&

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

&&

$$

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SHORT TERM...JDS
LONG TERM....JR
AVIATION.....JR