715
FXUS65 KBOI 221535
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
Issued by National Weather Service Pocatello ID
935 AM MDT Tue Apr 22 2025

.DISCUSSION...Mostly clear skies today under zonal flow aloft.
This will bring above normal temperatures today with light
winds. Overall, not significant change in conditions until the next
cut off low pressures system pushes inland later this week.
Until then, expect gradual warming trend Wednesday and Thursday
with increasing clouds and a slight chance of showers over the
higher terrain along the Nevada border. No update needed at this
time.

&&

.AVIATION...VFR with increasing mid to high clouds today. Isolated
showers across southern areas late tonight. Surface winds: NW-NE 5-
15 kt, becoming variable less than 10 kt tonight. Winds aloft at
10kft: W-SW 10-20 kt.

KBOI...VFR. Surface winds NW 7-13 kt, becoming variable less than 6
kt tonight.

&&

.PREV DISCUSSION...
SHORT TERM...Today through Thursday night...Zonal flow aloft
will bring mostly clear skies today. Flow will shift to SW Wed
through Thu as a deep upper trough forms off the coast. There`s
very little chance of precipitation through Thu morning, but by
Thu afternoon, a chance of showers develops over the eastern
fringe of the area (generally from Valley County south through
the Boise Mountains/Camas Prairie and into Twin Falls County and
southeast Owyhee County). This chance of precipitation decreases
rapidly Thursday night. Winds should be light through the short
term, with temperatures near normal today, warming to 5 to 10
degrees above normal Thursday.

LONG TERM...Friday through Tuesday... Active pattern Friday
through Tuesday. Precipitation chances begin to increase
throughout the day Friday as an upper level trough progresses
east into the CONUS before closing off just to the south of our
area. There is a consistent signal of instability building in
Friday afternoon/evening as the upper trough moves overhead,
allowing for a slight chance (10-20%) of thunderstorms over
higher terrain; this includes eastern Oregon, Southwest ID
Highlands, and over the West-Central Mountains. Precipitation
chances remain elevated through Sunday as the upper closed low
sits overhead. There continues to be a signal for thunderstorms
to be plausible both Saturday and Sunday afternoons.
Precipitation chances begin to decrease from the west to east
through Monday. Drying out area-wide by Tuesday as the trough
exits our area entirely. Temperatures remain seasonable Friday
through Tuesday. Snow levels initially 6-8 kft Friday, dropping
to 4.5-5.5 kft Sunday before rising back to 6-7 kft by Tuesday.


&&

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

&&

$$

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DISCUSSION...JDS
AVIATION.....ST
SHORT TERM...SP
LONG TERM....NF