731
FXUS65 KBOI 230241
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
841 PM MDT Sun Sep 22 2024

.DISCUSSION...This evening will bring a few high clouds as a
dry cold front moves through the region. These clouds, along
with light west-northwest winds, may keep temperatures slightly
warmer than last night. As of 8:30 PM MDT, satellite imagery
shows no hot spots on the Three Point Fire near Lucky Peak, so
smoke is not expected to be an issue. However, if the fire
becomes active again, light downslope easterly winds could
potentially bring smoke into the Boise metro area overnight.

Looking ahead, the upper-level ridge along the Pacific Northwest
coast is forecasted to shift inland on Monday, causing
temperatures to rise by 2-4 degrees compared to today. This
warming trend is expected to continue through Tuesday and
Wednesday, with temperatures increasing by about 5 degrees each
day for both daytime highs and overnight lows. No updates are
needed at this time.

&&

.AVIATION...VFR. Cirrus clouds. Scattered altocumulus in
northern mountains through 23/15Z. Clearing Monday morning.
Surface winds: northwest 5-10kt tonight, increasing to 10-20kt
Monday, with afternoon gusts 25kt in the central Snake Basin.
Winds at 10kft MSL: Northwest 15-20kt.

KBOI...VFR. Scattered to broken cirrus. Light winds tonight
becoming northwest 10-15kt Monday.

&&

.PREV DISCUSSION...
SHORT TERM...Tonight through Tuesday night...Increasing high
clouds from the northwest tonight as a weak dry cold front
moves through northern and central Idaho. Clouds and breezes
from the front will cause warmer low temps tonight. A Pacific
upper ridge will come inland Monday and quickly end any morning
cooling behind the front. Monday afternoon will end up 2-4
degrees warmer than today. The warming trend will continue
Tuesday into Wednesday as the upper ridge comes fully inland,
averaging about 5 degrees per day on both low and high temps.
Winds Monday will be breezy northwest with afternoon gusts to 30
mph in the Snake Basin from Mountain Home eastward. Lighter
gusts elsewhere. Winds will die down Monday night, then become
light to moderate easterly Tuesday and Tuesday night.

LONG TERM...Wednesday through Sunday...An upper level ridge
will be centered over the area Tuesday, and will bring dry and
warmer weather. As it rapidly moves to the southeast Tue night
and Wed, we will become even warmer as southwest to southeast
winds increase. A weak shortwave trough is forecast to move by
to our north Wed into early Wed night, with excellent ensemble
agreement on the timing and strength. Dry west to southwest flow
aloft should then remain over the PacNW through Saturday, and
precipitation chances are low (a small part of northeast Valley
County gets up to 15% Fri-Sat, but otherwise the chance of
precipitation is too small to mention in the forecast).
Temperatures will cool after a very warm Wed (around 10 degrees
above normal), with readings falling back down to near normal by
Saturday.

&&

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

&&

$$

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DISCUSSION...JDS
AVIATION.....JDS
SHORT TERM...LC
LONG TERM....MC