001
FXUS65 KBOI 212016
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
216 PM MDT Sat Sep 21 2024

.SHORT TERM...Tonight through Monday night...Little change
through Sunday under dry northwest flow aloft. A band of high
clouds passing through tonight will have little effect on low
temperatures. High clouds will increase again in northern areas
late Sunday and southern zones Sunday night as a weak, dry cold
front passes through. The clouds and post-frontal northwest
winds will inhibit the usual nighttime inversion and low temps
Monday morning will be several degrees warmer. Lighter winds and
fewer clouds Monday night will allow the inversion but low temps
will be only slightly cooler as a warming Pacific upper ridge
will also be coming inland. High temps Sunday and Monday will
be close to normal, much like today. The autumnal equinox occurs
at 644 AM MDT Sunday.

.LONG TERM...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.

&&

.AVIATION...VFR. Clear skies or cirrus clouds. Surface winds:
Variable less than 10kt. Winds at 10kft: Variable around 10 kt.

KBOI...VFR. Light and variable wind.

Sunday Outlook...VFR. Clear skies in the morning. Increasing
high clouds north in the afternoon. Variable surface winds
less than 10 kt.

&&

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

&&

$$

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SHORT TERM...LC
LONG TERM....SP
AVIATION.....LC