008
FXUS65 KBOI 270845
AFDBOI

Area Forecast Discussion
National Weather Service Boise ID
245 AM MDT Thu Jun 27 2024

.SHORT TERM...Today through Saturday night...A cold front moved
across eastern Oregon late Wednesday evening and western Idaho
early this morning, shifting all the convective weather east and
out of our CWA. Today will be mostly sunny, breezy from the
northwest, and much cooler and drier than yesterday, with high
temps only in the mid 70s to lower 80s in the lower valleys
and mid 60s to mid 70s in the mountains and higher valleys. An
exception will be in Valley County where light rain showers will
linger today. Also, patchy smoke due to wildfires will be found
in southern areas today and possibly longer. The cooling is due
to an upper trough from the Gulf of Alaska moving inland across
the northwestern US. Low temps Friday morning will be in the
mid 40s to lower 50s in the valleys and mid 30s to mid 40s in
the mountains. Friday will begin another warming trend as the
upper trough exits east. Expect 1 to 3 degrees warming over
today in Idaho and 3 to 6 degrees warming in Oregon with sunny
skies in all areas. An upper ridge will bring another 10 to 15
degrees warming to all areas on Saturday with high temps in the
80s and 90s, but without the monsoon moisture and thunderstorms
like we had yesterday.

.LONG TERM...Sunday through Thursday...The next Pacific trough
will arrive over the western U.S. this weekend, with the cold
front expected to move through southeast Oregon and southwest
Idaho on Sunday. This front will introduce cooler temperatures,
breezy winds, and a chance for showers and thunderstorms both
Sunday and Monday. Latest model guidance has reduced the extent
of the shower/thunderstorm threat, however, keeping only a
chance (15-30%) over west-central Idaho. Monday should be the
coolest day of the week, then dry west-northwest flow will
develop through the rest of the week and allow temperatures to
trend a few degrees warmer each day. By Thursday, temperatures
will climb to around 10 degrees above normal as high pressure
strengthens over California and Nevada.

&&

.AVIATION...Generally VFR. Areas of smoke/haze from regional
wildfires may reduce visibility. Surface winds: W to NW 5-15 kt.
Afternoon gusts up to 25-30 kt (mainly s-central ID). Winds aloft
at 10kft MSL: SW to W 15-30 kt.

KBOI...Generally VFR. Areas of smoke/haze from regional
wildfires may reduce visibility aloft. Surface winds: NW 10-15
kt, with 20-25 kt gusts arriving late this morning.

Weekend Outlook...Generally VFR. Potential for smoke/haze to
continue. Increasing clouds Sunday, with chance (15-30%) of
afternoon showers and thunderstorms over west-central Idaho
mountains. Daytime surface winds: W to NW 5-15 kt Friday
through Sunday, except gusts up to 25-30 kt Sunday.

&&

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

&&

$$

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SHORT TERM...LC
LONG TERM....SH
AVIATION.....SH