Arock, Oregon Weather Forecast Discussion

870
FXUS65 KBOI 081023
AFDBOI
Area Forecast Discussion
National Weather Service Boise ID
423 AM MDT Mon Sep 8 2025
.SHORT TERM...Today through Wednesday night...A well defined
upper level trough remains off the northern CA coast on
satellite this morning. Southwest flow continues today with a
dry slot over the area today. This feature will provide breezy
southwest winds this afternoon over the higher terrain of
eastern OR and southwest ID. Temperatures will be around 5
degrees above normal today. The upper level trough slowly moves
inland on Tuesday with increasing clouds and cooler
temperatures. Isolated showers and thunderstorms develop early
Tuesday morning across the Idaho zones with a 10-20 percent
chance of precipitation, and develop over eastern OR later in
the day. The trough moves inland over southcentral OR on
Wednesday with a 40-60 percent chance of precipitation and a
10-20 percent chance of thunderstorms. The NAM and Canadian are
much deeper with the upper level trough and have much higher
amounts of precipitation wrapping around the system, while the
EC and GFS are less impressive. Temperatures lower to around 10
degrees below normal on Wednesday.
.LONG TERM...Thursday through Monday...The trough will be slow
to move across the area through Friday, with a 20-50 percent
chance of showers and a 10-20 percent chance of thunderstorms
through Friday. Drier and slightly warmer conditions on
Saturday between systems. Another trough moves through the area
on Sunday and Monday with slightly cooler temperatures and a
20-40 percent chance of precipitation. Temperatures will be
around 10 degrees below normal on Thursday, warming to near
normal by Saturday, and 3-5 degrees below normal Sunday and
Monday.
&&
.AVIATION...VFR. Isolated showers and thunderstorms NW of KBKE
KBNO this afternoon. Surface winds: SW 5-15kt, strongest over
eastern OR and SW ID highlands, becoming NW 10-20kt in eastern
OR in the evening. Winds aloft at 10kft MSL: SW 10-20kt.
KBOI...VFR. SE 5-10kt, becoming NW 5-10kt during the afternoon.
&&
.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.
OR...None.
&&
$$
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SHORT TERM...KA
LONG TERM....KA
AVIATION.....KA

NWS BOI Office Area Forecast Discussion