Oreana, Idaho Weather Forecast Discussion

812
FXUS65 KBOI 252009
AFDBOI
Area Forecast Discussion
National Weather Service Boise ID
209 PM MDT Thu Sep 25 2025
.SHORT TERM...Tonight through Saturday night...Latest models bring
a dry Pacific cold front across eastern OR tonight between 9 PM
and midnight PDT, and western ID between midnight and 6 AM MDT.
Clouds from the upper low in Calif will clip the CWA/NV border
ahead of the approaching frontal band. Post-frontal winds will
mix out the usual sunrise low-level inversion and low temps
tonight should be several degrees warmer than last night. Friday
should be 10 degrees cooler than today with brisk west/northwest
winds 10-20 mph, and gusts as strong as 35 mph between Mountain
Home and Gooding ID Friday morning. The entire system will move
rapidly east out of our area Friday, and a flat upper ridge
will come in Friday night through Saturday night. Saturday`s
high temps will be 6-8 degrees warmer than Friday along with
sunny skies and lighter wind.
.LONG TERM...Sunday through Thursday...Sunday will be the last
day of warm and dry weather before a pattern change unfolds
early next week. Temperatures will peak around 10 degrees
above normal on Sunday as southwest flow strengthens ahead of
a deepening trough. Monday will see temperatures cool 10-15
degrees from Sunday with increasing chances of precipitation as
the trough advances to the coast. Models remain consistent in
advancing the low pressure through the Pac NW Tue/Wed bringing
widespread rainfall to SE Oregon and SW Idaho. The cooler air
aloft will drop snow levels to around 8kft MSL by Wednesday
morning and reduce high temperatures to 5-10 degrees below
normal (lower 50s/mtns to mid 60s/valleys). Precipitable water
amounts will reach the 90+ percentile and forecast water totals
through Wednesday afternoon are pointing to 0.25-0.75" amounts
at lower elevations with 0.75-1.5" amounts in the mtns. The
forecast for Thursday still shows a drying trend, though the
GFS has one more upper trough that could extend precipitation
chances before upper ridging takes hold to end the week.
&&
.AVIATION...VFR. Dry cold front with scattered-broken mid-
level clouds overnight into early Friday. Surface winds: E-SE
5-15 kt ahead of the front, becoming NW 10-20 kt with gusts to
30 kt after 05Z Friday. Winds aloft at 10kft MSL: S-SE 5-15 kt,
becoming NW 15-25 kt after 05Z Friday.
KBOI...VFR. Dry cold front to bring a wind shift around 09Z Friday.
Surface winds: SE up to 10 kt, becoming WNW 10-20 kt around 09Z
Friday.
Weekend Outlook...VFR through Sunday night high pressure builds in
behind the dry cold front. Increasing high clouds and SE wind late
Sunday ahead of a strong Pacific trough slated to impact the region
Monday through Wednesday.
&&
.BOI WATCHES/WARNINGS/ADVISORIES...
ID...None.
OR...None.
&&
$$
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SHORT TERM...LC
LONG TERM....DG
AVIATION.....LC

NWS BOI Office Area Forecast Discussion