FXUS65 KBOI 152028
Area Forecast Discussion
National Weather Service Boise ID
228 PM MDT Sat Jun 15 2019
.SHORT TERM...Tonight through Tuesday...A low amplitude upper level
ridge over the northwest coast will keep our area warm with mostly
sunny skies through the rest of this weekend. The exception will be
the west central Idaho and Boise Mountains, where models show
increasing moisture and instability. This will contribute to the
formation of afternoon and evening thunderstorms both Sunday and
Monday, triggered by weak disturbances in the light west-northwest
flow aloft. Thunderstorms are not expected on Tuesday as drier more
stable air moves into our area.
.LONG TERM...Tuesday night through Saturday...
Northwest flow will continue through the extended period with a
strong high pressure off the West Coast, this will keep temperatures
around 5 degrees above normal through Wednesday. A trough will begin
to form over the Pacific NW after Wednesday, bringing much cooler
temperatures (around 10 degrees below normal) and breezy conditions.
Precipitation will generally remain to the north through Saturday.
Precipitation chances may increase early next week.
.AVIATION...VFR under mostly clear skies. Cumulus buildups
over the central ID mountains this afternoon. Surface winds:
northwest 5-15kt this afternoon, otherwise light and variable. Winds
aloft at 10KFT MSL: west-northwest 5-15kt.
Sunday Outlook...VFR. Isolated afternoon thunderstorms over the
central Idaho mountains.
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