Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 290238

Area Forecast Discussion
National Weather Service Boise ID
838 PM MDT Wed Jun 28 2017

.DISCUSSION...No updates this evening.  Upper trough moving
east tonight and out of our area Thursday as next upper ridge
comes in from the eastern Pacific.  Clear skies and decreasing
northwest winds tonight and Thursday.  Light winds and warmer
Friday, as thermal surface low pressure forms in eastern Oregon.


.AVIATION...VFR. Mostly clear with areas of smoke.  Surface winds
generally NW 5-15kt. Winds aloft at 10kft MSL: W-NW 15-25kt.


SHORT TERM...Tonight through Friday...
Drier and more stable air is spreading across the forecast area
this afternoon in northwest flow. A shower or thunderstorm
remains possible across the northern-most mountains and south
of Twin Falls until around sunset. Otherwise, dry conditions
expected tonight. Dry Thursday and Friday as an upper level
trough over the area moves east and a ridge begins building
in. Western portions of the forecast area will warm slightly on
Thursday while most of the Idaho side stays near persistence.
Temperatures will trend up several degrees throughout the forecast
area Friday. Pressure gradient will relax resulting in decreasing
winds the next couple of days.

LONG TERM...Friday night through Wednesday...An upper level ridge
will weaken slightly Saturday as a shortwave passes through the
Pacific Northwest. Expecting a slight chance of showers and
thunderstorms in the afternoon and evening, generally north of a
Baker-Council-Challis line. Ridging will return briefly to the area
Sunday before a southwest flow sets up over the region for the
beginning of the next week. Temperatures will be 3-6 degrees above
normal through the July 4th holiday.





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