Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 272025

Area Forecast Discussion
National Weather Service Boise ID
225 PM MDT Sat May 27 2017

.SHORT TERM...Tonight through Monday...An upper level ridge axis
will drift slowly eastward from near the Pacific Coast to directly
overhead through Monday. This will provide us with mostly clear
skies and warming temperatures. There is sufficient moisture in
the mountains for a chance of showers or thunderstorms each
afternoon/evening, with the better chance being on Monday. Winds
will be light and diurnal in nature. Changes to the forecast were

.LONG TERM...Monday night through Saturday...The upper ridge axis
will remain near the area through Tuesday, but the GFS and ECMWF
are now in better agreement about a trough arriving on the coast
Tuesday evening. This trough is expected to be a peeled off
portion of a larger low anchored off the British Columbia coast.
As this trough moves inland on Wednesday and Thursday, the impact
is still quite unclear as the GFS contains much more moisture and
is depicting more showers and thunderstorms than the ECMWF. Both
models continue to show shortwaves passing by as that larger low
progresses eastward, but again the GFS contains much more
moisture. Nonetheless, the forecast remains on the drier side,
with temperatures well above normal through Wednesday, then about
5 degrees above normal thereafter.


.AVIATION...VFR with clear skies.  Light and variable surface winds.
Winds aloft near 10 KFT MSL: Variable 5-10 kts.





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