Area Forecast Discussion
Issued by NWS Boise, ID

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FXUS65 KBOI 270238

Area Forecast Discussion
National Weather Service Boise ID
838 PM MDT THU MAY 26 2016

.DISCUSSION...Isolated showers still exist in Owyhee county and
Northern Malheur county as of 8:30 pm MDT. Current forecast
cleared these showers out a bit too early, so have updated for
slight chance to continue for the next few hours. Otherwise,
the rest of the forecast looks on track as thunderstorm coverage
will be significantly less tomorrow than it has been the past few


.AVIATION...VFR. SCT to BKN mid/high level ceilings. Isolated
showers diminishing overnight. Surface winds: 10kt or less overnight
becoming W to NW 5-15kt, with gusts up to 25kt southeast of Boise
into Magic Valley Fri afternoon. Winds aloft at 10KFT MSL: W to NW


SHORT TERM...Tonight through Saturday...a new upper level trough
will approach from the northwest tonight and bring northwest flow
aloft to the region tomorrow. This flow will back to zonal as a
cutoff low forms over California on Saturday. This trough will
push a cold front through the area late tonight through the first
half of Friday...bringing gusty NW winds and cooler temps. Highs
tomorrow will be around 5 degrees cooler than today. With the
zonal flow Saturday, temps will warm back up a few degrees, ending
up a few degrees below normal. Showers and thunderstorms will be
most numerous over the higher terrain of the Idaho side this
afternoon and evening. Tomorrow afternoon and evening, as drier
air moves in, the best chance for showers and thunderstorms will
be in northeast Baker County, the higher terrain of the West-
Central and Boise mountains, and in southern Twin Falls County.
With even more dry air moving in Saturday, there will be no
showers in the forecast. Winds behind the front tomorrow will gust
to around 25 mph in the Western Magic Valley and in the Upper
Treasure Valley from near Mountain Home eastward.

LONG TERM...Saturday night through Thursday...Zonal flow
Saturday night into Sunday will keep things dry. Influence of an
upper level trough will be felt Sunday evening into early Monday,
with chances of precipitation, mostly in higher terrain in Baker
County and the West Central Mountains. Ridging off the coast
starts to build Monday morning pushing this trough east.
Temperatures start to rise with the building of this ridge to 10+
degrees above normal by Wednesday. Thursday looks to be the
hottest day with temperatures right around 90F for the Boise area.
Next upper low starts to make its way inland by Thursday
afternoon which will increase chances of precipitation, especially
for Baker County.





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