Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 211016

Area Forecast Discussion
National Weather Service Pocatello ID
316 AM MST Tue Nov 21 2017

.SHORT TERM...Tonight through Thanksgiving.

Light moisture from the northwest continues to stream through the
region this morning. Expect a break as a ridge begins to build over
the region. Looks like another push of moisture will arrive late
this afternoon and this evening. This will spread some precipitation
from the central Idaho mountains into upper Snake highlands. Snow
levels are high, expected to be above 8500 feet by tonight. So, not
expecting impacts from snow. This moisture will slowly diminish
during the day on Wednesday as the ridge continues to amplify,
effectively shifting the moisture well north. Looking at mostly dry
and warm weather Wednesday night into Thanksgiving. A weak system
will approach the region by Thanksgiving afternoon which could
produce some light precipitation, by the afternoon across the
central Idaho mountains. Snow levels on Thursday look very high,
above 9500 feet.


.LONG TERM...Thursday night through next Tuesday. High pressure
ridging will dominate through the majority of the period. However,
models continue to be in good agreement showing light moisture
working over the ridge impacting the Central Mountains and Upper
Snake Highlands Thursday night into Friday. On Monday models are in
fair agreement in bringing a stronger system across the area
bringing moderate precipitation into Tuesday morning. Expect near
record temperatures on Thanksgiving, almost 20 degrees above normal.
Temperatures will moderate some Friday, only 10 to 15 degrees above
normal, before rising back to 15 to 20 degrees above normal for the
weekend. Temperatures will again moderate by Tuesday, but still be
around 10 degrees above normal. Wyatt


.AVIATION...Conditions are improving across the area with an exiting
short-wave trough and high pressure building in.  Stratus has lifted
for KSUN, KBYI, and KPIH. Lingering stratus still remains for KIDA
and KDIJ bringing IFR conditions. Expect VFR conditions by late
morning to early afternoon for KIDA and KDIJ. The next trough moves
through the high pressure ridge bringing deteriorating conditions
likely bringing MVFR/IFR conditions by Tuesday evening, particularly
for KSUN and KDIJ. Wyatt



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