Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 232010

Area Forecast Discussion
National Weather Service Pocatello ID
210 PM MDT Mon Apr 23 2018

.SHORT TERM...Tonight through Thursday afternoon. Upper trough
moving north to south over this area through the evening hours, while
 the main low pressure disturbance moves further to the east.
Scattered showers extend from Sun Valley to Palisades/Wayan.
Potential for lightning is very marginal this afternoon, only a
couple of strikes noted in Wyoming area. Expect the showers will
diminish before midnight. North surface winds have been slowly
dominating the Snake Plain with colder air. Lows tonight in the mid
20s to mid 30s. The northerly surface winds will persist on Tuesday,
while a high pressure ridge develops overhead leading to
temperatures rebounding into the 60s and 70s by Thursday.

.LONG TERM...Thursday night through Monday.
An upper level low begins to affect southeast Idaho by Friday and
the european and GFS models differ a bit in their scenarios.  GFS is
colder and wetter.  For now introduced showers and thunderstorms in
the central mountains Friday then spread east Friday night with a
chance or slight chance of showers and thunderstorms through Monday.
 Will have very warm temperatures Friday with the GFS beginning a
cool down Saturday with the European delaying the cool down until
Sunday.  In any case temperatures after the very warm beginning
Friday should be back down to near seasonal normals by Sunday and


A band of showers should drop south and affect most TAF sites with
some lower ceilings late this afternoon and early evening.  They
should dissipate by sunset with clearing skies and VFR conditions.
Winds will turn north to northeast overnight at all locations in the
10 to 15 knot range at PIH, IDA and BYI.




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