Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 252023
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
223 PM MDT SUN SEP 25 2016

.Discussion...The axis of the high pressure ridge is
progressing over southeast Idaho a little slower than previously
forecast.  For tonight, believe the east-northeast surface pressure
gradient and winds will be lighter and maybe not set up until closer
to morning. Went for less patchy fog in the upper Snake Plain
and added some more areas of fog near the Wyoming border, like Swan
Valley.  The high pressure ridge brings a little more subsidence in
by Tuesday morning and at the same time, some more moisture will
move down plain to the west. That could off set fog potential.
Morning lows Monday forecast slightly warmer, so did not issue
another frost advisory. RS

&&

.AVIATION...VFR conditions are expected for the next 24 hours and
beyond. The potential does exist for patchy fog again tonight
especially in the more sheltered valleys. We did see some fog in the
Teton Valley this morning but nothing that impacted KDIJ. However,
that might the airport with the most concern for fog affecting air
operations IF it does indeed form.  Keyes

&&

.LONG TERM...Wednesday through next Sunday. We will see a return to a
wet and cooler pattern.  Higher certainty is still lacking as they
all have a different flavor on timing any particular wave across
eastern Idaho, and therefore when and how much precipitation will
develop. That said, we did increase the chance for the
Friday/Saturday timeframe as the models still show some moisture
falling SOMETIME during those 2 days. By next weekend, highs fall
back into the 50s/60s for the valleys and 40s in the mountains.
Keyes

&&

.PIH Watches/Warnings/Advisories...None.

&&

$$



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