Area Forecast Discussion
Issued by NWS Pocatello, ID

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000
FXUS65 KPIH 210855
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
255 AM MDT Sat Oct 21 2017

.DISCUSSION...With a cold front well to our east now, focus will
shift to our next precipitation maker later this afternoon and
evening. While it won`t be impossible for light showers to fall
prior to the arrival of the main system, expect the bulk of snow
showers to arrive mid afternoon in the Central Mountains with
additional showers in the Upper Snake Highlands and Eastern
Highlands not long thereafter. Expect snow accumulations across
the Salmon-Challis NF or Sawtooth NF, along highway 75, highway
21, Galena Summit and Banner Summit. In these areas, snow levels
will initially start around 5000 ft and rise to 6500 ft this
evening with further increases overnight. As a result, the bulk of
the snowfall is expected this afternoon and evening with snow
continuing mainly above 8000 ft overnight and into Sunday morning.
Snow accumulations of 2 to 5 inches are forecast below 6500 ft
today with upwards of 10 inches forecast above 8000 ft through
Sunday. Those in Ketchum southward are not expected to see
accumulating snow. For the Upper Snake Highland areas and the
Teton Valley, snowfall of 1 to 4 inches is expected through
tomorrow. Meanwhile, another breezy day is expected across the
Snake Plain today though not quite as windy as Friday. Wind speeds
of 20 to 25 mph are expected. Sunday brings stronger winds in
these areas with winds of 20 to 30 mph, which may prompt another
wind advisory. Temperatures today compared to Sunday will be
noticeably different with mid 40s today and upper 50s/low 60s
tomorrow. Monday through Wednesday high pressure begins to build
into our region and temperatures continue to build with drying
conditions forecast. A fast moving shortwave looks to bring a
chance for precip to eastern Idaho late Wednesday into early
Thursday with subsequent cooler air for your Thursday forecast.
The end of the week brings gradually warming temperatures.
NP/Valle

&&

.AVIATION...Expect brisk conditions once again today. A storm system
will bring a mix of rain and snow to portions of the area starting
this afternoon and lingering into Sunday. Looks like KSUN and KDIJ
stand the best chance of seeing lower ceilings and visibilities
from this system.

Valle

&&

.FIRE WEATHER...A storm system will bring a threat of rain and snow
to the region for Saturday and Sunday. Expect cooler conditions for
Saturday with breezy conditions continuing through the weekend.
Temperatures will be a little warmer on Sunday as the system
gradually departs the area. Warmer and dry air will return to the
region for the upcoming week.

Valle

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$



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