Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 171115
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
415 AM MST Fri Feb 17 2017

.SHORT TERM...Today through Sunday night.
There will brief weak high pressure today before the next system
starts impacting the area early this evening.The main impacts
from this storm will be on the South facing slopes of the Southern
Central mountains where a foot to a foot and half of snow is
expected through Sunday above 6500 feet. Lower elevations will
see 2 to 4 inches of snow, possibly more. The Southern Lost River
range and mainly the Northern Upper Snake Highlands will see 8 to
12 inches of snow with locally higher amounts above 6500 feet.
Again, lower elevations will see 2 to 4 inches, possibly more. A
winter storm Warning is effect tonight from 8 pm mdt through
Sunday afternoon for Southern Central mountains, Southern Lost
River Range and the Northern Upper Snake Highlands above 6500
feet. The Eastern and Southern highlands will receive 2 to 6
inches above 6000 to 6500 feet. Valleys below 6000 to 6500 feet
will receive .4 to .6 inches of rain. Expect moderate Southerly
winds across the area with strong Southerly winds for the Southern
Highlands and the Southern Lower Snake River plain late tonight
through Saturday. Look for breezy to moderate Westerly winds by
Sunday for the area. Temperatures will rise considerably
particularly for our Southwest areas. Daytime temperatures will be
in the 40s and approaching 50s today and Saturday and to an
lesser extent on Sunday. Nighttime temperatures tonight and
Saturday night will stay well elevated above freezing, mainly for
our Southwest areas.

With warmer temperatures, rain on snow, and breezy Southerly
winds, low-lying flooding will likely start up again over the
weekend into next week for most areas below 6000 feet.

.LONG TERM...Monday through Friday.
Generally wet conditions will continue through the long term period.
Another Pacific system will bring rain and high elevation snow
Monday through Tuesday.  Snow levels Monday will start out near
valley floors and rise rapidly to around 7000 feet Monday night
before a cold front slides east Tuesday and drops snow levels to
valley floors again Wednesday through the end of the week.   Decent
precipitation amounts can be expected Monday and Tuesday.   Both GFS
and European continue to hint at a closed low and potential heavy
snow event Wednesday through Thursday in the Snake River Plain but
high uncertainty that far out.  For now have widespread snow
Wednesday through Thursday in grids with snow continuing on Friday
as the system exits.  After the recent warm spell it appears we are
headed back to a more winter like pattern from Wednesday into next
weekend with daily high temperatures slipping to below seasonal
normal.
GK

&&

.AVIATION...Expect VFR conditions today ahead of the next Pacific
system to move in tonight through Saturday.  Expect the brunt of the
precipitation to be in SUN and DIJ but all sites may see
precipitation after 00Z this evening with occasional MVFR or even
IFR ceilings.
GK

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Winter Storm Warning from 8 PM this evening to 5 PM MST Sunday
for IDZ018-019-031-032.

&&

$$



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