Weather Service Report


646 
FXUS65 KPIH 260950
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
350 AM MDT Wed Apr 26 2017

.SHORT TERM...Today through Friday. Look for a relatively strong
cold front to move through the area today bringing with it a surge
of moisture mostly this afternoon into early evening. Overall, 
expect .10 to .25 inch of valley rain and .25 to .40 inch of 
mountain precipitation with 3 to 6 inches of mountain snow above 
around 6000 feet. Some areas along the Northern Wyoming border may
see higher snow amounts. Expect slushy snow today as low as 
around 5000 feet. Also, as the cold front moves through late this
afternoon into early evening look for isolated thunderstorms as 
well as moderate to strong winds. As cold air moves into the 
region in Northwest flow expect moderate winds on Thursday as well
as upslope snow showers for mainly our Northern areas, 
particularly the Eastern highlands. Look for an embedded wave in 
Northwest flow to bring slightly stronger rain and snow showers 
across the area late Thursday into Friday. Light valley snow is 
possible late Thursday into Friday. High pressure starts to build 
into the area late Friday into Saturday. Expect below normal 
temperatures through the period, particularly near the end of the 
period. Valley temperatures will drop to the mid to upper twenties
with mountain temperatures dropping to mid to upper teens Friday 
and Saturday mornings. Colder temperatures and cold cover will 
retard snow melt through the period. However, rainfall will keep 
streams and rivers running at elevated levels. Wyatt

.LONG TERM...Saturday through Wednesday night. No major differences 
in the models thru the long term. Both models have a retreating 
upper low over CO/NM on Sat resulting in lingering showers mainly 
over the eastern highlands...with northwest flow prevailing on Sun. 
The GFS is wetter on Sun with sctd showers over the mtns and isold 
showers elsewhere...while the ECMWF limits precip to the north. 
Based on precip trends this spring so far...will lean more toward 
the GFS. Both models move a wave thru the Pac NW on Mon...with the 
GFS more amplified and wetter than the ECMWF. This wave moves to the 
east on Tue...but deepens enough to generate mainly mtn showers. By 
Tue night...upper ridging builds up over the west...resulting in 
drier and warmer conditions thru Wed night and beyond. Hedges

&&

.AVIATION...Another surge of Pac moisture will result in widespread 
precip across the area today...mainly this aftn and eve. MVFR cigs 
are expected to be common this aftn/eve. Rain may mix with snow at 
KSUN and KDIJ. Hedges

&&

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

$$

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Western Regional Climate Center, wrcc@dri.edu