Area Forecast Discussion
Issued by NWS Pocatello, ID

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FXUS65 KPIH 241950

Area Forecast Discussion
National Weather Service Pocatello ID
150 PM MDT Tue Apr 24 2018

.SHORT TERM...Tonight through Friday. A ridge of high pressure
building over the region will provide dry and warmer conditions
through Thursday. A low pressure system currently positioned well
off the NRN California coast will advance into the Oregon coastal
waters Friday with the leading edge of attending moisture and
precipitation working into at least the CNTRL mountains sometime
Friday afternoon. The warmest day this week looks to be Friday with
temps running well above normal ahead of the incoming low. Huston

.LONG TERM...Friday night through Tuesday. Expect pattern change in
the long term with a Pacific system beginning to affect southeast
Idaho. European model is a day slower bringing in colder
temperatures but for now cooled temperatures Saturday but still well
above normal then to normal Sunday and well below normal Monday and
Tuesday. Have a chance of showers and thunderstorms daily with snow
levels dropping to around 7 thousand feet by Sunday with some passes
possibly seeing some accumulation but that far out very low
confidence. GK

.AVIATION...Will have VFR conditions with mainly clear skies through
Wednesday. 10 to 20 knot east winds at BYI should diminish after
sunset. GK

.HYDROLOGY...Warming temperatures through the week will help to
enhance snowmelt at mid and upper levels. A chance of showers
heading into the weekend will add to runoff while cooler
temperatures help to relieve some pressure. For now, it looks as if
the Portneuf, Blackfoot, Big Lost, Henry`s Fork and Snake River will
all see high flows at some point during the next week. Huston

Flood Advisory for the Blackfoot River above the Blackfoot Reservoir
through noon Wednesday.

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