Area Forecast Discussion
Issued by NWS Pocatello, ID

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
000
FXUS65 KPIH 250834
AFDPIH

Area Forecast Discussion
National Weather Service Pocatello ID
234 AM MDT Sat Mar 25 2017

.SHORT TERM...Today through Monday...Scattered rain showers
progressing steadily eastward across our portion of the state
early this morning. Through late this afternoon, expect shower
activity to be heaviest east of the interstate corridor and over
cities including Preston and Driggs and a rain/snow mix over Soda
Springs and Island Park. This activity should move out of the
region by the evening. Meanwhile, scattered rain showers cannot be
ruled out entirely across the Snake Plain area today with
isolated snow showers possible in the Central Mountains. Wind
gusts this afternoon across the Snake Plain are expected to reach
25 mph and improve after sunset. Weak high pressure builds in
going into tomorrow and allows for clearing conditions across the
region. By the late evening and overnight hours, the next upper
trough passes through Idaho and will bring chances for rain in the
valleys/snow in the mountains through Monday afternoon. Snow
levels are approximately 5500 to 6000 ft during this period.
Therefore, areas who do not have snow on their floors may receive
a light dusting. NP/Valle

&&

.LONG TERM...Tuesday through Saturday.

Low pressure system exits the region Tuesday. European shows showers
associated with the next system arrive by Wednesday afternoon while
the GFS keeps area dry until Thursday. Both models have next low
pressure system arriving from the northwest on Thursday. Expect a
good chance for showers. Snow levels begin high on Thursday, around
6500 to 7000 feet but fall to around 5000-5500 feet Thursday night.
Could be enough cold air in the wake of this system that we could
see some light snow even down to valley floors for Thursday night
into Friday depending on how the storm actually evolves. Right now,
model show moisture exiting the area on Friday and temperature not
quite cold enough for snow on the valley floors. Dry weather returns
for Saturday. Temps continue to look warm with 60s possible in some
locations Wednesday and Thursday. Coolest days will be behind the
two storm systems, Tuesday and Friday with highs in the upper 40s to
mid 50s.

Valle

&&

.AVIATION...Precipiation associated with a cold front will affect
all TAF locations this morning. Expect much of the precipitation
to exit the TAF locations by afternoon. In the meantime, MVFR
conditions possible. Expect breezy conditions to develop across
the Snake Plain this afternoon.

Valle

&&

.Hydrology...The forecast for the Portneuf River at Pocatello
currently no longer reaches Moderate Flood stage; but is still
close to peaking or holding steady at just under 10 ft through
early next week. A flood warning continues at this location. The
Bear River at Border is currently at minor flood status and a
flood warning has been extended a result. A decreasing trend is
noted at this location into action stage today. The Snake at
Blackfoot is in action stage and forecast to reach to near minor
flooding status early next week. This will need to be closely
monitored. All other flood advisories and watches will continue
across the region through the weekend due to the anticipated
rainfall and snowmelt potentials. NP/Valle

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Flood Watch until 1 PM MDT this afternoon for IDZ017>019-022>025-
031-032.

&&

$$


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.