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
FXUS65 KPIH 242029

Area Forecast Discussion
National Weather Service Pocatello ID
229 PM MDT Mon Apr 24 2017

.SHORT TERM...Monday night through Thursday. The area of
widespread rain is slowly moving from the Snake Plain this
afternoon into the Eastern Highlands. Radar imagery also shows
some scattered showers across the southwest part of the state
drifting towards Cassia County. There are some breaks in the
clouds and a hint of destabilization, making it difficult to rule
out a slight chance of thunderstorms this afternoon. As for the
forecast trend, there is splitting of the flow pattern off the
coast of Washington state. Models are trying to track the
disturbance near the coast more southwesterly towards NV/UT by
Tuesday morning. This should provide more of a break in rainfall
tonight and Tuesday, until the next surge of moisture closer to
Wednesday morning. That disturbance also looks to bring a good
deal of rainfall with it, perhaps another half inch or so. That
will serve to boost flows on local streams and rivers again.
Latest estimates have the Portneuf River at Pocatello slipping
back into the moderate flooding range by Thursday morning. Issued
a river statement to raise awareness to watch children and pets
around these cold and dangerous waters. RS

.LONG TERM...Thursday night through Monday. Friday still looks
pretty wet as a storm drops south across Idaho before developing
into a closed low to our south. We are still looking at cool enough
temperatures to possibly snow Friday morning across the Snake Plain.
We end up in northwest flow with the storm track along or just east
of the Divide. The will provide with off and on showers for sure
along the Divide and the Wyoming border. Any chance farther south
and west depends on how close to the Divide a particular storm ends
up tracking. We should warm up a bit but not major warming trend is
forecast.  Keyes


.AVIATION...We`ve mostly seem VFR/MVFR weather with multiple rounds
of showers and even a few thunderstorms. Some of the stronger
periods of rain or snow are dropping conditions to IFR. It`s still
possible to redeveloping showers and storms behind the last large
band moving into the eastern highlands. There is some clearing but
is it enough to get things going again. We do have showers and/or
VCTS in the TAFS through sunset. After that, we go to VCSH except at
KIDA and KPIH. The models are persistent in dropping a band of rain
and snow southward near sunrise and through the morning hours. Don`t
be surprised at MVFR with this band. In fact with any activity
tonight or Tuesday, the potential for at least MVFR weather exists.
Winds will also be up a bit through tomorrow (even tonight) for
KBYI, KPIH and at times KIDA.

NOTE:  We continue to advertise AMD NOT SKED for KDIJ due to no data
coming from the observation site there. Other observations and
limited webcams are limiting the ability to produce a good forecast
at the airport there.  We are not sure when that will be resolved.





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