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
FXUS65 KPIH 140945

Area Forecast Discussion
National Weather Service Pocatello ID
245 AM MST Sun Jan 14 2018

.SHORT TERM...Today through Wednesday...Mild weather conditions
will continue under the influence of high pressure. Temperatures
and tomorrow will be similar to yesterday. Overnight/early morning
fog/low stratus decks are possible in the valleys/Snake River
Plain through Monday morning. What is different in the forecast is
the progression of the low pressure system Tuesday into Wednesday.
Initially, the system was looking more balanced in the Tuesday
time frame and now it is being focused more into Wednesday. There
are fairly substantial differences in global weather solutions on
Tuesday with the European model tracking the low more northerly
into Montana, bringing the Central Mountains snow on Tuesday and
the remainder of SE Idaho with much less precipitation Wednesday.
The GFS and NAM solutions have a slower progression of the low
which then extends the trough of low further south into Utah.
These are the differences and challenges in the forecast Tuesday
and Wednesday and we have a low confidence in precipitation
amounts at this time as a result. Right now, we are forecasting
light snow in the Snake Plain but there will be a mix of rain/snow
once again. NP/GK

.LONG TERM...Wednesday night through Sunday.
Looks to be a fairly wet period with precipitation returning
Thursday initially to the central mountains then spreading and
affecting all of southeast Idaho into Saturday.  Snow levels begin
Thursday in the 5 to 7 thousand foot level then drop to valley
floors by late Friday.  Still uncertainty with system and timing of
everything but there is the potential by the end of it all areas may
see some snow accumulations.  Generally should be drier by late
Saturday and Sunday.  Temperatures will begin well above normal on
Thursday but should fall to seasonal normals by Saturday.


Fog and stratus has stayed north of IDA so far this morning through
2 am.  DIJ has kept stratus around 3 thousand feet.  Very high
humidity at IDA and PIH so fog and stratus still possible this
morning but for now kept VFR but the threat of low IFR remains.  BYi
and SUN should remain VFR with no threat for the stratus.   Little
change through Monday with upper ridge moving overhead with the fog
and stratus threat continuing.



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