Area Forecast Discussion
Issued by NWS Boise, 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 29 30
FXUS65 KBOI 241701

Area Forecast Discussion
National Weather Service Boise ID
1001 AM MST Fri Feb 24 2017

.DISCUSSION...No updates to current forecast this morning. The
area of low pressure which brought snowfall across the area
yesterday continues to lift further northeast, with just a few
showers lingering over the central mountains. Otherwise, generally
dry conditions today. Remnant moisture may produce a few showers
here and there, but no significant weather is anticipated. The
next shot for anything more widespread will be Sunday morning as
the next Alaskan trough drops south along the Pacific coast.


.AVIATION...MVFR snow showers and mountain obscuration will continue
over portions of the central Idaho mountains, north and east of a
KMYL-KBOI-KTWF line. Elsewhere, VFR conditions expected. Surface
winds: W-NW generally 12 kts or less, except for Mountain Home and
to its south and east where winds of 10-20 kts with gusts up to 30
kts are expected. Winds aloft at 10kft MSL: NW 15-30 kts, turning W
10-20 kts after 21Z.


SHORT TERM...Today through Saturday...Snow shower activity will
dissipate across the Snake Plain and southwest Idaho mountains
this morning as remnants of yesterday`s storm pulls east. Any
additional accumulations in the Western Magic Valley are less than
an inch, with 1-2 inches in the central Idaho mountains. Drier
air to the west clears out cloud cover across southeast Oregon and
far southwest Idaho today, though a cold air mass remains in
place. Though some cloud cover lingers, tonight is cold, with
single digit lows in southeast Oregon and below zero temperatures
in the colder mountain valleys of southwest Idaho. Saturday brings
an increase in clouds and a chance of snow to areas along the NV
border and central Idaho mountains as an upper trough drops
through the Pac NW. Temperatures remain cold through Saturday,
averaging 10-15 degrees below normal.

LONG TERM...Saturday night through Thursday...Model agreement is
above average. An upper level trough from Alaska will deepen as it
moves into the longwave trough over the Intermountain Region on
Sunday. This will bring more snow and continued cold temperatures
through Monday. Snowfall in the valleys is expected to be light. The
mountains will see heavier accumulations, especially over central
Idaho and Baker County Oregon. This will be the last system from the
north, as an upper level ridge approaches the west coast, and the
flow over our area shifts to northwesterly. There will still be a
chance of snow showers Monday night and Tuesday, followed by dry
weather Tuesday night through Thursday. Temperatures will slowly
moderate, but will still average 5 to 10 degrees below normal.





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