Area Forecast Discussion
Issued by NWS North Platte, NE

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FXUS63 KLBF 151734
AFDLBF

Area Forecast Discussion
National Weather Service North Platte NE
1134 AM CST Fri Dec 15 2017

.SHORT TERM...(Today and tonight)
Issued at 344 AM CST Fri Dec 15 2017

Upper trough axis well south into southern plains this morning, and
with Hudson Bay low moving east there is ridging across the
western CONUS placing the northern plains in fast northwest flow.
Dense Cirrus topping the ridge and moving southeast across the
Dakotas, should skirt western and north central Nebraska today.
Downslope winds and mostly sunny skies will bring much above
normal temperatures to western Nebraska. Highs today in the 50s.
Some clouds over north central zones tonight with winds decoupling
across western Nebraska will keep temperatures in the upper 20s
north to around 20 south.

.LONG TERM...(Saturday through Thursday)
Issued at 344 AM CST Fri Dec 15 2017

A shortwave trough will move southeast across the Rockies and into
the southern plains Saturday night and Sunday. Moisture and large
scale forcing associated with this system are adequate enough to
bring light snow to portions of western Nebraska. Current thinking
is that up to one inch of snow may accumulate Saturday night in the
Pine Ridge area across northern Sheridan county. Also there is
concern for freezing drizzle across southwest Nebraska late Saturday
night and Sunday morning. Bukfit soundings from Ogallala and North
Platte both support freezing drizzle potential, and have added
patchy freezing drizzle to the forecast in these areas. As far as
temperatures, above normal highs in the mid 40s to lower 50s are
expected Saturday ahead of the system, with cooler more "normal"
mid to upper 30s in the wake of the system Sunday.

Northwest flow aloft will continue the early and middle part of next
week. Very mild temperatures will also continue, with highs in the
upper 40s and 50s Monday through Wednesday. By the end of the week,
the upper pattern becomes highly amplified, allowing arctic air to
spill south into the central portions of the country Thursday. Both
the ECMWF and GFS bring a strong arctic cold front across the area
Thursday. Strong mid level FGEN will develop behind the front for a
brief time Thursday, leading to the possibility of snow.
Accumulations look light at this time, but very strong north winds
would accompany the snow, so this will be monitored closely.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1052 AM CST Fri Dec 15 2017

Latest satellite imagery shows largely sunny skies, except for
high clouds moving over north central NEB. These clouds will move
off with largely clear-mostly clear skies expected through early
tonight. Thereafter mid and high clouds will spread into western
and north central NEB through tomorrow morning. Light breezes out
of the west-southwest will persist today and then lessen tonight.
A cold front will track across the area late tonight-tomorrow
morning. This will prompt winds to become northerly along with a
modest increase in speed.

&&

.LBF WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...Power
LONG TERM...Taylor
AVIATION...ET



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