Area Forecast Discussion
Issued by NWS North Platte, NE

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FXUS63 KLBF 211954

Area Forecast Discussion
National Weather Service North Platte NE
254 PM CDT Wed Mar 21 2018

.SHORT TERM...(This evening through Thursday)
Issued at 139 PM CDT Wed Mar 21 2018

Tonight and tomorrow.  A ridge of high pressure to the west and
light southeasterly lower tropospheric wind will allow for some fog
development overnight for northern Nebraska and the central
Sandhills.  At this point the boundary layer seems to have less than
ideal moisture for dense fog, so will highlight patchy wording in
the forecast  Overnight lows are progged to be near seasonal norms,
with most locations bottoming out in the lower 30s, though a few
upper 20s will be possible across our north and northwest.

The upper level ridge of high pressure will build east across the
Plains on Thursday and increase low level temperatures.  The latest
guidance indicates highs well into the 60s for the Sandhills and
points south, in fact lower 70s are likely across our far southwest.
Northern Nebraska will see highs solidly in the 50s.

.LONG TERM...(Thursday night through Wednesday)
Issued at 139 PM CDT Wed Mar 21 2018

Ridging aloft will move across the state overnight on Thursday
into Friday as a trough digs across the Rockies. The long wave
trough will progress toward the area later Friday into Friday
night. This will induce surface cyclogenesis across eastern
Colorado, which will help pull some gulf moisture northward into
the region. Surface dew points into the 50`s are expected late
Friday afternoon across central and southern Nebraska, leading to
some limited but enough instability for some showers and

The trough exits the area Saturday followed by cooler
temperatures. By Sunday, the next long wave trough moves onto the
west coast and into the Great Basin by Monday and then closing off
and drifting south over the Four Corners area where it will likely
linger into mid week. Flow aloft becomes southwesterly Sunday
through Tuesday morning ahead of the trough with an unsettled
pattern persisting through the end of the period with occasional
showers. Precipitation type will be primarily rain with some snow
possibly mixing in across the north and west on Tuesday and
Tuesday night.


.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
Issued at 139 PM CDT Wed Mar 21 2018

VFR generally anticipated across all TAF sites through the
forecast period. Though, some latest guidance indicates some fog
or low stratus potential. At this point, the feeling is that any
development will be spotty in nature, so will not include any
mention in the forecast. The most likely locations to see any
potential impacts from fog would be northern Nebraska, including
KVTN. Will continue to monitor. Otherwise winds are expected to be
light and variable for most locations.




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