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fxus63 koax 081114 
afdoax

Area forecast discussion
National Weather Service Omaha/valley NE
514 am CST sun Dec 8 2019

..updated aviation forecast discussion...

Discussion...
issued at 308 am CST sun Dec 8 2019

Today:
a weakening pressure gradient will lead to lighter winds today and
mild temperatures. High temperatures today should range from the
mid 40s in northern Nebraska to the low 50s in southeastern
Nebraska.

Tonight through wednesday:
a strong cold front descending from the Dakotas will impact the
forecast area after midnight. The primary impacts from this front
will be a sharp decline in temperatures, strong winds, and light
snow in the early morning hours. Limited moisture and lack of mid-
level forcing should keep snowfall totals to under an inch. Strong
northerly winds behind the front could gust to over 30 mph at
times, leading to wind chills below 0f in northern Nebraska and
below 10f for most of the rest of the forecast area.

Northwesterly flow and a deepening trough over the eastern US will
lead to cooler temperatures Tuesday and Wednesday. The coldest
temperatures will occur Tuesday night as a high pressure system
behind a secondary surge of cold air will result in calmer winds
and clearer skies. Temperatures in northeastern Nebraska should
dip below 10f.

Thursday through saturday:
upper level flow will become more zonal Thursday allowing for
temperatures to rebound Thursday and Friday. The GFS and ecwmf
show a chance of precipitation Friday night but differ greatly in
their location.

&&

Aviation...(for the 12z tafs through 12z Monday morning)
issued at 514 am CST sun Dec 8 2019

A strong cold front analyzed from central Minnesota to northern South Dakota as of
5 am will continue south and eventually move through the terminal
locations late tonight into Monday morning. Ahead of the front,
winds will be light and variable or light southeast. Winds will
subsequently switch to northwest at 10-20 kt with the frontal
passage. Mainly high-level clouds (fl200) will linger across the
area today with MVFR stratus developing late tonight behind the
cold front. Some light snow is also possible at the end of the
forecast period at kofk.

&&

Oax watches/warnings/advisories...
NE...none.
Iowa...none.
&&

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