611 
FXUS63 KOAX 101152
AFDOAX

Area Forecast Discussion
National Weather Service Omaha/Valley NE
552 AM CST Tue Nov 10 2020

...Updated Aviation Forecast Discussion...

.DISCUSSION...
Issued at 341 AM CST Tue Nov 10 2020

Ice Storm Warning continues for a swath of counties where ice has
accumulated on elevated surfaces. Road temperatures remain above 
freezing and as of this writing, no major road issues have been 
reported with the freezing rain areas. A Winter Weather Advisory 
continues for counties surrounding the Ice Storm Warning for a 
wintry mix with accumulating snow expected across northeast 
Nebraska through the afternoon with roughly 2-4 inches across that
area.

The base of a deep upper trough continues to eject northeast out of 
southeastern Colorado this morning and is forecast to move across 
the forecast area by this afternoon. Ahead of this, widespread 
precipitation continues to spread northeast over the area. Beginning 
around 10pm last evening, elevated surface began accumulating ice 
around David City and Columbus areas. This continued to spread 
northeast, generally along the compact 850mb frontal zone, into 
Colfax County, Dodge County and into parts of Washington County. 
Several reports of ice bringing trees/power lines down in these 
areas. As mentioned earlier, road temperatures remained just above
freezing with no significant impacts to roads as road temperatures
remained just above freezing. Over our northern counties, behind 
the front, light icing has mixed with and changed over to snow 
with snow beginning to stick on the highways per NDOT web cameras.

Precipitation will continue to quickly push northeast of the area
this morning with some lingering showers before the deformation 
zone spreads across much of our northern CWA by late morning to 
bring additional accumulating snowfall into the early afternoon. 
Generally 2-4" of snow is possible across northeast Nebraska 
before tapering off by dark as the upper low moves northeast of 
the region. Surface temperatures are not expected to move far from
where they currently sit with the 32F degree line generally 
residing along I-80 throughout much of the day. Temperatures 
should begin to fall after dark as dry surface high pressure 
builds east. 

Tonight through Monday:

Fairly quiet weather with near-normal temperatures is expected with 
broad troughing over the northern Plains through the remainder of 
the week. The next chance for measurable precipitation looks to be 
late Friday into Saturday in association with an elongated shortwave
trough. Model blends keep much of this precipitation as rain with
a possible snow mix in our northern counties. Otherwise, 
temperatures through the weekend continue to be near-normal.

&&

.AVIATION...(For the 12Z TAFS through 12Z Wednesday morning)
Issued at 540 AM CST Tue Nov 10 2020

Light rain and freezing rain will be possible over the next couple
of hours this morning. Liquid precip will switch to snow at KOFK
by 14Z with snow falling at KLNK and KOMA around 15Z to 18Z. Snow
will come to an end from south to north, with conditions 
improving to MVFR around 20Z. Overall, snowfall accumulations
should remain around 2 to 3 inches at KOFK and less than an inch
at KLNK and KOMA. Additional ice accumulations should be less than
0.1".  

&&

.OAX WATCHES/WARNINGS/ADVISORIES...
NE...Winter Weather Advisory until 3 PM CST this afternoon for NEZ011-
     012-016>018-030-031-052-053-065>067-078-088.

     Ice Storm Warning until 3 PM CST this afternoon for NEZ015-
     032>034-042>045-050-051.

IA...Winter Weather Advisory until 3 PM CST this afternoon for IAZ055-
     056-069.

     Ice Storm Warning until 3 PM CST this afternoon for IAZ043.

&&

$$

DISCUSSION...Kern
AVIATION...KG