Area Forecast Discussion
Issued by NWS Aberdeen, SD

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FXUS63 KABR 151559 CCA

Area Forecast Discussion...CORRECTED
National Weather Service Aberdeen SD
1059 AM CDT Sun Apr 15 2018

Issued at 1055 AM CDT Sun Apr 15 2018

Light snow still wrapping into the far eastern CWA late this
morning and is expected to finally end this afternoon. Dont expect
any additional accumulation and will let the winter weather
advisory expire at 1 pm. Otherwise, expect a slow decrease in
clouds across the east through the day with a quick decrease in
snow cover with the mid April sun. Highs will be mostly in the 30s
with lower 40s across the northwest over the snow free areas.


.SHORT TERM...(Today through Monday)
Issued at 334 AM CDT Sun Apr 15 2018

An upper level low pressure system, currently over southern Iowa, is
still spreading light, accumulating snow into far eastern SD and
western MN. Several hi-res models suggest the wrap around snow will
continue through the early afternoon hours before diminishing. Have
already extended the winter weather advisory until 18Z. Hopefully
this system will exit the area by then.

Along the Missouri Valley, skies are beginning to clear, which
should allow for temperatures to drop into the teens and single
digits. The coldest reading will occur in south central SD where
several inches of fresh snowfall is located.

A surface high pressure will slowly drift across the region today
through Monday bringing below normal temperatures. Besides the pcpn
today, the rest of the short term will be dry.

.LONG TERM...(Tuesday through Saturday)
Issued at 334 AM CDT Sun Apr 15 2018

The period opens with an exiting upper trough as the first of two
lows and upper troughs migrates into the Plains. Models have been
very consistent on timing of the two systems in the extended. The
first, on Tuesday night/Wed will bring a mix of rain and snow.
However, because it will primarily affect the region in the
overnight and early morning hours, chances for snow and/or freezing
rain increase due to expected sfc temperatures. At this time a
widespread snow accumulation of up to 2 inches is possible. The
second system will barrel through Plains on Friday and Saturday.
This system will also bring a mix of rain and snow. Placement is
still a big question with this second low as models have been
wobbling between a more southern position which would keep much of
this cwa in the clear and a more northern route which would place us
in the crosshairs. Daytime highs will be fairly stable in the upper
30s to 40s through next weekend.


.AVIATION...(For the 12Z TAFS through 12Z Monday Morning)
Issued at 612 AM CDT Sun Apr 15 2018

VFR conditions are expected to prevail at all sites except KATY.
Light snow continues to stream over eastern SD this morning with
some MVFR cigs. KATY will break out and become VFR this evening.


SD...Winter Weather Advisory until 1 PM CDT this afternoon for

MN...Winter Weather Advisory until 1 PM CDT this afternoon for MNZ046.



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