Area Forecast Discussion
Issued by NWS Sioux Falls, SD

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390
FXUS63 KFSD 131132
AFDFSD

Area Forecast Discussion
National Weather Service Sioux Falls SD
532 AM CST Sat Jan 13 2018

.SHORT TERM...(Today and Tonight)
Issued at 311 AM CST Sat Jan 13 2018

Clouds slow to clear early this morning in a few spots, which has
kept temperatures above zero. To the north of the clouds
temperatures have fallen to 5 below to 10 below zero at 3 am. With
some wind across southwest MN and northwest IA wind chills were
running 20 below to 25 below zero. So, will maintain the wind chill
advisory through mid morning. Another cold day today without too
much wind. Clouds will gradually increase this afternoon as another
weak piece of energy moves into the area. This system will be
fighting some mid level dry air like yesterdays system so any snow
chances will come tonight and should move through south central SD
down the Missouri River.

With the clouds and increasing southerly flow through the night lows
will not be as cold as this morning. Expect lows from zero to 5
below in southwest MN to around 10 above in south central SD.

.LONG TERM...(Sunday through Friday)
Issued at 311 AM CST Sat Jan 13 2018

A stronger system will drop south through MN and the eastern
Dakotas on Sunday. Soundings suggest that saturation will be
likely so as the strongest forcing moves through expect some
patchy light snow. Increased chances some Sunday afternoon and
evening, but for now amounts should remain on the light side, an
inch or less with the better chance along and east of a Brookings
to Ida Grove line. Temperatures will be mild, at least relatively
so, with highs from the mid 20s in southwest MN to the mid 30s in
south central SD.

As this system drops south Sunday night much colder air will build
in behind. North winds of 15 to 30 mph are expected Sunday night
into Monday with falling temperatures. Will definitely need a wind
chill advisory for most locations late Sunday night through Tuesday
morning and more than likely a wind chill warning across southwest
MN and nearby locations.

Upper level ridging will move across the area Wednesday and Thursday
with west and southwest flow aloft into the weekend. This will bring
temperatures back to normal Wednesday and likely above normal
Thursday through Saturday. At this time rain and snow does not look
likely.

&&

.AVIATION...(For the 12Z TAFS through 12Z Sunday morning)
Issued at 526 AM CST Sat Jan 13 2018

Clear skies will slowly give way to increasing cloud cover from
west to east this evening into Sunday morning. With this mid-level
cloud cover will come chances for light snow, but accumulations at
area TAF sites currently look to be minimal. Winds also shift to
southerly during this afternoon ahead of this weak weather
disturbance.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...Wind Chill Advisory until 10 AM CST this morning for MNZ071-072-
     080-081-089-090-097-098.

IA...Wind Chill Advisory until 10 AM CST this morning for IAZ002-003-
     013-014-021-022-032.

NE...None.
&&

$$

SHORT TERM...08
LONG TERM...08
AVIATION...VandenBoogart



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