Area Forecast Discussion
Issued by NWS Sioux Falls, SD

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
000
FXUS63 KFSD 051134
AFDFSD

Area Forecast Discussion
National Weather Service Sioux Falls SD
534 AM CST Tue Dec 5 2017

.SHORT TERM...(Today and Tonight)
Issued at 307 AM CST Tue Dec 5 2017

Colder temperatures and occasional light snow chances will be the
main story through the rest of the week.

The low pressure system that brought our abrupt arrival into winter
continues to push into the Great Lakes region. While northwest winds
have decreased some, they remain elevated with gusts to 30 mph.
These breezy to gusty northwest winds will continue through the day
and into Tuesday night. A vort lobe and fractured mid level
frontogensis could bring some additional light snow chances by late
afternoon into the overnight hours. Nailing down the exact placement
and extent of this snowfall will be tricky with the parallel
movement to the banded orientation. Regardless, amounts currently
look light (less than an inch) with the most favored location between
Sioux Falls and Chamberlain.

High temperatures will remain below the freezing mark for most
locations with wind chills in the single digits or colder. Overnight
lows Tuesday night will run in the mid teens to mid 20s with perhaps
some lower teens across SW Minnesota closer to the upper level cold
pool.

.LONG TERM...(Wednesday through Monday)
Issued at 307 AM CST Tue Dec 5 2017

No big changes in the extended forecast with a continuation of
north/northwest flow aloft allowing for reinforcing pieces of cold
air. Highs will remain in the 20s to low 30s thru the rest of the
work week with lows in the teens or perhaps a tad colder Wednesday
night. Lowered temperatures a degree or two in areas that recieved
some of the better snow cover earlier today. Could also see spotty
flurries as the dendritic layer occasional saturates. Some
moderation in temperatures is possible by the weekend with the upper
trough pulling east and a building ridge to the west. Confidence in
these details still remains very low though with GEFS members
running nearly a 30 degree spread in temperatures and the ECMWF
hinting at denting the ridge via a shortwave dropping down in the NW
flow.

&&

.AVIATION...(For the 12Z TAFS through 12Z Wednesday morning)
Issued at 525 AM CST Tue Dec 5 2017

Breezy northwesterly winds this morning will again gust to around
30 mph this afternoon. MVFR conditions could return to the region
by late afternoon into the evening hours along with some light
snow chances. Confidence in timing and location of any snow is too
low to include mention at this time other than at KHON where
confidence is slightly higher.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
IA...None.
NE...None.
&&

$$

SHORT TERM...Kalin
LONG TERM...Kalin
AVIATION...Kalin



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.