910
FXUS63 KUNR 072358
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
458 PM MST Fri Feb 7 2025

.KEY MESSAGES...

-Snow ending tonight

-Dry this weekend with arctic air returning next week

-Light snow accums are possible Monday, especially across the
 western half

&&

.DISCUSSION...(This Evening Through Friday)
Issued at 103 PM MST Fri Feb 7 2025

Mean zonal flow will persist through the weekend, with a slow
warming trend through Sunday. Compact but strong impulse now
moving through the area supporting snow across NW SD. This system
will continue to support rounds of enhanced FGEN there into the
evening before exiting. Expect another 1-3 inches of snow there,
highest near the ND border. Have trimmed the southern end of the
adv areas as snow has concentrated further north. Cold front will
settle south tonight with arctic air advecting into the NW third.
Cool conds will continue Sat with highs in the teens and low 20s.
WAA ahead of the arctic trough will allow for warmer temps Sunday,
with highs in the 20/30s. Mean northern CONUS troughing will
ensue Monday as a large portion of arctic air shifts southeast.
Arctic front will shift south into the region Monday with temps
likely falling through the day. Light snow and flurries can be
expected with the front, although moisture will be highly limited,
an inch or so of snow will be possible across northeast WY and
far western SD. Expect temps to fall below zero most places
overnight Monday through Wed, with the coldest air across NW SD
Tues morning when temps are expected to fall below -20F. Arctic
air will remain in place through mid week, after which a deeper
trough will eject out of the western CONUS and support some WAA
with chances for snow by Friday. Right now, there are some low
probs for accumulating snow with the late week system on Friday,
all of which will hinge on the track of this system.

&&

.AVIATION...(For the 00Z TAFS Through 00Z Saturday Evening)
Issued At 456 PM MST Fri Feb 7 2025

MVFR/IFR conditions are expected tonight, especially through the
evening, as bands of snow continue across northwest SD/the Black
Hills area/northeast WY. These bands will move eastward into
central SD. VFR conditions will return Saturday morning.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Winter Weather Advisory until midnight MST tonight for SDZ001-
     002-014-078.
WY...None.
&&

$$

DISCUSSION/KEY MESSAGES...JC
AVIATION...13