Area Forecast Discussion
Issued by NWS Rapid City, SD

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000
FXUS63 KUNR 231627
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
927 AM MST Tue Jan 23 2018

.DISCUSSION...(Today Through Monday)
Issued at 300 AM MST Tue Jan 23 2018

Current surface analysis shows low pressure over southeast SK,
with a frontal boundary well north and east of the region. Upper
level analysis shows Low pressure over the western Great Lakes
region, with a ridge along the west coast. West- northwest flow is
in place across the Northern Rockies and Northern Plains. A weak
disturbance has brought clouds and a few areas of light
snow/flurries over far northeast WY and western SD. This activity
should dissipate by daybreak with decreasing clouds through the
day. Low clouds and patchy fog still linger over far south central
SD, mainly in the Winner area. Temps are mostly in the 20s with
northwesterly winds.

Relatively quiet weather is expected over the next few days as ridge
along the west coast slowly moves east across the western US and
into the central states by Thursday. Temperatures will be on the
rise through Thursday, with highs in the mid 40s to near 60 on
Thursday. Ridge shifts east of the area later on Thursday, allowing
a cold front and upper level shortwave to move across the area
Thursday night and early Friday. Moisture with this system looks
rather limited, with just some lower chances for snow over
mostly northeast WY right now.

More seasonable temperatures will return for Friday and the weekend
behind the system, but still slightly above average levels. Will
likely see another warmup for early next week as another ridge
builds over the Rockies and into the Plains.

&&

.AVIATION...(For the 18Z TAFS Through 18Z Wednesday)
Issued At 927 AM MST Tue Jan 23 2018

VFR conditions are expected through the period.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...None.
&&

$$

DISCUSSION...26
AVIATION...13



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