Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 200425

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1025 PM MDT Sat May 19 2018

.DISCUSSION...(This Evening Through Saturday)
Issued at 120 PM MDT Sat May 19 2018

Upper low is positioned over western NEB early this afternoon with
widespread rain extending northward into our far southern zones.
Center of surface high is over far northwest ND, with breezy
north/northeast winds and chilly temps across our cwfa.

Upper low will track slowly east-northeast across NEB tonight,
with light rain gradually ending in our southern areas overnight.
Overnight lows will be in the 30s to lower 40s, with some 20s in
the Black Hills. With clear skies and light winds over northwest
SD, some frost will be possible closer to the ND border.

Upper ridge begins building in for Sunday, resulting in sunny
skies and highs mainly in the 60s. Temps will warm into the 70s on
Monday with southerly winds on the increase. Could see a late day
storm in our western zones on Monday as upper ridge axis begins
to shift east.

Southwest flow aloft will then persist for much of the week,
leading to nearly daily chances for thunderstorms. Temps will also
be quite warm, especially on the SD plains, with thermal ridge
nearby. Upper trof works out of the Northern Rockies into the
Northern Plains late in the week into the weekend and may bring a
very slight cool down by next weekend.


.AVIATION...(For the 06Z TAFS Through 06Z Sunday Night)
Issued At 1024 PM MDT Sat May 19 2018

VFR conds through the period. Gusty SE winds can be expected over
NE WY Sunday.




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