Area Forecast Discussion
Issued by NWS Rapid City, SD

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000
FXUS63 KUNR 200435
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1035 PM MDT Wed Apr 19 2017

.SHORT TERM...(This Evening Through Thursday Night)
Issued at 232 PM MDT Wed Apr 19 2017

Closed off storm system is now cross the CWA as evident on
satellite and KUDX radar. Precip has been decreasing through the
early afternoon hours as the system pulls E/NE. KUDX shows the
last band holding together from near Faith to the northern Black
Hills. This system will continue to move out through the
afternoon/early evening hours with drier air in its wake. Skies
will clear from west to east tonight as upper ridging builds into
the northern plains. Lows tonight will drop into the 30s to low
40s. Surface high pressure will move into the region Thursday with
sunny skies and highs in the mid 50s to mid 60s. The next system
will be a trough digging into the Great Basin Thursday night. This
will bring precipitation to the northern to central Rockies
Thursday night...then into Wyoming edging closer to the CWA border
into the extended forecast.

.LONG TERM...(Friday Through Wednesday)
Issued at 232 PM MDT Wed Apr 19 2017

Storm system will continue to dig southeast across the Rockies
and into the central high plains on Friday, with a low developing
across the southern plains through the day. Latest models continue
to show good agreement with this system just barely making it
across the CWA border across northeast WY and far southwest SD.
This precip will clear out Friday night with perhaps some
lingering showers Saturday. Warm conditions will return briefly on
Sunday as upper ridging builds over the region, with highs in the
mid 60s to mid 70s. The next system looks to affect the area
Monday as a fast moving shortwave crosses the area. This will
bring another round of showers...but overall QPF looks to be
relatively low. Unsettled weather is expected to continue into the
middle of next week as a longwave trough digs into the western
CONUS.

&&

.AVIATION...(For the 06Z TAFS Through 06Z Thursday Night)
Issued At 1030 PM MDT Wed Apr 19 2017

MVFR to local IFR/LIFR conditions will gradually improve from
west to east over eastern areas tonight. Some patchy fog is
possible in NE WY Thurs morning. Otherwise, VFR conditions
expected most places the remainder of the period as dry air
advects into the area from the NW.

&&

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

$$

SHORT TERM...13
LONG TERM...13
AVIATION...JC



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