Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 222330

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
530 PM MDT Sat Apr 22 2017

.SHORT TERM...(This Evening Through Sunday Night)
Issued at 151 PM MDT Sat Apr 22 2017

Upper analysis shows ridging over the north central
and western CONUS. Mid/low clouds have been lingering over
northeastern WY, and cumulus clouds have spread across much of the
CWA this afternoon. Radar is picking up on a few weak echoes north
of the Hills. A low-level trough is crossing the Dakotas. Winds are
variable around 5-10 mph, and temps are rising into the 50s and
lower 60s.

Southwesterly winds will increase tonight across south central SD
between exiting high pressure and an incoming low, keeping lows in
the lower 40s there. Winds across northwestern SD will be light from
the southeast, and with max RH approaching 100%, added some fog
across northwestern SD through early Sunday morning.

As the surface low moves into eastern WY, southwesterly winds
will increase across south central SD, with easterly winds over
northwestern SD. This will result in temperatures ranging from the
lower 60s across northwestern SD to the mid 70s across the
southern and central SD plains. Temps in northeastern WY will be
near 70. The first of several upper waves will begin moving
through the region Sunday night, bringing chances for showers and
isolated thunderstorms.

.LONG TERM...(Monday Through Saturday)
Issued at 151 PM MDT Sat Apr 22 2017

Unsettled weather returns for the upcoming week as several
shortwaves cross the region. Daily chances for rain showers are
expected in most areas. Colder air could bring some overnight/early
morning snow to higher elevations depending on the timing of the
systems. At this point, the best windows for widespread
precipitation look to be Monday night into Tuesday morning, and
again Wednesday night into Thursday. Near average temperatures are
expected for Monday, with below average highs in the 40s and low
50s for the rest of the week.


.AVIATION...(For the 00Z TAFS Through 00Z Sunday Evening)
Issued At 523 PM MDT Sat Apr 22 2017

Fairly quiet weather pattern in the short-term as winds will
decrease this evening and VFR conditions prevail for much of the
area. Stratus and fog is possible across far northwestern South
Dakota by Sunday morning resulting in MVFR/IFR conditions through
early-to-mid morning. While VFR conditions will continue through
Sunday, high clouds will increase from northeastern Wyoming by
Sunday afternoon ahead of the next weather system.




SHORT TERM...Pojorlie
LONG TERM...Pojorlie
AVIATION...Eagan is the U.S. government's official web portal to all federal, state and local government web resources and services.