Area Forecast Discussion
Issued by NWS Sioux Falls, SD

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FXUS63 KFSD 201138

Area Forecast Discussion
National Weather Service Sioux Falls SD
638 AM CDT Fri Apr 20 2018

.SHORT TERM...(Today and Tonight)
Issued at 330 AM CDT Fri Apr 20 2018

Scattered high cirrus will continue to stream over the tri-state
area this morning. The upper level ridge that was firmly over the
Plains Thursday will move east today, while a large cut-off low
pressure moves into the southern Plains states. This will keep a
weak flow pattern through the weekend. Light surface winds can be
expected today with temperatures running about 10 degrees below
seasonal normals. Clouds increase into the evening being aided by
weak lift in the vicinity of the cut-off low.

.LONG TERM...(Saturday through Thursday)
Issued at 330 AM CDT Fri Apr 20 2018

Overnight into Saturday, sprinkles and light rain showers are
possible, but will not accumulate to much, given abundant dry air in
the near surface layers. More common will be cloudy skies, with
temperatures about 5 degrees warmer than Friday. On Sunday, another
ridge will build over the region, leading to clearing skies and
warmer temperatures near seasonal averages, which is around 60. Dry
conditions with mostly clear skies are forecast for Monday, rising
to about 5 degrees above normal.

The best chance for rain this week will be Tuesday, as a
shortwave breaks off from the northern jet stream. It`s a bit far
out for specifics on rain totals, but 0.25 to 0.50 inch amounts
look most likely at this time. With the rain will come cloudy
skies, so temperatures will be cooler Tuesday. Cold air advection
behind this system keep Wednesday cool as well, with a slow
warming and dry conditions for the later part of next week.


.AVIATION...(For the 12Z TAFS through 12Z Saturday morning)
Issued at 636 AM CDT Fri Apr 20 2018

Light south and east winds will prevail over the next 24 hours.
Gusts 15 to 20 kts are possible at KSUX and south thereof. High
clouds will increase through the daytime hours, slowly lowering
into mid-level cloud decks by the overnight hours. Light rain
showers are possible overnight into Saturday morning, but dry air
near the surface will minimize rain accumulations.




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