Area Forecast Discussion
Issued by NWS Sioux Falls, SD

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FXUS63 KFSD 240903

Area Forecast Discussion
National Weather Service Sioux Falls SD
403 AM CDT Wed May 24 2017

.SHORT TERM...(Today and Tonight)
Issued at 403 AM CDT Wed May 24 2017

Relatively quiet weather day today as surface high pressure moves
across the region.  While starting off fairly cool, expect
temperatures to rebound into the 60s with 850 hpa temps hanging in
the 5-7 C range throughout the day.  Could see some diurnal cumulus
develop today.

Clearing skies tonight should allow for good radiative conditions,
however, the increasing gradient and subsequent increasing southerly
winds will keep temperatures warmer across central SD.

.LONG TERM...(Thursday through Tuesday)
Issued at 403 AM CDT Wed May 24 2017

Thursday will see a return to much milder temperatures as upper
ridging shifts eastward through the Plains and shortwave attempts to
top the ridge. A cold front will move in central SD Thursday morning
but gets hung up near the James River during the daytime. With
breezy south southwest winds ahead of the front and west to
northwest winds behind the front, good mixing will allow high
temperatures to reach the low to mid 70s. Moisture looks quite poor
in the low and mid levels, however could see some isolated elevated
showers pop up ahead of the front in east central SD and southwest

Broad trough over south central Canada will turn upper level flow to
the west or southwest heading into the weekend, bringing more
unsettled weather to the northern Plains. Dry weather should prevail
on Friday with mostly sunny skies and decent mixing allowing
temperatures to improve a few degrees from Thursday. Clouds will
likely be on the increase late afternoon into Friday night with the
arrival of the first in a series of several waves impacting the
region. Scattered showers with a few isolated thunderstorms will
spread eastward overnight. Timing becomes trickier heading into
Saturday and Sunday, but it is reasonable for shower and
thunderstorm chances are warranted each period.

Upper trough slides eastward into the upper Midwest and western
Great Lakes Sunday and Monday. Another wave drops southeast through
the area on Monday, which will bring additional wet weather to
southwest Minnesota and adjacent areas. Cool northwest flow sets up
Tuesday night and Wednesday, but conditions look largely dry.


.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
Issued at 1026 PM CDT Tue May 23 2017

There will be the possibility of MVFR stratus developing in areas
from near the Interstate 29 corridor and eastward after 10Z. If
low clouds develop, they will scatter out by mid morning on
Wednesday. Light northwesterly winds overnight will transition to
northeasterly on Wednesday, then southeasterly by Wednesday
afternoon and evening.




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