Area Forecast Discussion
Issued by NWS Sioux Falls, SD

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FXUS63 KFSD 171748

Area Forecast Discussion
National Weather Service Sioux Falls SD
1248 PM CDT Tue Oct 17 2017

.SHORT TERM...(Today and Tonight)
Issued at 314 AM CDT Tue Oct 17 2017

Spectacular fall weather continues across the region today with much
of the same as yesterday as far as above normal temperatures and
sunny skies. This all comes courtesy of surface ridging to our south
and a dry atmosphere through the column. Warmed today`s high
temperatures a couple/few degrees in most locations given
yesterday`s readings and expected push of 925 mb temperatures.
Besides the warmer trend in temperatures, the other main difference
in the sensible weather compared to yesterday will be less wind as
the low level flow starts to turn out of the south.

Another weak shortwave passes through tonight but again expected to
be uneventful other than maybe a few passing clouds. Overnight lows
are expected to be mild, running from the mid 40s to perhaps 50.

.LONG TERM...(Wednesday through Monday)
Issued at 314 AM CDT Tue Oct 17 2017

The warm and dry weather continues through the work week and once
again warmed high temperatures over the populated guidance. The
upper level flow begins to turn out of the south by Thursday as
ridging builds to our east and a trough comes onshore the west
coast. This will do one of a couple of things. First, it will
commence moisture return across the region and set the stage for our
weekend precipitation chances. Second, as this wave approaches, the
gradient tightens and results in gusty conditions for Friday.
Depending on how much we end up mixing, wind are likely still
underdone in the going forecast. As the front punches into the area
on Friday night and Saturday, showers and a few thunderstorms
will increase in coverage. The front will clear to the south
Saturday night resulting in a dry but cooler Sunday.


.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1244 PM CDT Tue Oct 17 2017

VFR conditions expected to prevail through the period. Southwest
flow is expected through the afternoon, turning southerly tonight.
Could see some patchy fog develop early Wednesday morning. Have
added mention of lower visibility at KSUX terminal.




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