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Area forecast discussion 
National Weather Service Sioux Falls South Dakota
359 PM CDT Friday Aug 28 2015

Short term...(this evening through saturday)
issued at 357 PM CDT Friday Aug 28 2015

System shifting south and east of the area leaving behind a fairly
humid and cool air mass. After the diurnally driven cumulus
dissipates this evening...will be a bit later in northwest
Iowa...clear skies...decreasing winds and a very wet ground in some
locations should lead towards areas of fog. Will not issue a dense
fog advisory but suspect that there will be a decent chance at
seeing one in the morning. Temperatures will fall into the middle to
upper 50s by Saturday morning.

After shaking off some morning clouds and fog suspect that Saturday
will end up as a very nice day. Not much wind and partly cloudy skies
with temperatures from the upper 70s to middle 80s. Some slightly
warmer readings towards central South Dakota where Chamberlain could hit 90.

Long term...(saturday night through friday)
issued at 357 PM CDT Friday Aug 28 2015

Fog potential appears to be high once again Saturday night across
the area with light winds and surface moisture continuing to linger.
Added mention of fog and began to increase cloud cover...but will
likely have to continue to nudge sky up with future forecast

Appears it will be a struggle to mix out the moisture and warm the
surface across at least the eastern half of the forecast area on
Sunday. Have lowered temperatures in the east...but if stratus is as
persistent as model sounding show...may have to continue to lower
highs on Sunday.

Thereafter...appears to be a warm and relatively quiet week as upper
level ridge builds from the Desert Southwest into the northern
plains. By middle to latitude portions of the week...a large upper low
across the Pacific northwest tries to translate east...with a few
leading shortwaves embedded in the southwest flow aloft. Timing is
really ill basically removed probability of precipitation until Friday when
timing of a front is somewhat consistent in the models.


Aviation...(for the 12z tafs through 12z Saturday morning)
issued at 621 am CDT Friday Aug 28 2015

While the bulk of the shower and thunderstorm activity has exited
the area to the east...a few scattered showers will persist
into the afternoon but will be light. A wide swath of MVFR and IFR
stratus will persist for much of the day...gradually diminishing
from west to east in the afternoon and evening. Stratus may linger
across northwest Iowa and SW Minnesota into the overnight hours.
With plenty of low level moisture and winds becoming light
overnight...fog will be possible...especially along the i20
corridor and east. Added fog mention after 06z in kfsd and
ksux...but khon may remain in the clear.


Fsd watches/warnings/advisories...
South Dakota...none.


Short term...08
long term...

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