Area Forecast Discussion
Issued by NWS Aberdeen, SD

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FXUS63 KABR 241159 AAA

Area Forecast Discussion...UPDATED
National Weather Service Aberdeen SD
659 AM CDT Tue Apr 24 2018

Issued at 659 AM CDT Tue Apr 24 2018

12z aviation discussion updated below.


.SHORT TERM...(Today and Tonight)
Issued at 347 AM CDT Tue Apr 24 2018

An upper level low pressure area over central SD early this morning
will drop slowly south southeast through the evening hours. Numerous
showers were shown early this morning on radar and surface obs. Most
of the cwa has likely/definite pops through the morning hours
trending off through the afternoon/early evening as the system moves
south. The issue will be how far northeast will the rain showers
make it into far northeast SD/west central MN as there will be less
lift along with drier low level air. Suspect there will be locations
across the far east that will not receive any or only trace amounts
where the pops are much less. Also, expect breezy/windy northeast
winds across central SD for a time this morning close to the surface
low pressure area. Otherwise, cloudy skies today will decrease
through the night as surface high pressure settles over the region
from the northwest and winds go light.

.LONG TERM...(Wednesday through Monday)
Issued at 347 AM CDT Tue Apr 24 2018

A few "targets of opportunity" in the extended forecast this
morning. First was to raise high temps on Wednesday above
SuperBlend. Good setup for warming with southwest winds, mild
925/850 mb temps, and a dry atmosphere. Several guidance members are
warmer than SuperBlend, so sided more towards the warmer end of
values. Also raised temps Friday through Monday as models agree
pretty well on a mild pattern setting up, with SuperBlend likely too
cool. Next change to the forecast was to raise wind speeds on
Thursday, more towards CONSMOS values. Fairly potent front moving
through the area between 06Z and 12Z Thursday, with gusty north
winds in its wake. Leaned towards higher end guidance for winds,
which included CONSMOS.

Otherwise, no major changes to the extended, which looks mostly dry
early on. Temps look rather mild overall, with the one brief setback
on Thursday in the post-frontal cooler air mass. The weekend looks
rather warm if models continue to hold onto this pattern. Could be
talking about 80 degrees possibly by the time we get to Sunday and


.AVIATION...(For the 12Z TAFS through 12Z Wednesday Morning)
Issued at 659 AM CDT Tue Apr 24 2018

Showers will affect most all locations this morning into the early
afternoon as an upper level low pressure area drops southeast. There
will also be a brief time period of light snow at MBG early this
morning. MVFR ceilings and vsbys this morning at ABR, PIR, and MBG
will improve into the afternoon as the system moves out. Conditions
will become VFR this afternoon and tonight as breezy northeast winds
fall off. ATY is expected to be mainly VFR through the period.




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