Area Forecast Discussion
Issued by NWS Aberdeen, SD

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FXUS63 KABR 260535 AAC

Area Forecast Discussion...UPDATED
National Weather Service Aberdeen SD
1235 AM CDT Fri May 26 2017

Issued at 1232 AM CDT Fri May 26 2017

See below for an aviation forecast discussion for the 06Z TAFs.

UPDATE Issued at 1121 PM CDT Thu May 25 2017

No major changes expected the rest of the night.


.SHORT TERM...(This Evening through Friday Afternoon)
Issued at 329 PM CDT Thu May 25 2017

Upper level trough, bringing mid level clouds and scattered light
showers/sprinkles east in the region this afternoon, will move east
into the evening. This will leave mostly clear skies for the night.
At the surface, a trough will also push through tonight bringing
winds around to the west. On Friday, surface high pressure out west
along with a strong surface low pressure area in southern Canada
will bring steady/breezy west to northwest winds to the region.
Expect winds to be from 15 to 25 mph and maybe a little higher.
Otherwise, with low rh and subsidence expect mostly sunny skies
through the day with highs generally from 70 to 75 degrees.

.LONG TERM...(Friday Evening through Thursday)
Issued at 326 PM CDT Thu May 25 2017

Expect lows in the 40s and 50s, and highs in the 60s and 70s. A few
80 degree readings may even sneak in at the end of the forecast
period for Thursday. Much of this time will be dominated by the
500mb low currently set up across southern Saskatchewan. By Friday
night, it will move over Manitoba. The southern extent of the
low/trough will swing across SD mainly Saturday night. As a result,
northwesterly flow will return for Sunday through at least Thursday
as the 500mb low slowly exits across Ontario.

Will start off at the sfc with a weak ridge of high pressure
overhead, behind the exiting trough. Southern areas may experience
some rain showers Saturday morning, before transitioning to far
eastern SD/western MN Saturday afternoon, assisted by a sfc weak
trough swinging around the exiting/deepening low.

Dry weather returns Saturday night into Sunday morning, before more
instability showers/thunderstorms return Sunday afternoon. At this
point it looks like shower activity will only be over far eastern
SD/western MN Memorial Day afternoon.


.AVIATION...(For the 06Z TAFS through 06Z Friday Night)
Issued at 1232 AM CDT Fri May 26 2017

Vfr conditions are expected through Friday at all terminals.




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