Area Forecast Discussion
Issued by NWS Aberdeen, SD

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FXUS63 KABR 200217 AAB

Area Forecast Discussion...UPDATED
National Weather Service Aberdeen SD
917 PM CDT Sat May 19 2018

Issued at 912 PM CDT Sat May 19 2018

Main concern for the overnight hours is temperatures in the areas
where a Frost Advisory is in effect later tonight. High cloud
cover has remained abundant over the area this evening, and may
aid in temperatures not falling off as much as previously
expected. Not confident enough to make any changes to the headline
right now, but will continue to monitor.


.SHORT TERM...(This Evening through Sunday Afternoon)
Issued at 354 PM CDT Sat May 19 2018

Cool and dry Canadian high pressure will build into the region
tonight and Sunday. Thus, the strong northeast winds this
afternoon will diminish into the evening and become light later
tonight. There will continue to be some high cirrus clouds
spreading up from the south tonight. These will have some
influence on low temperatures. With the winds going light along
with dewpoints around 30 to 35 degrees along with some cirrus,
expect temperatures to fall into the mid 30s later tonight across
much of the northern CWA. Thus, issued a frost advisory for this
area for late tonight/early Sunday. Sunday will be warmer than
today will some clouds still spreading up from the south and
affecting the southern CWA with steady east breezes from 5 to 15
mph. Highs will be in the upper 60s to the lower 70s.

.LONG TERM...(Sunday Evening through Saturday)
Issued at 354 PM CDT Sat May 19 2018

High pressure will be centered over the western Great Lakes with a
surface trough undercutting the high just off to our south and east.
This combined with an upper level disturbance moving through the
region with bring a chance for a few showers to portions of our
eastern CWA late Sunday into Monday morning. After that system
departs later Monday, the pattern through midweek looks to be
dominated by a building ridge aloft and surface high pressure to the
east and a broad area of low pressure across the Rockies and
northern high plains. This will help to warm temps and allow
moisture to move back into the region. With instability increasing
Tuesday and beyond, periodic chances for showers and thunderstorms
will return. By the end of the period, the upper ridge is expected
to break down as an upper level low moves through the region. This
will ensure that precipitation chances continue through Friday.


.AVIATION...(For the 00Z TAFS through 00Z Sunday Evening)
Issued at 625 PM CDT Sat May 19 2018

VFR conditions will prevail across the area tonight and through
the day Sunday.


SD...Frost Advisory from 3 AM CDT /2 AM MDT/ to 8 AM CDT /7 AM MDT/
     Sunday for SDZ003>006-009-010-015.



LONG TERM...Vipond
AVIATION...Parkin is the U.S. government's official web portal to all federal, state and local government web resources and services.