Area Forecast Discussion
Issued by NWS Topeka, KS

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000
FXUS63 KTOP 300819
AFDTOP

AREA FORECAST DISCUSSION
National Weather Service Topeka KS
319 AM CDT FRI SEP 30 2016

.SHORT TERM...(Today and tonight)
Issued at 319 AM CDT Fri Sep 30 2016

Main features undergo minor changes today and tonight and bring some
forecast difficulties by late tonight. Upper low over the Ohio
Valley looks to lift a bit north with the low level ridge over the
Missouri Valley weakening somewhat. This should allow for slightly
more cirrus to reach eastern Kansas with time with the airmass
modifying a bit for slightly warmer high temps today. The ridge
weakens enough for winds off the surface to go more easterly this
evening, bringing the potential for the low cloud over eastern
portions of Iowa and Missouri early this morning to make their way
into northeastern Kansas late this evening. Models are in good
agreement with these trajectory trends and bring a decrease in
speeds late in the night. Depending on where the stratus ends up and
how far east and persistent the cirrus will be, at least patchy fog
seems possible for mainly northeastern locations after 08Z.

.LONG TERM...(Saturday through Thursday)
Issued at 319 AM CDT Fri Sep 30 2016

Saturday may see some patchy fog in northeast Kansas especially in
the lower elevations and river valleys. Surface ridge will be over
northeast Kansas Saturday morning with light winds expected and
clear skies. Highs on Saturday will mainly be in the lower to mid
70s across the area. Slightly warmer temperatures are expected on
Sunday with the return of southerly flow and rising heights. The
upper low in the Ohio Valley on Saturday will move off to the
northeast through Monday as an upper level trough move across the
western CONUS with a ridge over the Southern and Central Plains.
This will bring temperatures back into the lower 80s for Monday. By
Tuesday the upper trough will move out into the Plains with main
upper low moving northeast into the Northern Plains. Good
moisture return is forecast along with increasing shear and
instability. Best chances focus on Tuesday night into Wednesday for
thunderstorms. A cold front is forecast to move through central and
eastern Kansas on Wednesday as the upper trough moves across the
Plains. The upper trough axis looks to move through on early
Thursday. Expect precipitation to linger in the east Wednesday night
then dry out behind the front by Thursday morning. Cooler
temperatures in the low to mid 70s and lows in the 40s to lower 50s
Friday morning.

&&

.AVIATION...(For the 06Z TAFS through 06Z Saturday)
Issued at 1129 PM CDT Thu Sep 29 2016

Forecast soundings prog any boundary layer moisture to remain very
shallow and the latest RAP soundings fail to saturate the surface.
Because of this will maintain a VFR forecast without adding a
mention of fog, but there may be a slight chance for some shallow
ground fog in the river valley.


&&

.TOP Watches/Warnings/Advisories...
NONE.
&&

$$

SHORT TERM...65
LONG TERM...53
AVIATION...Wolters


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