Area Forecast Discussion
Issued by NWS Springfield, MO

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FXUS63 KSGF 170814

314 AM CDT Wed Sep 17 2014

.SHORT TERM...(Today and Tonight)
Issued at 226 AM CDT WED SEP 17 2014

Cu/accas cloud field and area of showers/thunderstorms starting to
develop between 200-230 am over east central KS into central MO in
response to increased lift/isentropic ascent from approaching
disturbance. Vertical shear, elevated instability, general
moisture advection will continue and expected an increase in
precip coverage in the near term. Best mucape values of 1000-1500
J/kg reside over the western cwfa and will support some marginally
severe hail in isolated stronger updrafts into the early daylight

Convection will weaken late this morning as the low level/850mb flow
veers/weakens. Convection in some form may last into the afternoon.
Expect to see some redevelopment late today and/or tonight as the
same general elevated convection scenario replays itself fairly
close to the same general area it is developing now.

Fog: Some areas of dense fog are noted over southern MO, mostly
due to stratus build down, and expect some areas of dense fog to
occur before widespread showers move in. The focus will likely be
in areas along and south of the higher terrain along and south of
MO Highway 60.

.LONG TERM...(Thursday through Tuesday)
Issued at 226 AM CDT WED SEP 17 2014

Ongoing elevated showers/thunderstorms will likely be occurring to
start the period Thursday. Rising mid level heights with an
approaching ridge should suppress more widespread convection late on
Thursday and Thursday night. Dry and warm weather is expected

Timing is the main concern for rain/tstm chances over the upcoming
weekend. Remnant weakening upper level shortwave from a tropical
system is still expected to move ene into the central/southern
Plains and phase with an approaching mid latitude shortwave by

00Z guidance: ECMWF looks slower versus the GEM and GFS
by about 12 hours. If the ECMWF verifies, the better chances for
precip will hold off until later Saturday night-Sunday-Sunday
night. GEM/GFS point more toward Sat afternoon/Saturday night. GFS
ensemble looks a tad slower than operational GFS, but for now went
with the cr blend, modifying onset time a bit later (Sat

Progressive nature of the weekend shortwave will kick out the
precip fairly quickly (no matter what the timing). Dry weather is
then expected Monday-Tuesday as Canadian high pressure moves into
the Midwest/Corn belt.


.AVIATION...(For the 06Z TAFS through 06Z Wednesday Night)
Issued at 1113 PM CDT TUE SEP 16 2014

High pressure over eastern Missouri and Illinois will continue to
slide eastward as a warm front approaches the area from the
southwest and a weak upper level disturbance approaches from the
northwest. An area of low cloudiness over northern Arkansas and
southern Missouri will continue to bring VFR ceilings and possible
VFR forward visibility to BBG and possibly SGF into tonight while
a ridge of high pressure still dominates the area. A more
extensive area of cloudiness will likely develop late tonight due
to radiational cooling and moisture advection into the area.
Toward dawn shower and some thunderstorm activity will likely
develop across southwestern Missouri. This showery pattern will
likely persist well into tomorrow with some more redevelopment
later in the afternoon possible as a second impulse approaches
from the northwest.




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