Area Forecast Discussion
Issued by NWS Des Moines, IA

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FXUS63 KDMX 270459

Area Forecast Discussion
National Weather Service Des Moines IA
1159 PM CDT Fri Aug 26 2016

.SHORT TERM.../Tonight/
Issued at 353 PM CDT Fri Aug 26 2016

Surface low situated across the western high plains with a warm
front/inverted trough feature extending northeastward into
northern MO. Some peaks of sun have burst through at times today
that has allowed for some surface heating. A nominal amount of
SBCAPE has built in across the far south central with effective
shear on the order of 30-40kts. Shortwave trough ejecting
northeastward through the CWA helping to fire some storms in
vicinity of the developing surface low across NE KS. This activity
is expected to expand north and east near that surface boundary
and into southern Iowa this evening. As the surface low lifts
northeastward through the CWA showers and isolated storms expected
to spread through the eastern CWA by late evening into the
overnight hours. Some lighter showers possible across the
north/west as an area of theta-e advection lifts northwest
through the CWA.

Some chance for a strong to severe storm in the far south if can
get development far enough north, given the weak instability and
strong shear. Hail and winds would be the main severe threats.

.LONG TERM.../Saturday through Friday/
Issued at 353 PM CDT Fri Aug 26 2016

Shortwave to push east of the area into Saturday thus allowing
much of the precipitation to lift east of the area in the morning
hours. Main upper level trough to push east region which could
allow for a few isolated storms still in the east/south through
the day. Otherwise a weak boundary remains in place across the
south and could see additional convection in that area into Sunday
and Monday. Broad upper level ridging to build across the central
US into next week. A few ridge riding shortwave impulses to move
through during the week, and as a result have left in a smattering
of pops through the week. This will also allow for some heat to
build back in with the ridge building more into the end of the
week. Thus the storm track should begin to push north with
temperatures pushing back above the seasonal averages for this
time of year.


.AVIATION.../For the 06Z TAFS through 06Z Saturday night/
Issued at 1154 PM CDT Fri Aug 26 2016

Widespread showers with a few isolated thunderstorms will move
out of central Iowa by 07Z with a few lingering light showers for
the rest of the night. MVFR to IFR cigs will be common tonight
through mid morning, eventually lifting and scattering out by
early afternoon. Areas of fog are also possible in western Iowa
through mid-morning. Winds will be light overnight and switch to
the SSW around 5 kts during the day.




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