Area Forecast Discussion
Issued by NWS Des Moines, IA

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
FXUS63 KDMX 262343

Area Forecast Discussion
National Weather Service Des Moines IA
643 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 00Z TAFS through 00Z Saturday evening/
Issued at 643 PM CDT Fri Aug 26 2016

Low pressure will pass through the state overnight with areas of
showers along with some thunderstorms in the southeast. Ceilings
are expected to lower overnight with widespread MVFR to IFR
conditions late tonight into Saturday morning. Visibilities will
also see restrictions from rain and also light fog development.
Conditions are expected to improve on Saturday by midday with
light southwest surface winds and VFR ceilings and visibilities.





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