Area Forecast Discussion
Issued by NWS Kansas City/Pleasant Hill, MO

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FXUS63 KEAX 172325

625 PM CDT Fri Oct 17 2014

Issued at 354 PM CDT FRI OCT 17 2014

The overall theme for this forecast package is a quiet and dry
period with seasonal temperatures. The upper level pattern will be
dominated by a general trough over the eastern U.S. and an upper
trough over the Rockies. The eastern trough will be invigorated by
additional energy dropping into its base resulting in a deep closed
upper low by Tuesday night or Wednesday. The GFS is now in close
agreement with the ECMWF which had been the preferred model.

A deep surface low over southeast Canada will maintain northerly
winds across the Midwest through Saturday before the Plains high
pressure forces its way eastward. Cold air advection will continue
over the CWA on Saturday with below average temperatures. The
western edge of wrap around stratocu will likely affect northeast MO
and could prove challenging on cloud and temperature forecasts.
Warmer weather will spread back into the CWA for Sunday and Monday.
A moderately strong shortwave trough is expected to dive southeast
through the Upper MS Valley and western Great Lakes Sunday night and
Monday. An accompanying cold front will sweep through the region on
Monday but the cold air advection will lag some allowing
temperatures to remain above average.

Some question that the mid week model temperatures may have too much
of a cool bias. But even allowing for a slightly warmer ECMWF
solution only results in temperatures a couple degrees higher than
the forecast. Given the potential for a more easterly component to
the boundary layer winds, which greatly limits warming for us and the
amount of warm air advection mid clouds on Thursday will go with the
model blend for now.


.AVIATION...(For the 00Z TAFS through 00Z Saturday Evening)
Issued at 617 PM CDT FRI OCT 17 2014

Continued VFR conditions will prevail through the forecast period.
Northwesterly winds will transition to northeasterly during the early
afternoon period. MVFR steam fog was added to KSTJ due to significant
temperature difference between KSTJ and the river overnight.




AVIATION...Leighton/Welsh is the U.S. government's official web portal to all federal, state and local government web resources and services.