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

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
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 KEAX 222053

353 PM CDT Wed Oct 22 2014

.SHORT TERM...(This Evening through Friday Night)
Issued at 353 PM CDT WED OCT 22 2014

Late this afternoon an elongated area of showers and isolated
thunderstorms extends from the Dakotas southward into north central
Kansas and further south scattered into central Texas.  This
activity is associated with an upper trough propagating through the
northern Plains along with a secondary vorticity maximum in the
southern stream moving into western Oklahoma.  Short range models
such as the HRRR and local WRF seemed to be doing a good job with
the timing of the precipitation into the forecast area.  Still
expecting rain to spread into the area first in northwest Missouri
later this evening, then gradually across the rest of the forecast
area after midnight.

Upper features and weak surface boundary gradually exit the area
tomorrow bringing an end to the precipitation from west to east.  A
few of the model time sections try to hold on to some cloud cover
during the day tomorrow especially over northeast Missouri, however
still anticipating seeing improving conditions in the afternoon
particularly over eastern Kansas and western Missouri.

Air mass behind the surface boundary moving through on Thursday not
significantly different than air mass currently over region so if
clouds can clear would still expect temperatures to rebound to above
seasonal values tomorrow.  Significant warming of the lower and
middle layers of the atmosphere is forecast for Thursday night and
Friday. 850hPa temperatures approach +18C by 00Z Saturday in eastern
Kansas and western Missoui and as a result surface temperatures
should warm into the middle and upper 70s on Friday.

.LONG TERM...(Saturday through Wednesday)
Issued at 353 PM CDT WED OCT 22 2014

A very pleasant weekend in store as a broad upper level ridge builds
into the country`s mid-section. This puts the CWA under northwest
flow aloft and surface winds shifting around from more northerly at
the start of the weekend to southeasterly by Sunday. With 850mb
temperatures progged to be in the mid teens, and thermal ridge axis
across the CWA Saturday afternoon, wouldn`t be surprised to see a
few locations reach 80 degrees by mid-afternoon. The upper level
ridge will shift eastward and over the area by Sunday, and allow for
another beautiful fall day with highs reaching the low 80s. However,
these reminiscent summerish days won`t last long given an
approaching trough that will bring another chance for rain and a few
thunderstorms. Southerly winds will help advect higher dewpoints
into the region Sunday and Monday increasing instability across the
region. With 500-1000 J/kg of CAPE forecast, cannot rule out a
rumble or two Monday afternoon ahead of the approaching trough.
Long-range models refuse to come to an agreement on the timing and
southern extent this trough will take. The EC takes a more aggressive
and slower approach by deepening the low as it moves across NM and
the TX panhandle. The GFS is less aggressive and keeps the main
trough across the Northern Plains with flow becoming more zonal by


.AVIATION...(For the 18Z TAFS through 18Z Thursday Afternoon)
Issued at 1231 PM CDT WED OCT 22 2014

Main challenge for the 18Z forecast cycle is timing of precipitation into
the TAF sites. In general...prefer the scenario painted by the most
recent HRRR and local WRF run which hold off precipitation until 06z
or later. Should see MVFR conditions linger well into the early morning
hours tomorrow until conditions improve towards the end of the




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