Area Forecast Discussion
Issued by NWS Kansas City/Pleasant Hill, MO
FXUS63 KEAX 021957
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
257 PM CDT WED SEP 2 2015
Issued at 257 PM CDT WED SEP 2 2015
The upper ridge will shift to the east and amplify somewhat over the
next few days. This will result in continued warmer than normal
temperatures with highs in the lower 90s expected through the start
of the weekend. The strengthening ridge should also inhibit
precipitation chances. However, models show strong moisture
transport into eastern Kansas and northwestern Missouri tonight,
similar to the last night and this morning. But isentropic lift if
weaker. Still the GFS and GEM develop some precipitation overnight.
Forecast soundings show a dry low levels of the atmosphere and think
with the strengthening ridge and weak lift the chances of seeing
precipitation redevelop is small to keep from mentioning in the
forecast at this point.
The pattern begins to shift by the early part of next week. The
upper ridge begins to flatten and a deep trough, currently over the
Pacific Northwest/British Columbia, begins to move east into the the
Intermountain West. This sets up a kind of modified southwesterly
flow regime with potentially multiple shortwave troughs moving
around the base of the main trough and into the center of the CONUS.
As a result, the weather looks unsettled for the first half of next
week with a chance for precipitation in the forecast from Sunday
night/Monday morning through the middle of the week. There are
several periods of time with chance look better. The first is the
Sunday night/monday morning period. As the ridge is being shifted to
the east a weak frontal boundary should slide south into the area.
This low level forcing, combined with weakening heights/thicknesses
should allow for scattered to widespread precipitation to form/move
through the region. That boundary then becomes quasi-stationary and
by the middle part of next week, as the upper flow is somewhat
zonal, becomes activated by a shortwave moving through the area.
This leads to more widespread rainfall Tuesday night into Wednesday.
.AVIATION...(For the 18Z TAFS through 18Z Thursday Afternoon)
Issued at 1234 PM CDT WED SEP 2 2015
With precipitation dissipating over the area, there should be no more
impacts to visibility or ceilings. So VFR conditions are expected
through the forecast. Winds may increase later this afternoon and
diminish some overnight. Winds should be stronger and gustier by
tomorrow afternoon with winds mainly from the south.