Area Forecast Discussion
Issued by NWS Paducah, KY

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543
FXUS63 KPAH 220912
AFDPAH

Area Forecast Discussion
National Weather Service Paducah KY
312 AM CST Sun Jan 22 2017

.SHORT TERM...(Today through Tuesday night)
Issued at 246 AM CST Sun Jan 22 2017

It is becoming a bit more apparent now that the upper level low
that will push east from the southern Plains today will stay a
bit farther south than was expected yesterday at this time. Hence,
will be lowering rain chances over the northern half of the
forecast area. Also, a farther south track means less chances for
thunder in our region, but will leave just a slight chc mention
mainly over wrn KY closest to the sfc low. Will also be adjusting
rainfall amounts down accordingly...esp north.

Gusty northwest winds will kick in behind the surface low tonight
and precip chances will diminish from west to east. Will likely
see some wind gusts over 30 MPH as the sfc low deepens and moves
toward the Carolinas. High pressure (not of arctic or Canadian
origin) will then build east into the region for the remainder of
the short term, with dry conditions and temps remaining at or
above normal. May even see mid/upper 50s many locations by Tuesday
afternoon.

.LONG TERM...(Wednesday through Saturday)
Issued at 246 AM CST Sun Jan 22 2017

The long-term period continues to look dry and colder. The 500 mb
pattern will be very different from the past several days. A
positively-tilted 500 mb trough axis will extend from the Great
Lakes region west-southwest to the central Plains. A succession of
weak cold fronts will swing southeast across the Lower Ohio Valley.
The air mass will be too dry for organized precip events, although
some flurries or sprinkles are quite possible. High temps will be
around 40 Thursday through Saturday. Overnight lows will fall into
the mid/upper 20s for Friday and Saturday mornings.

As far as the daily specifics, the strongest cold front will move
east across our region on Wednesday. There is still no change in
model depictions of dry conditions with this front. The pre-frontal
wind flow will veer west-southwest in the morning, limiting the
moisture and convergence near the front. Wednesday will be the last
relatively mild day of the current pattern, with highs in the 50s.

As mentioned above, the mean trough axis will be located from the
Great Lakes to the central Plains Thursday through Saturday. A
series of small-scale shortwaves will rotate across the Great Lakes
region within the large-scale trough. The models keep most of the
precipitation and cloudiness with these shortwaves northeast of the
Lower Ohio Valley. The cloudiest areas of our region will likely be
southwest Indiana, northwest KY, and southeast IL, where highs
should be in the upper 30s each day. Areas of southeast MO which
receive the most sun will reach the lower 40s each day. The air mass
will be well-mixed, promoting some gustiness each afternoon.

&&

.AVIATION...
Issued at 1144 PM CST Sat Jan 21 2017

VFR conditions at all sites should prevail through approximately
the first six hours of the period, then quickly deteriorate to
IFR/LIFR with SHRA/TSRA as a system passes by to the south of the
TAF sites. Southerly winds AOB 10 knots early will swing around
to the northeast for most of the period, then around to the north
and becoming gusty with gusts up to 20-22 knots in the last six
hours of the period.


&&

.PAH WATCHES/WARNINGS/ADVISORIES...
IL...None.
MO...None.
IN...None.
KY...None.
&&

$$

SHORT TERM...GM
LONG TERM...MY
AVIATION...JP



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