187
FXUS64 KJAN 230938
AFDJAN

Area Forecast Discussion
National Weather Service Jackson MS
438 AM CDT Mon Sep 23 2024

...New DISCUSSION...

.DISCUSSION...
Issued at 437 AM CDT Mon Sep 23 2024

Today through tonight: While much attention is given to the
tropical cyclone threat in the eastern Gulf of Mexico, surface
high pressure and ridging aloft will continue to dictate our
weather during the near term, bringing little in the way of
weather impacts and temperatures several degrees above normal. A
weak cold front will approach northwest portions of the area by
later tonight, and the increased moisture convergence could
support increased rain chances over far northwest portions of the
area by daybreak. /EC/

Tuesday through Saturday: A wetter extended period is expected as
a frontal boundary makes it way towards the area and a potential
tropical system moves into the eastern Gulf of Mexico towards FL.
Expect below-average temps (high in the upper 70s & lower
80s/lows in the 60s) throughout the extended period.

An upper-level trough is expected to move in from the northwest,
pushing a frontal boundary towards the ArkLaMiss region on
Tuesday, and rain chances (15-60%) will gradually increase as the
week progresses. This trough will help form a rex block over the
central CONUS with energy likely forming a slow-moving closed low
over the ArkLaTex/ Ozark region.

Concerning tropical development: Model ensembles have come in
agreement with the development of a tropical system that is
expected to move into the Gulf of Mexico. NHC has a 70%
development chance over the next 48 hrs and a 90% chance over the
next 7 days. A lot of uncertainty remains with track and timing of
the tropical system, however; confidence is higher that the
tropical system is expected to move northward across the eastern
Gulf of Mexico. Interaction between the closed off low and
tropical system may bring an abundance of moisture transport and
some concern for heavy rainfall. As a result, greatest QPF
amounts and perhaps some heavy rainfall will be possible in
eastern and northern MS. This event is several days away and
changes to the forecast are expected; check back for updates as
the days progress. /SW/

&&

.AVIATION...
(06Z TAFS)
Issued at 1245 AM CDT Mon Sep 23 2024

VFR conditions and light S-SW surface wind will prevail through
the forecast period. An exception could be areas of early morning
BR/FG that impact mainly southern sites (HEZ-HBG/PIB corridor).
/EC/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       92  71  91  68 /   0   0  30  50
Meridian      94  70  92  68 /   0   0  10  40
Vicksburg     92  71  89  67 /   0   0  30  40
Hattiesburg   95  71  93  70 /   0   0  10  20
Natchez       92  70  90  68 /   0   0  30  30
Greenville    91  71  86  65 /   0  20  50  30
Greenwood     93  72  89  65 /   0   0  40  40

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...None.
LA...None.
AR...None.

&&

$$

EC/SW/EC