524
FXUS64 KJAN 312328
AFDJAN

Area Forecast Discussion
National Weather Service Jackson MS
628 PM CDT Mon Aug 31 2026

...New AVIATION...

.KEY MESSAGES...

- Dangerous heat stress persists across the forecast area this
  week. Gradually worsening mid-week.

- Rain chances remain best south of the Interstate 20 corridor
  through mid-week, but expands northward by late week.

&&

.DISCUSSION...
Issued at 107 PM CDT Mon Aug 31 2026

Tonight through Labor Day Weekend...Strong high pressure aloft will
remain in place across the region through the forecast period. This,
as high pressure at the surface likewise remains wedged into the
forecast area from the east.  Despite "Potential Tropical Cyclone
Five" currently centered off the south central Louisiana gulf coast,
this system is not forecast to affect the weather across our area as
it continues to move west northwest towards the Southwest
Louisiana/Southeast Texas coast over the next 36 hours.

Therefore for us through this forecast period, expect a continuation
of increasingly humid conditions and hot temperatures. Moisture will
subtly build across the region through the end of the week. Highs
each afternoon will warm into the middle and upper 90s. This, as dew
points mix each day in the low and middle 70s, will yield afternoon
heat index values above the century mark in most locations.  Across
portions of the area during the week, indices will hover between 105-
110 degrees.  This will result in a "Heat Advisory" being needed and
likely adjusted across the forecast area each day as dangerous heat
stress conditions are expected to impact portions of, if not all of,
the CWA through the week.

Other than an isolated shower or storm being observed in the south
in the vicinity of the Highway 84 corridor today through Wednesday,
much of the CWA will remain dry.  As better moisture works north
into the CWA Thursday into the weekend, better rain chances will
likewise spread northward into the CWA.  This could bring some
temporary relief from both the heat and dry conditions across the
region, especially Friday into Labor Day Weekend. /19/

&&

.AVIATION...
(00Z TAFS)
Issued at 618 PM CDT Mon Aug 31 2026

Isolated -shra early this evening will dissipate with sunset and
cause little if any impact. Early morning fog will be something to
monitor mainly in the PIB/HBG area, but IFR/MVFR impacts would be
brief if they occur. Otherwise, VFR conditions are expected to
prevail through the forecast. /EC/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       74  96  74  97 /   0   0   0  10
Meridian      74  97  74  98 /   0   0   0  10
Vicksburg     74  96  74  95 /   0   0   0  10
Hattiesburg   73  95  74  96 /  20  10  10  50
Natchez       74  96  74  96 /  10  10   0  10
Greenville    75  98  76  98 /   0   0   0   0
Greenwood     74  97  75  98 /   0   0   0   0

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory until 8 PM CDT this evening for MSZ018-019-025-
     034>036-040>043-047-048-053-054-059.

     Heat Advisory from noon to 8 PM CDT Tuesday for MSZ018-019-
     025>027-034>036-040>043-047>049-053-054-059-060.

LA...Heat Advisory until 8 PM CDT this evening for LAZ007>009-015-016-
     023-025.

     Heat Advisory from noon to 8 PM CDT Tuesday for LAZ007>009-015-
     016-023>026.

AR...Heat Advisory until 8 PM CDT this evening for ARZ074-075.

     Heat Advisory from noon to 8 PM CDT Tuesday for ARZ074-075.

&&

$$

19/EC