311
FXUS64 KJAN 282334
AFDJAN

Area Forecast Discussion
National Weather Service Jackson MS
634 PM CDT Tue Jul 28 2026

...New AVIATION...

.KEY MESSAGES...

- Dangerous heat stress will persist into Wednesday.

- Increasing rain chances will begin to limit heat stress
  potential later in the week, especially across North Mississippi
  and Arkansas.

&&

.DISCUSSION...
Issued at 221 PM CDT Tue Jul 28 2026

Tuesday night through next Monday:

Another day of hot/humid conditions as we remain on the edge of the
high pressure sitting out near the Desert Southwest. A frontal
boundary will also begin to slide down, providing a slight relief
from humidity in northeast counties, however temps will remain in
the mid/upper 90s to near 100 degrees with areawide heat indices
above 105 F, with some areas reaching indices in the 110-115F range.

A heat advisory and extreme heat warning will be in effect again
Wednesday given there isn`t much change in the current scenario.
With daytime heating and an approaching boundary, showers/storms
will be possible Wednesday afternoon, and this could bring an
earlier end to the heat over ne counties, but it will still be
plenty hot before that happens, and so will keep this area under the
heat advisory for now. One thing worth mentioning for Wednesday -
nothing is outlooked for our CWA at this time, however, a Marginal
(1 out of 5) risk for severe weather is outlooked near Mid AL, and
this may expand into our area due to decent instability in place.
The boundary is expected to make it farther south into our area and
stall Thursday, but there is uncertainty in how far south the front
makes it.

As the high pressure retreats and keeps northwest flow over the
area, another frontal boundary will push into the area from the late
Friday into Saturday. This will keep rain chances through the
weekend and into next week as this front stalls over the area as
well. /SW/

&&

.AVIATION...
(00Z TAFS)
Issued at 634 PM CDT Tue Jul 28 2026

Isolated SHRA and TS across south MS may result in brief visby
reductions through early this evening. Then additional isolated to
scattered SHRA and TS will be possible during the daytime
Wednesday, with highest chances through the end of the TAF period
across north MS and AR. Otherwise, VFR conditions will prevail
with light wind. /DL/


&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       77  97  76  93 /   0  20  40  60
Meridian      78  97  75  93 /   0  30  40  60
Vicksburg     77  97  77  93 /   0  10  30  60
Hattiesburg   79  99  77  93 /   0  10  50  70
Natchez       76  98  76  94 /   0  10  30  60
Greenville    78  96  75  93 /   0  40  40  30
Greenwood     77  96  74  94 /   0  50  40  20

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory until 9 PM CDT this evening for MSZ028>033-037>039-
     044>046-050>052-056>058-060>066-072>074.

     Heat Advisory from 10 AM to 9 PM CDT Wednesday for MSZ028>033-
     037>039-044>046-050>052-056>058-060>066-072>074.

     Extreme Heat Warning until 9 PM CDT this evening for MSZ018-019-
     025>027-034>036-040>043-047>049-053>055-059.

     Extreme Heat Warning from 10 AM to 9 PM CDT Wednesday for MSZ018-
     019-025>027-034>036-040>043-047>049-053>055-059.

LA...Heat Advisory until 9 PM CDT this evening for LAZ007>009-015-016-
     023>026.

     Heat Advisory from 10 AM to 9 PM CDT Wednesday for LAZ007>009-
     015-016-023>026.

AR...Heat Advisory until 9 PM CDT this evening for ARZ074-075.

     Heat Advisory from 10 AM to 9 PM CDT Wednesday for ARZ074-075.

&&

$$

SW/DL