577
FXUS64 KJAN 011051 AAA
AFDJAN

Area Forecast Discussion...UPDATED
National Weather Service Jackson MS
551 AM CDT Tue Sep 1 2026

...New AVIATION...

.KEY MESSAGES...

- Dangerous heat stress will persist across the forecast area this
  week.

- Rain chances will expand from the Gulf Coast today to include
  more of our forecast area by Thursday and Friday.

&&

.DISCUSSION...
Issued at 113 AM CDT Tue Sep 1 2026

Tropical Storm Edouard off the central Louisiana Gulf Coast should
continue west-northwest, making landfall over Texas by this evening.
No impacts are expected in our forecast area. An anomalously strong
upper-level ridge over the Mid-South is at nearly max strength for
early September. Easterly flow around its southern perimeter will
bring disturbances and rain chances along the Gulf Coast, with rain
chances mainly shunted to the south of our area to our area through
tomorrow. Thursday, an easterly disturbance lifting into our area
will weaken the influence of the ridge and arrive with a surge of
deeper tropical moisture. Rain chances will spread farther north
into our area then Thursday and Friday. By the weekend into early
next week, the ridge will retrograde and amplify over the High
Plains and along the Rockies. Eventually this should translate to
lower rain chances and strengthening heat from the ridge.

Apart from increasing rain chances later in the week, heat and
humidity will still result in afternoon heat index values climbing
into the 105 to 110 degree range for parts of the area. Today
there`s enough confidence to support a Heat Advisory across most
areas except eastern Mississippi. Additional Heat Advisories may be
needed throughout the week ahead. /NF/

&&

.AVIATION...
(12Z TAFS)
Issued at 550 AM CDT Tue Sep 1 2026

VFR conditions are expected to prevail through the forecast.
Scattered upper level cloud coverage will be found across southern
zones, few through central, and SKC along our northern reaches. A
thin layer of shallow ground fog is a possibility in the early
morning but should not affect flight conditions, rapidly burning
off with sunrise./OAJ/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       97  74  97  73 /   0   0  10  10
Meridian      97  74  98  74 /   0   0  10   0
Vicksburg     96  74  95  74 /   0   0   0   0
Hattiesburg   95  73  96  73 /  10   0  30  10
Natchez       96  74  96  73 /  10   0  10  10
Greenville    98  76  98  76 /   0   0   0   0
Greenwood     98  75  98  75 /   0   0  10   0

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory from 11 AM this morning to 7 PM CDT this evening
     for MSZ018-019-025>027-034>036-040>043-047>049-053>055-
     059>064-072.

LA...Heat Advisory from 11 AM this morning to 7 PM CDT this evening
     for LAZ007>009-015-016-023>026.

AR...Heat Advisory from 11 AM this morning to 7 PM CDT this evening
     for ARZ074-075.

&&

$$

NF/NF/OAJ