356
FXUS64 KJAN 311120 AAA
AFDJAN

Area Forecast Discussion...UPDATED
National Weather Service Jackson MS
620 AM CDT Fri Jul 31 2026

...New AVIATION...

.KEY MESSAGES...

- Heat stress will continue to be a concern over much of the area
  today.

&&

.DISCUSSION...
Issued at 252 AM CDT Fri Jul 31 2026

Today through next Thursday...In the near-term, the concern for
dangerous heat stress remains the primary story.  Highs this
afternoon will again hover in the mid to upper 90s.  This, coupled
with dew points in the mid to upper 70s, will again yield afternoon
heat index values generally in the 105F-110F range.  Therefore, a
"Heat Advisory" will be in effect today from 10 AM - 7 PM.  Better
chances for convection will exist this afternoon, mainly across
areas along and east of the Interstate 55 corridor.

Troughing increases across the region over the weekend.  A frontal
boundary will slip into the forecast area Saturday, aiding in a
better development of mainly afternoon and evening showers and
storms across the CWA.  This, cloud cover associated with said
convection, and slightly drier air filtering into the region in the
front`s wake, will provide some temporary relief from the oppressive
heat that`s gripped the region for sometime.  A storm or two could
become intense enough to produce gusty winds, particularly Saturday.
Frequent lightning and heavy downpours can be expected with all
convection.

Unfortunately, this`ll be short-lived as we move into and through
the new work week.  High pressure aloft centered near the Four
Corners region, will begin increasing its presence across the Lower
Mississippi River Valley during this time.  High temperatures will
again begin climbing back into the mid and upper 90s areawide by mid
and late week.  Moisture levels will also begin creeping back up,
possibly again leading to another bout of dangerous heat stress as
we end the forecast period. /19/

&&

.AVIATION...
(12Z TAFS)
Issued at 616 AM CDT Fri Jul 31 2026

VFR conditions will prevail throughout a majority of the forecast
period at all TAF sites. Some MVFR ceilings will be possible at
sites along and north of I-20 where some low stratus has
developed. This will begin eroding after sunrise this morning.
SHRA/TSRA will be possible again this afternoon and early evening.
Winds will westerly and generally remain under 10kts. /KP/19/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       95  76  93  72 /  50  20  20  20
Meridian      92  74  92  73 /  80  50  30  30
Vicksburg     95  77  94  73 /  20  30  40  20
Hattiesburg   93  75  93  75 /  70  30  20  30
Natchez       96  76  95  73 /  10  10  20  30
Greenville    95  78  95  72 /  30  40  10   0
Greenwood     94  76  93  71 /  50  30  30   0

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory from 10 AM this morning to 7 PM CDT this evening
     for MSZ018-019-025>066-072>074.

LA...Heat Advisory from 10 AM this morning to 7 PM CDT this evening
     for LAZ007>009-015-016-023>026.

AR...Heat Advisory from 10 AM this morning to 7 PM CDT this evening
     for ARZ074-075.

&&

$$

19/KP