Greenville, Mississippi 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

558
FXUS64 KJAN 282347 AAA
AFDJAN

Area Forecast Discussion...UPDATED
National Weather Service Jackson MS
647 PM CDT Sun Jun 28 2026

...New AVIATION...

.KEY MESSAGES...

- Dangerous heat stress intensifies areawide today, & continues
  through the week.

&&

.DISCUSSION...
Issued at 140 PM CDT Sun Jun 28 2026

This afternoon through next Sunday...

Another round of hot and quiet weather conditions is in the forecast
for this afternoon as the high pressure at both the surface and
aloft continue to  gradually shift northeast and east of the Lower
Mississippi River Valley. Similar to yesterday, sky conditions will
remain mostly sunny across the area with daytime highs peaking into
the mid to upper 90s. The ongoing daytime heating combined with
dewpoints in the low to mid 70s will cause heat indices to exceed
above 105 degrees across much of our CWA. Portions of northeast MS
will remain below the 105 heat index criteria. At this time no
changes have been made to the heat graphic for this afternoon and
"Elevated" risk for dangerous heat will continue to be advertised
for portions of south and central MS and areas west of the MS River.
Likewise, the heat advisory remains in effect for much of our CWA
including portions of southeast AR and all of our northeast LA
parishes from noon today to 9 pm Monday. The evening period will
remain quiet across our forecast area. Sky cover will start of
mostly clear with clouds beginning to increase coverage from the
southwest by daybreak early Monday morning. Overnight lows will dip
into the mid 70s.

Dangerous heat stress will continue to be the primary focus for the
extended forecast period Monday into Tuesday. Afternoon highs for
both of these days will peak into the mid to upper 90s. Currently,
heat indices look to be their highest Monday and Tuesday and will
continue into Sunday as heat indices could reach up to around 110
degrees. The heat advisory has been expanded further east to cover
the rest of our CWA. The advisory has also been extended to 9 pm
Tuesday.  At this time, the "Elevated" areawide heat graphic for
this week will continue to be advertised.

There is a chance that portions of the "Elevated" risk could get
upgraded to a "Significant" risk for dangerous heat where heat
indices could exceed above 110 degrees as we get closer to Tuesday.
A heat warning may eventually needed for a good portion of the area
by Tuesday. If a heat warning is issued for Tuesday, it will likely
start from the I-59 corridor and cover areas south of I-20. As we go
through the mid-week and heat stress continue to worsen, general
thinking is to expand the heat warning further north towards the
Delta.

Rain and storm chances will begin to increase Tuesday evening
through Saturday as a few disturbances caught up in easterly flow
affect the area. This could have an affect on how high heat index
readings could get. A few strong to marginally severe storms cannot
be ruled out for much of our area, especially Tuesday and Wednesday.
The 4th of July holiday weekend will be hot, humid, and have decent
chances for scattered convection and storms. Be sure to keep an eye
on the forecast for future updates so that outdoor activities can be
planned accordingly. We will continue to keep an close eye on heat
trends as we head into the new work week. /CR/

&&

.AVIATION...
(00Z TAFS)
Issued at 644 PM CDT Sun Jun 28 2026

VFR conditions wl prevail through the TAF period. /22/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       75  95  75  95 /   0   0   0  10
Meridian      75  97  76  97 /   0   0   0  10
Vicksburg     76  94  76  95 /   0   0   0   0
Hattiesburg   75  98  76  97 /   0   0   0  30
Natchez       75  95  75  97 /   0   0   0  10
Greenville    77  94  75  96 /   0   0   0   0
Greenwood     76  96  75  99 /   0   0   0   0

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory until 9 PM CDT Tuesday for MSZ018-019-025-034-035-
     040>042-047-048-053>055-059>066-072>074.

     Heat Advisory from 11 AM Monday to 9 PM CDT Tuesday for
     MSZ026>033-036>039-043>046-049>052-056>058.

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

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

&&

$$

/CR/22