Alert archive / Mississippi / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 278, NWS Jackson, MS

August 19, 2026Clay County, Webster County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 19, 2026, 4:42 PM CDT for Clay County, Webster County, Mississippi. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 19, 2026, 4:42 PM CDT (21:42 UTC)
Expired: Aug 19, 2026, 5:30 PM CDT
In force: 48 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clay County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 71 km from the middle of the area, began a volume at 21:45 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 19, 2:44 PM CDT, 1 hour 58 minutes earlier. Its key messages:

Dangerous heat stress conditions are expected across at least portions of the forecast area through the end of this week.
Isolated severe storms capable of damaging wind gusts are possible across portions of the area today and tomorrow.

Area forecast discussion, Aug 19, 2:44 PM CDT, 1 hour 58 minutes before

Area Forecast Discussion
National Weather Service Jackson MS
244 PM CDT Wed Aug 19 2026

...New DISCUSSION...

.KEY MESSAGES...

- Dangerous heat stress conditions are expected across at least
  portions of the forecast area through the end of this week.

- Isolated severe storms capable of damaging wind gusts are
  possible across portions of the area today and tomorrow.

&&

.DISCUSSION...
Issued at 244 PM CDT Wed Aug 19 2026

Dangerous heat remains a persistent concern over the next several
days into early next week, but steady moisture content (as seen by
dew points remaining in the low to mid 70s this afternoon) is
increasing the risk for isolated strong to severe thunderstorms
today and tomorrow. Analyzed SBCAPE values are near 5000 J/kg this
afternoon across northeastern parts of Mississippi where moisture is
greatest. Heating and weak convergence in the frontal zone will
support thundestorm development particularly in that zone, with
activity then spreading south and east through the instability axis.
Isolated shower and storm development is possible elsewhere. DCAPE
is 1100+ J/kg across the forecast area, so any substantial
convection will carry the risk for damaging wind gusts from
microbursts. Similar conditions will be in place, and a Marginal
Risk for severe storms is in place for the northeastern 2/3rds of
the forecast area.

Heat remains dangerous. Several sites continue to reach air
temperatures of 100 degrees, with peak heat index values near 110-
115 degrees. Gradual easing is expected as this frontal boundary and
drier air edge southward into the weekend, but afternoon heat index
values are still expected to peak near or above 105 degrees into
early next week especially in the southwestern half of our forecast
area. /NF/

&&

.AVIATION...
(18Z TAFS)
Issued at 1255 PM CDT Wed Aug 19 2026

VFR conditions will prevail throughout the forecast period.
Isolated to scattered TSRA will affect sites this afternoon
briefly lowering conditions. Winds will remain light throughout
the period./KP/

&&

.PRELIMINARY POINT TEMPS/POPS...
Jackson       76  99  75  98 /  20  10  10  30
Meridian      75  99  74  97 /  20  20  20  30
Vicksburg     77  98  76  99 /  10  10  10  30
Hattiesburg   76  99  75  98 /  30  20  20  50
Natchez       76  99  76  99 /  10  10   0  30
Greenville    79 100  76  99 /  10  10  40  10
Greenwood     77  98  74  97 /  10  20  40  20

&&

.JAN WATCHES/WARNINGS/ADVISORIES...
MS...Heat Advisory until 9 PM CDT this evening for MSZ026>033-037>039-
     044>046-050>052-055>058-062>066-072>074.

     Heat Advisory from 11 AM to 8 PM CDT Thursday for MSZ018-019-
     025>066-072>074.

     Extreme Heat Warning until 9 PM CDT this evening for MSZ018-019-
     025-034>036-040>043-047>049-053-054-059>061.

LA...Heat Advisory until 9 PM CDT this evening for LAZ007-015-023.

     Heat Advisory from 11 AM to 8 PM CDT Thursday for LAZ007>009-015-
     016-023>026.

     Extreme Heat Warning until 9 PM CDT this evening for LAZ008-009-
     016-024>026.

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

     Heat Advisory from 11 AM to 8 PM CDT Thursday for ARZ074-075.

     Extreme Heat Warning until 9 PM CDT this evening for ARZ075.

&&

NF/KP

In the hours before

Special weather statement, Aug 19, 3:23 PM CDT, 1 hour 19 minutes before

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Special weather statement, Aug 19, 3:56 PM CDT, 46 minutes before

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Local storm report, Aug 19, 4:21 PM CDT, 21 minutes before

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Local storm report, Aug 19, 4:22 PM CDT, 20 minutes before

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Local storm report, Aug 19, 4:25 PM CDT, 17 minutes before

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Special weather statement, Aug 19, 4:28 PM CDT, 14 minutes before

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The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 7:17 PM CDT	Special Weather Statement	JAN	Neshoba	43 min
Aug 19, 3:12 AM CDT	Extreme Heat Warning	JAN	Adams, Bolivar, Claiborne, Copiah, Franklin, Hinds and 12 more	18 hr
Aug 19, 11:14 AM CDT	Heat Advisory	JAN	Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 41 more	33 hr
Aug 19, 2:34 PM CDT	Special Weather Statement	JAN	Jasper	41 min
Aug 19, 2:37 PM CDT	Special Weather Statement	JAN	Oktibbeha	53 min
Aug 19, 2:41 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Noxubee, Oktibbeha, Winston	49 min
Aug 19, 3:12 PM CDT	Severe Thunderstorm Warning	JAN	Lowndes, Noxubee	48 min
Aug 19, 3:21 PM CDT	Special Weather Statement	JAN	Clarke, Jasper	54 min
Aug 19, 3:23 PM CDT	Special Weather Statement	JAN	Choctaw, Clay, Oktibbeha, Webster, Winston	67 min
Aug 19, 3:40 PM CDT	Severe Thunderstorm Warning	JAN	Clarke, Jasper, Lauderdale, Newton	52 min
Aug 19, 3:48 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Clay, Oktibbeha, Webster	57 min
Aug 19, 3:56 PM CDT	Special Weather Statement	JAN	Lowndes, Noxubee	64 min
Aug 19, 4:04 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lowndes, Noxubee	56 min
Aug 19, 4:28 PM CDT	Special Weather Statement	JAN	Leake, Neshoba, Winston	62 min
Aug 19, 4:31 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Kemper, Leake, Neshoba, Winston	59 min
Aug 19, 4:50 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Leake	55 min
Aug 19, 4:58 PM CDT	Special Weather Statement	JAN	Attala, Holmes	62 min
Aug 19, 5:10 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Carroll, Choctaw, Holmes, Montgomery	65 min
Aug 19, 5:22 PM CDT	Special Weather Statement	JAN	Jones	38 min
Aug 19, 5:28 PM CDT	Severe Thunderstorm Warning	JAN	Leake, Neshoba, Newton, Scott	62 min
Aug 19, 6:08 PM CDT	Special Weather Statement	JAN	Jones, Smith	37 min
Aug 19, 6:12 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Jefferson Davis, Jones	63 min
Aug 19, 6:22 PM CDT	Severe Thunderstorm Warning	JAN	Jasper, Newton, Scott, Simpson, Smith	53 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2026 Every severe thunderstorm warning in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.