Alert archive / Mississippi / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 271, NWS Jackson, MS

August 18, 2026Clarke County, Jasper County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 18, 2026, 5:39 PM CDT for Clarke County, Jasper County, Mississippi. It was in force for 51 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 18, 2026, 5:39 PM CDT (22:39 UTC)
Expired: Aug 18, 2026, 6:30 PM CDT
In force: 51 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clarke County, MS, Jasper County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 105 km from the middle of the area, began a volume at 22:43 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.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.7 hours before the alert went out and 115 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 957 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1364 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 18, 2:00 PM CDT, 3 hours 39 minutes earlier.

Area forecast discussion, Aug 18, 2:00 PM CDT, 3 hours 39 minutes before

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In the hours before

Local storm report, Aug 18, 4:51 PM CDT, 48 minutes before

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Special weather statement, Aug 18, 4:55 PM CDT, 44 minutes before

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Local storm report, Aug 18, 5:08 PM CDT, 31 minutes before

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Special weather statement, Aug 18, 5:10 PM CDT, 29 minutes before

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Special weather statement, Aug 18, 5:20 PM CDT, 19 minutes before

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Local storm report, Aug 18, 5:22 PM CDT, 17 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 17, 7:02 PM CDT	Special Weather Statement	JAN	Clay, Lowndes, Oktibbeha	28 min
Aug 17, 7:21 PM CDT	Severe Thunderstorm Warning	JAN	Lamar, Marion	54 min
Aug 18, 10:29 AM CDT	Heat Advisory	JAN	Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 41 more	6 hr
Aug 18, 3:36 PM CDT	Special Weather Statement	JAN	Forrest	39 min
Aug 18, 3:46 PM CDT	Special Weather Statement	JAN	Covington	44 min
Aug 18, 3:48 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Forrest, Jones	22 min
Aug 18, 3:51 PM CDT	Special Weather Statement	JAN	Covington	39 min
Aug 18, 3:56 PM CDT	Special Weather Statement	JAN	Jones	49 min
Aug 18, 4:08 PM CDT	Special Weather Statement	JAN	Choctaw	52 min
Aug 18, 4:16 PM CDT	Special Weather Statement	JAN	Jefferson Davis	44 min
Aug 18, 4:27 PM CDT	Severe Thunderstorm Warning	JAN	Covington	48 min
Aug 18, 4:50 PM CDT	Special Weather Statement	JAN	Winston	25 min
Aug 18, 4:55 PM CDT	Special Weather Statement	JAN	Simpson	50 min
Aug 18, 5:10 PM CDT	Special Weather Statement	JAN	Noxubee	50 min
Aug 18, 5:20 PM CDT	Special Weather Statement	JAN	Jasper	40 min
Aug 18, 5:48 PM CDT	Special Weather Statement	JAN	Kemper	57 min
Aug 18, 5:59 PM CDT	Special Weather Statement	JAN	Simpson	61 min
Aug 18, 6:23 PM CDT	Special Weather Statement	JAN	Clarke, Jasper	67 min
Aug 18, 6:36 PM CDT	Special Weather Statement	JAN	Lauderdale	54 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.