Alert archive / Mississippi / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 310, NWS Jackson, MS

August 20, 20264 counties in Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Aug 20, 2026, 8:15 PM CDT for 4 counties in Mississippi. It was in force for 60 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 20, 2026, 8:15 PM CDT (01:15 UTC)
Expired
Aug 20, 2026, 9:15 PM CDT
In force
60 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 42 km from the middle of the area, began a volume at 01:15 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 was reported inside it

TimeReportWhereRemark
Aug 20, 8:20 PM CDTTSTM WND DMG1 N Mendenhall, MSTree and line down.
Aug 20, 8:30 PM CDTTSTM WND DMG4 Ssw Mize, MSA few trees down along cr 20.
Aug 20, 8:39 PM CDTTSTM WND DMGShady Grove, MSA couple trees down on the W side of the county.
Aug 20, 8:47 PM CDTTSTM WND DMG3 E Zion Hill, MSCouple trees down.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 20, 5:08 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.3 hours before the alert went out and 52 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-pSkew-T log-p diagram, Jackson, MS at 00:00Z on 2026-08-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1618 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 00:00Z on 2026-08-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1618 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
2146 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

584 
WUUS54 KJAN 210115
SVRJAN
MSC121-123-127-129-210215-
/O.NEW.KJAN.SV.W.0310.260821T0115Z-260821T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
815 PM CDT Thu Aug 20 2026

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Southeastern Rankin County in central Mississippi...
  Simpson County in central Mississippi...
  Northwestern Smith County in central Mississippi...
  Southern Scott County in central Mississippi...

* Until 915 PM CDT.

* At 815 PM CDT, a severe thunderstorm was located over Taylorsville,
  or 11 miles southwest of Bay Springs, moving northwest at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Mize around 820 PM CDT.
  Martinville around 900 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3208 8936 3205 8959 3179 8953 3177 9003
      3225 8993 3247 8946
TIME...MOT...LOC 0115Z 130DEG 17KT 3187 8943 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SAS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 7:04 PM CDTSpecial Weather StatementJANAttala, Leake56 min
Aug 20, 7:07 PM CDTSevere Thunderstorm WarningJANAttala, Carroll, Choctaw, Holmes, Leake, Montgomery and 1 more68 min
Aug 20, 7:08 PM CDTSevere Thunderstorm WarningJANFranklin, Jefferson Davis, Lamar, Lawrence, Lincoln, Marion67 min
Aug 20, 7:11 PM CDTSpecial Weather StatementJANClarke64 min
Aug 20, 7:26 PM CDTSevere Thunderstorm WarningJANRankin, Simpson52 min
Aug 20, 7:32 PM CDTSevere Thunderstorm WarningJANClarke, Covington, Jasper, Jones, Smith58 min
Aug 20, 7:36 PM CDTSevere Thunderstorm WarningJANCarroll, Choctaw, Grenada, Montgomery, Webster54 min
Aug 20, 7:44 PM CDTSevere Thunderstorm WarningJANCopiah, Lincoln61 min
Aug 20, 7:48 PM CDTSevere Thunderstorm WarningJANClarke, Jasper, Lauderdale, Newton, Scott, Smith57 min
Aug 20, 8:05 PM CDTSevere Thunderstorm WarningJANAttala, Carroll, Choctaw, Holmes, Leake, Montgomery and 2 more55 min
Aug 20, 8:22 PM CDTFlash Flood WarningJANChoctaw, Montgomery, Webster2 hr
Aug 20, 8:23 PM CDTSevere Thunderstorm WarningJANCarroll, Choctaw, Montgomery, Webster52 min
Aug 20, 8:26 PM CDTSevere Thunderstorm WarningJANCovington, Jasper, Jones, Smith64 min
Aug 20, 8:36 PM CDTSevere Thunderstorm WarningJANJasper, Newton, Scott, Smith54 min
Aug 20, 8:38 PM CDTSpecial Weather StatementJANMarion67 min
Aug 20, 8:46 PM CDTSevere Thunderstorm WarningJANKemper, Lauderdale, Leake, Neshoba, Newton, Scott and 1 more59 min
Aug 20, 8:47 PM CDTSpecial Weather StatementJANLawrence, Lincoln58 min
Aug 20, 8:49 PM CDTSevere Thunderstorm WarningJANAttala, Carroll, Choctaw, Holmes, Leake, Madison and 4 more56 min
Aug 20, 9:00 PM CDTSpecial Weather StatementJANMadison60 min
Aug 20, 9:08 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Lawrence, Rankin, Scott, Simpson and 1 more67 min
Aug 20, 9:20 PM CDTSevere Thunderstorm WarningJANLeake, Madison, Rankin, Scott55 min
Aug 20, 9:36 PM CDTSpecial Weather StatementJANAttala, Choctaw, Holmes, Winston54 min
Aug 20, 9:38 PM CDTSevere Thunderstorm WarningJANKemper, Lauderdale, Leake, Neshoba, Newton, Scott82 min
Aug 20, 9:42 PM CDTSevere Thunderstorm WarningJANCarroll, Holmes, Madison, Yazoo63 min
Aug 20, 10:12 PM CDTSevere Thunderstorm WarningJANHinds, Leake, Madison, Rankin, Scott, Smith78 min
Aug 20, 10:38 PM CDTSevere Thunderstorm WarningJANHinds, Madison, Yazoo82 min
Aug 20, 11:08 PM CDTSpecial Weather StatementJANNewton, Rankin, Scott67 min
Aug 20, 11:09 PM CDTSpecial Weather StatementJANBolivar, Washington66 min
Aug 20, 11:25 PM CDTSpecial Weather StatementJANMadison, Rankin65 min
Aug 21, 12:27 AM CDTSpecial Weather StatementJANHumphreys, Issaquena, Sharkey, Washington63 min
Aug 21, 2:06 AM CDTSpecial Weather StatementJANWebster69 min
Aug 21, 3:08 AM CDTSevere Thunderstorm WarningJANClay, Lowndes, Oktibbeha67 min
Aug 21, 4:08 AM CDTSpecial Weather StatementJANLowndes37 min
Aug 21, 4:24 AM CDTSevere Thunderstorm WarningJANKemper36 min
Aug 21, 12:58 PM CDTHeat AdvisoryJANAdams, Bolivar, Claiborne, Copiah, Franklin, Hinds and 17 more31 hr
Aug 21, 1:49 PM CDTSpecial Weather StatementJANJefferson Davis26 min
Aug 21, 2:00 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis60 min
Aug 21, 2:32 PM CDTSevere Thunderstorm WarningJANAdams58 min
Aug 21, 2:38 PM CDTSevere Thunderstorm WarningJANWarren52 min
Aug 21, 2:38 PM CDTSevere Thunderstorm WarningJANClaiborne, Jefferson52 min
Aug 21, 2:46 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Lamar, Marion59 min
Aug 21, 2:49 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Simpson, Smith56 min
Aug 21, 2:58 PM CDTSevere Thunderstorm WarningJANHinds62 min
Aug 21, 3:02 PM CDTSevere Thunderstorm WarningJANLawrence, Lincoln, Marion58 min
Aug 21, 3:07 PM CDTSevere Thunderstorm WarningJANCovington, Forrest, Jones53 min
Aug 21, 3:16 PM CDTSevere Thunderstorm WarningJANClaiborne, Copiah, Hinds, Warren59 min
Aug 21, 3:24 PM CDTSevere Thunderstorm WarningJANAdams51 min
Aug 21, 3:29 PM CDTSevere Thunderstorm WarningJANCovington, Jones61 min
Aug 21, 3:31 PM CDTSevere Thunderstorm WarningJANWarren44 min
Aug 21, 3:34 PM CDTSpecial Weather StatementJANSimpson56 min
Aug 21, 3:36 PM CDTSevere Thunderstorm WarningJANJasper, Smith54 min
Aug 21, 3:39 PM CDTSevere Thunderstorm WarningJANCopiah, Hinds, Rankin, Simpson66 min
Aug 21, 3:44 PM CDTSevere Thunderstorm WarningJANForrest, Lamar, Marion72 min
Aug 21, 3:51 PM CDTSevere Thunderstorm WarningJANJefferson Davis, Lawrence, Lincoln, Simpson54 min
Aug 21, 3:59 PM CDTSevere Thunderstorm Warning Considerable damage threatJANLawrence, Marion61 min
Aug 21, 4:04 PM CDTSevere Thunderstorm WarningJANAdams, Claiborne, Jefferson56 min
Aug 21, 4:10 PM CDTSevere Thunderstorm WarningJANClaiborne, Copiah, Jefferson, Warren50 min
Aug 21, 4:12 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Simpson, Smith63 min
Aug 21, 4:14 PM CDTSevere Thunderstorm WarningJANAdams, Copiah, Franklin, Jefferson, Lincoln61 min
Aug 21, 4:26 PM CDTSpecial Weather StatementJANNewton64 min
Aug 21, 4:26 PM CDTSpecial Weather StatementJANKemper64 min
Aug 21, 4:33 PM CDTSevere Thunderstorm WarningJANRankin, Scott, Smith42 min
Aug 21, 4:35 PM CDTSevere Thunderstorm WarningJANCopiah, Jefferson Davis, Lawrence, Lincoln, Marion40 min
Aug 21, 4:43 PM CDTSevere Thunderstorm WarningJANSmith29 min
Aug 21, 4:57 PM CDTSevere Thunderstorm WarningJANForrest48 min
Aug 21, 5:06 PM CDTFlash Flood WarningJANSimpson73 min
Aug 21, 5:13 PM CDTSevere Thunderstorm Warning Considerable damage threatJANAdams, Franklin, Jefferson, Lawrence, Lincoln, Marion46 min
Aug 21, 5:33 PM CDTSpecial Weather StatementJANJasper42 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2026Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.