Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 140, NWS Jackson, MS

May 4, 20217 counties in Mississippi; Tensas Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at May 4, 2021, 1:57 PM CDT for 7 counties in Mississippi; Tensas Parish, Louisiana. It was in force for 78 min. 7 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
May 4, 2021, 1:57 PM CDT (18:57 UTC)
Expired
May 4, 2021, 3:15 PM CDT
In force
78 min
Issued by
NWS Jackson, MS
Area
Storm-based polygon
Hail
0.88 in
Wind
70.0 mph

Counties Tensas Parish, LA, Adams County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Jefferson County, MS, Warren County, MS

What was reported inside it

TimeReportWhereRemark
May 4, 2:20 PM CDTTSTM WND DMG1 Sse Vidalia, LATREE DOWN ON HWY 131.
May 4, 2:23 PM CDTTSTM WND DMG1 Nne Sibley, MSSEVERAL TREES AND LINES DOWN IN THE SIBLEY AREA.
May 4, 2:23 PM CDTTSTM WND DMG3 Sw Rocky Springs, MSMULTIPLE TREES DOWN AND SOME LINES, SOME ROADS BLOCKED BY TREES.
May 4, 2:25 PM CDTTSTM WND DMG1 N Pine Ridge, MSA FEW TREES DOWN.
May 4, 2:26 PM CDTTSTM WND DMGPort Gibson, MSWIDESPREAD DOWNED TREES AND LINES, MOST OF THE COUNTY IS OUT OF POWER. SEVERAL ROADS BLOCKED BY TREES.
May 4, 2:30 PM CDTTSTM WND DMG3 N Kingston, MSSCATTERED TREES AND LINES DOWN.
May 4, 2:38 PM CDTTSTM WND DMG5 E Pattison, MSSEVERAL TREES DOWN AND LINES, SOME ROADS BLOCKED BY TREES.

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
May 4, 9:18 AM CDTTornado WatchSPC7 hr
May 4, 10:52 AM CDTTornado WatchSPC7 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.0 hours before the alert went out and 149 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 12:00Z on 2021-05-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2428 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 12:00Z on 2021-05-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 170 square meters per square second.19395878Sfc1 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
2428 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
646 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
170 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
2.8
Supercell composite
13.2

Open this sounding in Storm Lab

The text

As transmitted.

081 
WUUS54 KJAN 041857
SVRJAN
LAC107-MSC001-021-029-037-049-063-149-042015-
/O.NEW.KJAN.SV.W.0140.210504T1857Z-210504T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
157 PM CDT Tue May 4 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Central Tensas Parish in northeastern Louisiana...
  Southwestern Warren County in west central Mississippi...
  Claiborne County in southwestern Mississippi...
  Jefferson County in southwestern Mississippi...
  Franklin County in southwestern Mississippi...
  Adams County in southwestern Mississippi...
  Southwestern Hinds County in central Mississippi...
  Northwestern Copiah County in central Mississippi...

* Until 315 PM CDT.

* At 157 PM CDT, severe thunderstorms were located along a line
  extending from near Somerset to 6 miles northwest of Black Hawk,
  moving east at 45 mph.

  HAZARD...70 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Newellton and Somerset around 205 PM CDT.
  Yokena around 225 PM CDT.
  Rocky Springs around 235 PM CDT.
  Reganton around 240 PM CDT.
  Utica around 250 PM CDT.

Other locations impacted by these severe thunderstorms include Roxie
and Meadville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A Tornado Watch remains in effect until 400 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 600 PM CDT
for northeastern Louisiana...and southwestern and west central
Mississippi.

LAT...LON 3123 9164 3124 9165 3128 9151 3143 9155
      3137 9151 3137 9147 3139 9146 3152 9152
      3159 9140 3162 9152 3163 9140 3220 9134
      3225 9113 3220 9115 3221 9057 3135 9086
      3132 9112 3137 9126 3132 9147 3123 9149
TIME...MOT...LOC 1857Z 266DEG 41KT 3217 9133 3121 9172 

HAIL...0.88IN
WIND...70MPH
 
$$

TW
2 follow-up statements
761 
WWUS54 KJAN 041918 RRB
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
218 PM CDT Tue May 4 2021

LAC107-MSC001-021-029-037-049-063-149-042015-
/O.CON.KJAN.SV.W.0140.000000T0000Z-210504T2015Z/
Tensas LA-Warren MS-Claiborne MS-Jefferson MS-Franklin MS-Adams MS-
Hinds MS-Copiah MS-
218 PM CDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR SOUTHEASTERN TENSAS PARISH...SOUTHWESTERN WARREN...CLAIBORNE...
JEFFERSON...FRANKLIN...ADAMS...SOUTHWESTERN HINDS AND NORTHWESTERN
COPIAH COUNTIES...

At 218 PM CDT, severe thunderstorms were located along a line
extending from 7 miles west of Yokena to 7 miles southwest of
Dolorosa, moving east at 45 mph.

HAZARD...70 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe storms will be near...
  Yokena around 230 PM CDT.
  Rocky Springs around 235 PM CDT.
  Reganton around 240 PM CDT.
  Utica around 250 PM CDT.

Other locations impacted by these severe thunderstorms include Roxie
and Meadville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A Tornado Watch remains in effect until 400 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 600 PM CDT
for northeastern Louisiana...and southwestern and west central
Mississippi.

LAT...LON 3124 9165 3129 9151 3143 9155 3137 9151
      3136 9150 3140 9146 3152 9152 3154 9144
      3160 9141 3162 9152 3161 9141 3169 9140
      3176 9126 3176 9136 3213 9101 3220 9106
      3221 9057 3135 9086 3137 9127 3123 9164
TIME...MOT...LOC 1918Z 266DEG 41KT 3219 9106 3123 9146 

HAIL...0.88IN
WIND...70MPH
 
$$

TW
190 
WWUS54 KJAN 041957
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
257 PM CDT Tue May 4 2021

LAC107-MSC001-149-042007-
/O.CAN.KJAN.SV.W.0140.000000T0000Z-210504T2015Z/
Tensas LA-Warren MS-Adams MS-
257 PM CDT Tue May 4 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TENSAS PARISH...
SOUTHWESTERN WARREN AND ADAMS COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 400 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 600 PM CDT
for southwestern Mississippi.

LAT...LON 3136 9115 3151 9116 3168 9102 3208 9081
      3220 9073 3221 9057 3135 9086
TIME...MOT...LOC 1957Z 266DEG 41KT 3222 9057 3126 9097 

$$

MSC021-029-037-049-063-042015-
/O.CON.KJAN.SV.W.0140.000000T0000Z-210504T2015Z/
Claiborne MS-Jefferson MS-Franklin MS-Hinds MS-Copiah MS-
257 PM CDT Tue May 4 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM CDT
FOR SOUTHEASTERN CLAIBORNE...EASTERN JEFFERSON...WESTERN FRANKLIN...
SOUTHWESTERN HINDS AND NORTHWESTERN COPIAH COUNTIES...

At 257 PM CDT, severe thunderstorms were located along a line
extending from 7 miles east of Newman to near Gloster, moving east at
45 mph.

HAZARD...70 mph wind gusts and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

These severe thunderstorms will remain over mainly rural areas of
southeastern Claiborne, eastern Jefferson, western Franklin,
southwestern Hinds and northwestern Copiah Counties, including the
following locations... Roxie and Meadville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A Tornado Watch remains in effect until 400 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 600 PM CDT
for southwestern Mississippi.

LAT...LON 3136 9115 3151 9116 3168 9102 3208 9081
      3220 9073 3221 9057 3135 9086
TIME...MOT...LOC 1957Z 266DEG 41KT 3222 9057 3126 9097 

HAIL...0.88IN
WIND...70MPH
 
$$

TW

The office that day

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

IssuedProductOfficeCountiesLasted
May 4, 3:50 AM CDTFlash Flood WatchJANClarke, Copiah, Covington, Forrest, Franklin, Hinds and 13 more18 hr
May 4, 7:28 AM CDTSpecial Weather StatementJANClay32 min
May 4, 7:58 AM CDTSevere Thunderstorm WarningJANCopiah, Hinds, Rankin, Simpson62 min
May 4, 8:19 AM CDTTornado WarningJANCopiah, Rankin, Simpson56 min
May 4, 9:06 AM CDTTornado WarningJANRankin, Simpson54 min
May 4, 9:29 AM CDTSpecial Weather StatementJANClay46 min
May 4, 9:48 AM CDTSpecial Weather StatementJANGrenada27 min
May 4, 9:49 AM CDTSpecial Weather StatementJANScott26 min
May 4, 9:55 AM CDTSpecial Weather StatementJANChoctaw35 min
May 4, 10:02 AM CDTSevere Thunderstorm WarningJANChoctaw, Oktibbeha43 min
May 4, 10:11 AM CDTSpecial Weather StatementJANLowndes34 min
May 4, 10:15 AM CDTFlash Flood WarningJANClay, Webster2 hr
May 4, 10:59 AM CDTSpecial Weather StatementJANClay31 min
May 4, 11:25 AM CDTSpecial Weather StatementJANLowndes20 min
May 4, 12:01 PM CDTSpecial Weather StatementJANMadison44 min
May 4, 12:07 PM CDTSevere Thunderstorm WarningJANMadison, Rankin38 min
May 4, 12:18 PM CDTSevere Thunderstorm WarningJANBolivar, Washington72 min
May 4, 12:30 PM CDTSevere Thunderstorm WarningJANIssaquena, Washington75 min
May 4, 12:40 PM CDTSevere Thunderstorm WarningJANLeake, Madison50 min
May 4, 12:42 PM CDTSpecial Weather StatementJANCopiah48 min
May 4, 12:43 PM CDTSpecial Weather StatementJANMadison47 min
May 4, 12:46 PM CDTSevere Thunderstorm WarningJANMadison, Yazoo44 min
May 4, 12:47 PM CDTSevere Thunderstorm WarningJANCopiah43 min
May 4, 12:57 PM CDTSevere Thunderstorm WarningJANIssaquena76 min
May 4, 1:10 PM CDTSevere Thunderstorm WarningJANLeake50 min
May 4, 1:16 PM CDTSpecial Weather StatementJANGrenada29 min
May 4, 1:19 PM CDTSevere Thunderstorm WarningJANLeflore, Sunflower59 min
May 4, 1:19 PM CDTSevere Thunderstorm WarningJANRankin, Scott, Smith41 min
May 4, 1:22 PM CDTSevere Thunderstorm WarningJANHolmes, Humphreys, Issaquena, Sharkey, Washington, Yazoo71 min
May 4, 1:28 PM CDTSpecial Weather StatementJANAttala47 min
May 4, 1:31 PM CDTSevere Thunderstorm WarningJANRankin, Simpson44 min
May 4, 1:37 PM CDTSpecial Weather StatementJANCarroll, Montgomery23 min
May 4, 1:37 PM CDTSevere Thunderstorm WarningJANHinds, Issaquena, Warren, Yazoo53 min
May 4, 1:44 PM CDTSevere Thunderstorm WarningJANCarroll, Grenada, Montgomery75 min
May 4, 1:52 PM CDTTornado WarningJANRankin, Scott, Smith23 min
May 4, 2:00 PM CDTSevere Thunderstorm WarningJANLeake, Neshoba45 min
May 4, 2:09 PM CDTSevere Thunderstorm WarningJANAttala, Holmes, Leake, Madison, Rankin, Scott and 1 more66 min
May 4, 2:12 PM CDTSevere Thunderstorm WarningJANCopiah, Hinds, Madison, Rankin, Scott, Simpson and 1 more93 min
May 4, 2:12 PM CDTSevere Thunderstorm WarningJANAttala, Carroll, Choctaw, Holmes, Montgomery63 min
May 4, 2:18 PM CDTSpecial Weather StatementJANClay27 min
May 4, 2:22 PM CDTTornado WarningJANAttala, Holmes, Madison, Yazoo20 min
May 4, 2:29 PM CDTSpecial Weather StatementJANWinston46 min
May 4, 2:29 PM CDTSevere Thunderstorm WarningJANWebster61 min
May 4, 2:30 PM CDTSevere Thunderstorm WarningJANWebster60 min
May 4, 2:33 PM CDTSevere Thunderstorm WarningJANWinston42 min
May 4, 2:35 PM CDTTornado Warning Tornado observedJANHinds, Madison, Rankin25 min
May 4, 2:40 PM CDTSevere Thunderstorm WarningJANCopiah, Franklin, Jefferson Davis, Lawrence, Lincoln, Simpson80 min
May 4, 2:44 PM CDTSevere Thunderstorm WarningJANNewton, Scott, Smith46 min
May 4, 2:53 PM CDTTornado Warning Tornado observedJANRankin, Scott, Smith18 min
May 4, 3:02 PM CDTSevere Thunderstorm WarningJANNoxubee28 min
May 4, 3:03 PM CDTSevere Thunderstorm WarningJANChoctaw, Oktibbeha, Winston57 min
May 4, 3:08 PM CDTSevere Thunderstorm WarningJANLeake, Neshoba52 min
May 4, 3:09 PM CDTSevere Thunderstorm WarningJANJasper, Smith51 min
May 4, 3:09 PM CDTSevere Thunderstorm WarningJANJasper, Newton, Scott, Simpson, Smith81 min
May 4, 3:18 PM CDTSevere Thunderstorm WarningJANKemper, Noxubee42 min
May 4, 3:20 PM CDTTornado Warning Tornado observedJANLeake, Neshoba, Newton, Scott40 min
May 4, 3:32 PM CDTTornado WarningJANClarke, Jasper29 min
May 4, 3:36 PM CDTSevere Thunderstorm WarningJANLauderdale54 min
May 4, 3:38 PM CDTSevere Thunderstorm WarningJANCovington, Jefferson Davis, Jones, Lamar, Lawrence, Lincoln and 1 more82 min
May 4, 3:49 PM CDTSevere Thunderstorm WarningJANLowndes, Noxubee29 min
May 4, 3:50 PM CDTSevere Thunderstorm WarningJANClarke55 min
May 4, 3:51 PM CDTAreal Flood WarningJANWashington6 hr
May 4, 3:58 PM CDTSevere Thunderstorm WarningJANKemper32 min
May 4, 4:26 PM CDTSevere Thunderstorm WarningJANForrest, Jones, Lamar, Marion94 min
May 4, 11:57 AM CDTSevere Thunderstorm WarningJANMorehouse78 min
May 4, 12:37 PM CDTFlash Flood WarningJANMorehouse, West Carroll3 hr
May 4, 1:15 PM CDTSevere Thunderstorm WarningJANCatahoula, Concordia, Franklin, Tensas75 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2021Severe Thunderstorm Warnings in Louisiana, 2021Every severe thunderstorm warning in 2021

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.