Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 22, NWS Jackson, MS

March 17, 20215 counties in Mississippi; Madison Parish, Tensas Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Mar 17, 2021, 4:34 PM CDT for 5 counties in Mississippi; Madison Parish, Tensas Parish, Louisiana. It was in force for 56 min. 3 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: Mar 17, 2021, 4:34 PM CDT (21:34 UTC)
Expired: Mar 17, 2021, 5:30 PM CDT
In force: 56 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Jackson/Brandon,MS radar (KDGX), 88 km from the middle of the area, began a volume at 21:39 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

Time	Report	Where	Remark
Mar 17, 4:54 PM CDT	TSTM WND DMG	2 Ese Vicksburg, MS	UTILITY POLE AND LINES DOWNED ON CLAY ST NEAR I-20.
Mar 17, 5:08 PM CDT	TSTM WND DMG	3 N Utica, MS	TREES DOWNED IN UTICA AND ALONG THE NATCHEZ TRACE PARKWAY.
Mar 17, 5:16 PM CDT	TSTM WND DMG	Bolton, MS	TREES DOWNED.

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.

Issued	Product	Office	Lasted
Mar 17, 11:36 AM CDT	Tornado Watch PDS	SPC	7 hr
Mar 17, 12:57 PM CDT	Tornado Watch PDS	SPC	6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.6 hours before the alert went out and 79 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: 687 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 713 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted.

692 
WUUS54 KJAN 172134
SVRJAN
LAC065-107-MSC021-029-049-063-149-172230-
/O.NEW.KJAN.SV.W.0022.210317T2134Z-210317T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Jackson MS
434 PM CDT Wed Mar 17 2021

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Northeastern Tensas Parish in northeastern Louisiana...
  Southeastern Madison Parish in northeastern Louisiana...
  Warren County in west central Mississippi...
  Claiborne County in southwestern Mississippi...
  Central Jefferson County in southwestern Mississippi...
  Western Hinds County in central Mississippi...
  Western Copiah County in central Mississippi...

* Until 530 PM CDT.

* At 434 PM CDT, severe thunderstorms were located along a line
  extending from Tallulah to 7 miles southeast of Somerset to 6 miles
  northeast of Church Hill, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Severe thunderstorms will be near...
  Yokena around 445 PM CDT.
  Vicksburg, Red Lick and Le Tourneau around 450 PM CDT.
  Pattison, Blue Hill and Rocky Springs around 455 PM CDT.
  Peyton, Reganton and Mcbride around 500 PM CDT.
  Newman around 505 PM CDT.
  Utica, Barlow and Allen around 510 PM CDT.
  Youngton around 515 PM CDT.
  Glancy, Dentville and Dry Grove around 520 PM CDT.

Other locations impacted by these severe thunderstorms include Mound,
Learned, Delta and Richmond.

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 700 PM CDT for central and
south central Mississippi. A Tornado Watch also remains in effect
until 700 PM CDT for northeastern Louisiana...and southwestern and
west central Mississippi.

LAT...LON 3243 9131 3246 9102 3245 9096 3242 9096
      3245 9094 3244 9088 3245 9086 3246 9086
      3251 9045 3225 9041 3170 9047 3169 9125
      3211 9119
TIME...MOT...LOC 2134Z 259DEG 44KT 3243 9119 3213 9111 3178 9116 

HAIL...<.75IN
WIND...60MPH
 
$$

TW

2 follow-up statements

979 
WWUS54 KJAN 172152 RRA
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
452 PM CDT Wed Mar 17 2021

LAC065-107-MSC063-172202-
/O.CAN.KJAN.SV.W.0022.000000T0000Z-210317T2230Z/
Tensas LA-Madison LA-Jefferson MS-
452 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN TENSAS...
SOUTHEASTERN MADISON PARISHES IN NORTHEASTERN LOUISIANA AND CENTRAL
JEFFERSON 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 700 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 700 PM CDT
for northeastern Louisiana...and southwestern and west central
Mississippi.

LAT...LON 3178 9084 3183 9084 3187 9108 3214 9100
      3219 9100 3237 9087 3238 9088 3236 9100
      3241 9099 3243 9096 3245 9098 3245 9097
      3243 9095 3245 9094 3244 9088 3246 9085
      3251 9045 3225 9041 3179 9046
TIME...MOT...LOC 2152Z 248DEG 46KT 3255 9099 3228 9085 3191 9093 

$$

MSC021-029-049-149-172230-
/O.CON.KJAN.SV.W.0022.000000T0000Z-210317T2230Z/
Warren MS-Claiborne MS-Hinds MS-Copiah MS-
452 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR CENTRAL WARREN...CLAIBORNE...WESTERN HINDS AND NORTHWESTERN
COPIAH COUNTIES...

At 452 PM CDT, severe thunderstorms were located along a line
extending from near Eagle Bend to near Vicksburg to near Pattison,
moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Bovina and Newman around 500 PM CDT.
  Flowers around 505 PM CDT.
  Edwards, Carpenter and Youngton around 510 PM CDT.
  Utica and Dentville around 515 PM CDT.
  Bolton around 520 PM CDT.
  Dry Grove around 530 PM CDT.

Other locations impacted by these severe thunderstorms include
Learned.

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 700 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 700 PM CDT
for northeastern Louisiana...and southwestern and west central
Mississippi.

LAT...LON 3178 9084 3183 9084 3187 9108 3214 9100
      3219 9100 3237 9087 3238 9088 3236 9100
      3241 9099 3243 9096 3245 9098 3245 9097
      3243 9095 3245 9094 3244 9088 3246 9085
      3251 9045 3225 9041 3179 9046
TIME...MOT...LOC 2152Z 248DEG 46KT 3255 9099 3228 9085 3191 9093 

HAIL...<.75IN
WIND...60MPH
 
$$

TW

672 
WWUS54 KJAN 172208
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
508 PM CDT Wed Mar 17 2021

MSC021-029-172218-
/O.CAN.KJAN.SV.W.0022.000000T0000Z-210317T2230Z/
Claiborne MS-Copiah MS-
508 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR CLAIBORNE AND NORTHWESTERN
COPIAH 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 700 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 700 PM CDT
for southwestern and west central Mississippi.

LAT...LON 3205 9072 3247 9074 3251 9045 3225 9041
      3205 9043
TIME...MOT...LOC 2208Z 252DEG 47KT 3264 9077 3237 9063 3200 9071 

$$

MSC049-149-172230-
/O.CON.KJAN.SV.W.0022.000000T0000Z-210317T2230Z/
Warren MS-Hinds MS-
508 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR EAST CENTRAL WARREN AND WESTERN HINDS COUNTIES...

At 508 PM CDT, severe thunderstorms were located along a line
extending from near Valley Park to near Edwards to near Carpenter,
moving east at 55 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

These severe storms will be near...
  Bolton around 520 PM CDT.
  Dry Grove around 530 PM CDT.

Other locations impacted by these severe thunderstorms include
Learned.

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 700 PM CDT for central
Mississippi. A Tornado Watch also remains in effect until 700 PM CDT
for southwestern and west central Mississippi.

LAT...LON 3205 9072 3247 9074 3251 9045 3225 9041
      3205 9043
TIME...MOT...LOC 2208Z 252DEG 47KT 3264 9077 3237 9063 3200 9071 

HAIL...<.75IN
WIND...60MPH
 
$$

TW

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 16, 7:01 PM CDT	Tornado Warning	JAN	Copiah, Lawrence, Simpson	31 min
Mar 16, 7:02 PM CDT	Severe Thunderstorm Warning	JAN	Attala	36 min
Mar 16, 7:32 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Simpson	58 min
Mar 16, 7:33 PM CDT	Special Weather Statement	JAN	Choctaw	27 min
Mar 16, 8:29 PM CDT	Special Weather Statement	JAN	Simpson	46 min
Mar 16, 8:49 PM CDT	Special Weather Statement	JAN	Kemper, Newton	56 min
Mar 16, 9:50 PM CDT	Special Weather Statement	JAN	Lauderdale	25 min
Mar 17, 6:05 AM CDT	Tornado Warning	JAN	Bolivar	40 min
Mar 17, 6:44 AM CDT	Tornado Warning	JAN	Bolivar	19 min
Mar 17, 11:37 AM CDT	Special Weather Statement	JAN	Jones	38 min
Mar 17, 12:07 PM CDT	Tornado Warning Tornado observed	JAN	Clarke	53 min
Mar 17, 12:22 PM CDT	Tornado Warning	JAN	Clarke, Lauderdale	54 min
Mar 17, 12:50 PM CDT	Tornado Warning	JAN	Copiah, Lawrence, Lincoln	55 min
Mar 17, 1:00 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Lauderdale, Noxubee	45 min
Mar 17, 1:28 PM CDT	Tornado Warning	JAN	Jones	15 min
Mar 17, 1:45 PM CDT	Tornado Warning	JAN	Jones	21 min
Mar 17, 3:33 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Jefferson Davis, Lawrence	42 min
Mar 17, 4:10 PM CDT	Tornado Warning	JAN	Adams, Franklin	50 min
Mar 17, 4:45 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar, Washington	60 min
Mar 17, 4:52 PM CDT	Tornado Warning	JAN	Copiah, Jefferson, Lincoln	37 min
Mar 17, 4:56 PM CDT	Tornado Warning	JAN	Bolivar, Washington	29 min
Mar 17, 5:15 PM CDT	Severe Thunderstorm Warning	JAN	Hinds, Madison, Rankin, Yazoo	64 min
Mar 17, 5:20 PM CDT	Tornado Warning	JAN	Jasper, Smith	55 min
Mar 17, 5:45 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Marion	34 min
Mar 17, 5:55 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Choctaw, Holmes, Leake, Montgomery, Neshoba and 2 more	65 min
Mar 17, 6:05 PM CDT	Severe Thunderstorm Warning	JAN	Leake, Neshoba, Newton, Scott	55 min
Mar 17, 6:12 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Simpson, Smith	48 min
Mar 17, 6:13 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar	47 min
Mar 17, 6:28 PM CDT	Severe Thunderstorm Warning	JAN	Jasper, Jones	48 min
Mar 17, 6:42 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Clay, Kemper, Lowndes, Neshoba, Noxubee and 3 more	76 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2021 Severe Thunderstorm Warnings in Louisiana, 2021 Every 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; radar from the NEXRAD Level II archive.