Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Jackson, MS

March 17, 2021Covington County, Simpson County, Smith County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Mar 17, 2021, 6:12 PM CDT for Covington County, Simpson County, Smith County, Mississippi. It was in force for 48 min. 1 report 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, 6:12 PM CDT (23:12 UTC)
Expired: Mar 17, 2021, 7:00 PM CDT
In force: 48 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Covington County, MS, Simpson County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 75 km from the middle of the area, began a volume at 23:12 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, 6:24 PM CDT	TSTM WND DMG	Collins, MS	SCATTERED DOWNED TREES ACROSS COVINGTON COUNTY.

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.2 hours before the alert went out and 83 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.

809 
WUUS54 KJAN 172312
SVRJAN
MSC031-127-129-180000-
/O.NEW.KJAN.SV.W.0028.210317T2312Z-210318T0000Z/

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

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Eastern Simpson County in central Mississippi...
  Smith County in central Mississippi...
  Covington County in southeastern Mississippi...

* Until 700 PM CDT.

* At 612 PM CDT, severe thunderstorms were located along a line
  extending from near Clem to near Melba, moving northeast at 70 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Severe thunderstorms will be near...
  Magee, Collins and Sanatorium around 620 PM CDT.
  Martinville around 625 PM CDT.
  White Oak around 630 PM CDT.
  Raleigh and Taylorsville around 635 PM CDT.
  Burns, Pineville and Center Ridge around 640 PM CDT.

Other locations impacted by these severe thunderstorms include
Sylvarena, Seminary and Mize.

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 south central,
central, southeastern and east central Mississippi.

LAT...LON 3154 8960 3159 8971 3166 8976 3177 8976
      3177 8994 3222 8959 3222 8932 3180 8932
      3180 8940 3145 8940 3143 8941 3143 8958
TIME...MOT...LOC 2312Z 215DEG 61KT 3178 8984 3151 8968 

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

CME

3 follow-up statements

736 
WWUS54 KJAN 172326 RRA
SVSJAN

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

MSC127-172335-
/O.CAN.KJAN.SV.W.0028.000000T0000Z-210318T0000Z/
Simpson MS-
626 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SIMPSON COUNTY 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,
southeastern and east central Mississippi.

LAT...LON 3168 8958 3178 8965 3206 8966 3222 8959
      3222 8932 3180 8932 3180 8940 3145 8940
      3143 8941 3143 8958
TIME...MOT...LOC 2325Z 234DEG 51KT 3189 8960 3162 8944 

$$

MSC031-129-180000-
/O.CON.KJAN.SV.W.0028.000000T0000Z-210318T0000Z/
Smith MS-Covington MS-
626 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR SMITH AND COVINGTON COUNTIES...

At 625 PM CDT, severe thunderstorms were located along a line
extending from 7 miles east of Magee to 7 miles east of Collins,
moving northeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Raleigh and Center Ridge around 635 PM CDT.
  Pineville around 645 PM CDT.

Other locations impacted by these severe thunderstorms include
Sylvarena, Seminary and Mize.

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,
southeastern and east central Mississippi.

LAT...LON 3168 8958 3178 8965 3206 8966 3222 8959
      3222 8932 3180 8932 3180 8940 3145 8940
      3143 8941 3143 8958
TIME...MOT...LOC 2325Z 234DEG 51KT 3189 8960 3162 8944 

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

CME

764 
WWUS54 KJAN 172341
SVSJAN

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

MSC031-172350-
/O.CAN.KJAN.SV.W.0028.000000T0000Z-210318T0000Z/
Covington MS-
641 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR COVINGTON COUNTY 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,
southeastern and east central Mississippi.

LAT...LON 3222 8959 3222 8932 3180 8932 3180 8940
TIME...MOT...LOC 2340Z 237DEG 50KT 3207 8941 3180 8925 

$$

MSC129-180000-
/O.CON.KJAN.SV.W.0028.000000T0000Z-210318T0000Z/
Smith MS-
641 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR EASTERN SMITH COUNTY...

At 640 PM CDT, severe thunderstorms were located along a line
extending from near Pineville to near Stringer, moving northeast at
60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

These severe thunderstorms will remain over mainly rural areas of
eastern Smith County, including the following locations... Sylvarena.

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,
southeastern and east central Mississippi.

LAT...LON 3222 8959 3222 8932 3180 8932 3180 8940
TIME...MOT...LOC 2340Z 237DEG 50KT 3207 8941 3180 8925 

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

CME

211 
WWUS54 KJAN 172351
SVSJAN

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

MSC129-180001-
/O.EXP.KJAN.SV.W.0028.000000T0000Z-210318T0000Z/
Smith MS-
651 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN SMITH COUNTY WILL
EXPIRE AT 700 PM CDT...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 300 AM CDT for central,
southeastern and east central Mississippi.

LAT...LON 3222 8959 3222 8932 3180 8932 3180 8940
TIME...MOT...LOC 2351Z 215DEG 61KT 3222 8929 3195 8913 

$$

CME

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, 4:34 PM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Copiah, Hinds, Jefferson, Warren	56 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, 6:13 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 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.