Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS Jackson, MS

March 17, 2021Kemper County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Mar 17, 2021, 7:43 PM CDT for Kemper County, Mississippi. It was in force for 30 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, 7:43 PM CDT (00:43 UTC)
Expired: Mar 17, 2021, 8:13 PM CDT
In force: 30 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Kemper County, MS

The radar

The Columbus AFB radar (KGWX), 130 km from the middle of the area, began a volume at 00:42 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, 7:56 PM CDT	TORNADO	3 W Porterville, MS	THIS BRIEF EF0 TOUCHED DOWN NEAR THE INTERSECTION OF FIRE TOWER AND CHAPEL HILL ROAD. GROUND SURVEY AND DRONE FOOTAGE SHOWED SOME TREES DAMAGED BY BEING UPROOTED OR HAVING BROKEN LIMBS. MANY THANKS TO THE NSSL RESEARCH GROUP FOR THE SURVEY.

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, 6:48 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.7 hours before the alert went out and 171 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: 188 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 465 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

272 
WUUS54 KJAN 180043
SVRJAN
MSC069-180130-
/O.NEW.KJAN.SV.W.0032.210318T0043Z-210318T0130Z/

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

The National Weather Service in Jackson has issued a

* Severe Thunderstorm Warning for...
  Kemper County in east central Mississippi...

* Until 830 PM CDT.

* At 743 PM CDT, a severe thunderstorm was located over Blackwater,
  or near Meridian Station, moving northeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* This severe thunderstorm will be near...
  Porterville around 755 PM CDT.
  Electric Mills around 800 PM CDT.

Other locations impacted by this severe thunderstorm include Scooba.

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 300 AM CDT for east central
Mississippi.

LAT...LON 3258 8839 3258 8874 3283 8876 3292 8855
      3293 8835
TIME...MOT...LOC 0043Z 226DEG 49KT 3262 8865 

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

CME

1 follow-up statement

107 
WWUS54 KJAN 180113
SVSJAN

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

MSC069-180123-
/O.CAN.KJAN.SV.W.0032.000000T0000Z-210318T0130Z/
Kemper MS-
813 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR KEMPER COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

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

LAT...LON 3258 8839 3258 8874 3283 8876 3292 8855
      3293 8835
TIME...MOT...LOC 0111Z 226DEG 49KT 3291 8830 

$$

CME

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 7:48 PM CDT	Tornado Warning	JAN	Kemper	27 min
Mar 18, 8:51 AM CDT	River Flood Warning	JAN	Leake	24 hr

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.