Alert archive / Mississippi / Tornado Warnings in 2020

Tornado Warning 41, NWS Jackson, MS

April 12, 2020Kemper County, Mississippi

NWS Jackson, MS issued this tornado warning at Apr 12, 2020, 7:13 PM CDT for Kemper County, Mississippi. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 12, 2020, 7:13 PM CDT (00:13 UTC)
Expired: Apr 12, 2020, 7:34 PM CDT
In force: 21 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Kemper County, MS

The radar

The Columbus AFB radar (KGWX), 140 km from the middle of the area, began a volume at 00:17 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 12, 10:41 AM CDT	Tornado Watch PDS	SPC	10 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 0.2 hours before the alert went out and 153 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: 1242 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 87 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 61 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

305 
WFUS54 KJAN 130013
TORJAN
MSC069-130115-
/O.NEW.KJAN.TO.W.0041.200413T0013Z-200413T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
713 PM CDT Sun Apr 12 2020

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Southeastern Kemper County in east central Mississippi...

* Until 815 PM CDT.
    
* At 713 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Meridian Station, moving northeast at 60 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Porterville around 720 PM CDT.
  Electric Mills around 725 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3260 8839 3258 8847 3258 8867 3267 8869
      3286 8836
TIME...MOT...LOC 0013Z 237DEG 53KT 3260 8859 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

19

2 follow-up statements

439 
WWUS54 KJAN 130021 RRA
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
721 PM CDT Sun Apr 12 2020

MSC069-130115-
/O.CON.KJAN.TO.W.0041.000000T0000Z-200413T0115Z/
Kemper MS-
721 PM CDT Sun Apr 12 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
SOUTHEASTERN KEMPER COUNTY...
    
At 721 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Porterville, or 12 miles north of Lauderdale, moving
northeast at 60 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This tornadic thunderstorm will remain over mainly rural areas of
southeastern Kemper County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3264 8839 3261 8847 3261 8852 3274 8856
      3286 8836
TIME...MOT...LOC 0021Z 233DEG 51KT 3270 8845 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

19

201 
WWUS54 KJAN 130034
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
734 PM CDT Sun Apr 12 2020

MSC069-130044-
/O.CAN.KJAN.TO.W.0041.000000T0000Z-200413T0115Z/
Kemper MS-
734 PM CDT Sun Apr 12 2020

...THE TORNADO WARNING FOR SOUTHEASTERN KEMPER COUNTY IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.  However, gusty winds are 
still possible with this thunderstorm.

A Tornado Watch remains in effect until 800 PM CDT for east central
Mississippi.

LAT...LON 3264 8839 3261 8847 3261 8852 3274 8856
      3286 8836
TIME...MOT...LOC 0033Z 237DEG 53KT 3281 8826 

$$

19

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 12, 7:57 PM CDT	Flash Flood Warning	JAN	Kemper, Lauderdale, Neshoba, Newton	3 hr
Apr 12, 8:03 PM CDT	River Flood Warning	JAN	Leake	16 days
Apr 12, 8:03 PM CDT	River Flood Warning	JAN	Leake	17 days
Apr 12, 8:03 PM CDT	River Flood Warning	JAN	Attala	25 hr
Apr 12, 8:03 PM CDT	River Flood Warning	JAN	Leake	21 days
Apr 12, 8:20 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar	25 min
Apr 12, 8:42 PM CDT	River Flood Warning	JAN	Lowndes	71 hr
Apr 12, 8:44 PM CDT	Severe Thunderstorm Warning	JAN	Washington	76 min
Apr 12, 8:46 PM CDT	Severe Thunderstorm Warning	JAN	Bolivar	74 min
Apr 12, 9:09 PM CDT	Severe Thunderstorm Warning	JAN	Issaquena, Sharkey	51 min
Apr 12, 9:22 PM CDT	Severe Thunderstorm Warning	JAN	Sunflower	53 min
Apr 12, 9:36 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Leflore	54 min
Apr 12, 9:44 PM CDT	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Issaquena, Sharkey, Yazoo	61 min
Apr 12, 10:05 PM CDT	Severe Thunderstorm Warning	JAN	Carroll, Choctaw, Grenada, Montgomery, Webster	55 min
Apr 12, 10:27 PM CDT	Severe Thunderstorm Warning	JAN	Attala, Leake, Madison	63 min
Apr 12, 10:34 PM CDT	Special Weather Statement	JAN	Claiborne, Hinds, Rankin	56 min
Apr 12, 10:40 PM CDT	Severe Thunderstorm Warning	JAN	Choctaw, Clay, Lowndes, Noxubee, Oktibbeha, Winston	80 min
Apr 12, 11:01 PM CDT	Severe Thunderstorm Warning	JAN	Kemper, Neshoba, Noxubee, Winston	47 min
Apr 12, 11:06 PM CDT	Special Weather Statement	JAN	Copiah, Rankin, Simpson, Smith	39 min

Nearby

Tornado Warnings in Mississippi, 2020 Every tornado warning in 2020 Tornadoes in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.