Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Memphis, TN

February 28, 20216 counties in Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Feb 28, 2021, 8:42 PM CST for 6 counties in Mississippi. It was in force for 28 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: Feb 28, 2021, 8:42 PM CST (02:42 UTC)
Expired: Feb 28, 2021, 9:10 PM CST
In force: 28 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Alcorn County, MS, Benton County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS

The radar

The Columbus AFB radar (KGWX), 90 km from the middle of the area, began a volume at 02:42 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 28, 2:22 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 2.7 hours before the alert went out and 110 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: 229 J/kg
Mixed-layer CIN: -269 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: -399 m²/s²
0-3 km storm-relative helicity: -284 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.4

Open this sounding in Storm Lab

The text

As transmitted.

049 
WUUS54 KMEG 010242
SVRMEG
MSC003-009-117-139-141-145-010330-
/O.NEW.KMEG.SV.W.0011.210301T0242Z-210301T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
842 PM CST Sun Feb 28 2021

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Union County in northeastern Mississippi...
  Tippah County in northeastern Mississippi...
  Eastern Benton County in northeastern Mississippi...
  Northwestern Tishomingo County in northeastern Mississippi...
  Prentiss County in northeastern Mississippi...
  Alcorn County in northeastern Mississippi...

* Until 930 PM CST.

* At 840 PM CST, severe thunderstorms were located along a line
  extending from near Gravestown to near Blue Mountain to near Etta,
  moving east at 60 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Corinth, Booneville, New Albany, Ripley, Baldwyn, Blue Mountain,
  Jumpertown, Glen, Thrashers, Keownville, Theo, Hinkle, Wheeler,
  Etta, Leedy, Gravestown, Farmington, Walnut, Falkner and Myrtle.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CST for northeastern
and northwestern Mississippi...and western Tennessee.

Remain alert for a possible tornado!

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms.

&&

LAT...LON 3454 8836 3451 8861 3451 8873 3450 8874
      3450 8879 3448 8879 3442 8925 3447 8925
      3462 8917 3490 8914 3500 8854 3500 8834
TIME...MOT...LOC 0240Z 257DEG 52KT 3483 8909 3464 8912 3448 8923 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

MGW

1 follow-up statement

244 
WWUS54 KMEG 010310
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
910 PM CST Sun Feb 28 2021

MSC003-009-117-139-141-145-010319-
/O.CAN.KMEG.SV.W.0011.000000T0000Z-210301T0330Z/
Union MS-Tippah MS-Benton MS-Tishomingo MS-Prentiss MS-Alcorn MS-
910 PM CST Sun Feb 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR UNION...TIPPAH...EASTERN
BENTON...NORTHWESTERN TISHOMINGO...PRENTISS AND ALCORN COUNTIES IS
CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1000 PM CST for northeastern
and northwestern Mississippi...and western Tennessee.

LAT...LON 3454 8836 3451 8861 3451 8873 3450 8874
      3450 8879 3448 8879 3442 8925 3447 8925
      3462 8917 3490 8914 3500 8854 3500 8834
TIME...MOT...LOC 0308Z 257DEG 52KT 3492 8861 3473 8864 3457 8875 

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 28, 7:22 PM CST	Special Weather Statement	MEG	Tunica	38 min
Feb 28, 8:06 PM CST	Severe Thunderstorm Warning	MEG	Benton, Lafayette, Marshall, Panola, Tate, Union	39 min
Feb 28, 8:14 PM CST	Tornado Warning	MEG	Benton, Lafayette, Marshall, Tippah, Union	46 min
Mar 1, 2:06 AM CST	Areal Flood Warning	MEG	DeSoto, Marshall	3 hr
Mar 1, 3:32 AM CST	Areal Flood Advisory	MEG	Coahoma, DeSoto, Marshall, Panola, Quitman, Tate and 1 more	3 hr
Mar 1, 5:10 AM CST	River Flood Warning	MEG	Tate, Tunica	23 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.