Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 19, NWS Memphis, TN

March 17, 20214 counties in Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Mar 17, 2021, 4:17 PM CDT for 4 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: Mar 17, 2021, 4:17 PM CDT (21:17 UTC)
Expired: Mar 17, 2021, 4:45 PM CDT
In force: 28 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Calhoun County, MS, Lafayette County, MS, Pontotoc County, MS, Union County, MS

The radar

The Columbus AFB radar (KGWX), 104 km from the middle of the area, began a volume at 21:18 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
Mar 17, 12:57 PM CDT	Tornado Watch PDS	SPC	6 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 9.3 hours before the alert went out and 85 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: 18 J/kg
Mixed-layer CIN: -262 J/kg
Mixed-layer LCL: 1466 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

034 
WUUS54 KMEG 172117
SVRMEG
MSC013-071-115-145-172145-
/O.NEW.KMEG.SV.W.0019.210317T2117Z-210317T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
417 PM CDT Wed Mar 17 2021

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Southeastern Lafayette County in northwestern Mississippi...
  Northwestern Calhoun County in northeastern Mississippi...
  Southwestern Union County in northeastern Mississippi...
  Northwestern Pontotoc County in northeastern Mississippi...

* Until 445 PM CDT.

* At 416 PM CDT, a severe thunderstorm was located over Paris, or 10
  miles east of Water Valley, moving northeast at 40 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...
  Pontotoc, Ecru, Banner, Tula, Denmark, Pinedale, Paris, Thaxton,
  Toccopola, Nixon, Altus, Hortontown, Keel, Esperanza, Delay,
  Buchannan, Springville, Lafayette Springs and Yocona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM CDT for northeastern
and northwestern Mississippi.

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Memphis.

&&

LAT...LON 3414 8951 3419 8951 3419 8959 3451 8928
      3430 8894 3407 8942
TIME...MOT...LOC 2116Z 218DEG 35KT 3420 8945 

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

MJH

1 follow-up statement

388 
WWUS54 KMEG 172127
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
427 PM CDT Wed Mar 17 2021

MSC013-172137-
/O.CAN.KMEG.SV.W.0019.000000T0000Z-210317T2145Z/
Calhoun MS-
427 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CALHOUN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 700 PM CDT for northeastern
and northwestern Mississippi.

LAT...LON 3416 8925 3416 8951 3419 8951 3419 8959
      3451 8928 3430 8894
TIME...MOT...LOC 2127Z 218DEG 35KT 3429 8937 

$$

MSC071-115-145-172145-
/O.CON.KMEG.SV.W.0019.000000T0000Z-210317T2145Z/
Lafayette MS-Union MS-Pontotoc MS-
427 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR SOUTHEASTERN LAFAYETTE...SOUTHWESTERN UNION AND NORTHWESTERN
PONTOTOC COUNTIES...

At 427 PM CDT, a severe thunderstorm was located over Denmark, or 10
miles southeast of Oxford, moving northeast at 40 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...
Pontotoc, Ecru, Tula, Denmark, Pinedale, Paris, Thaxton, Toccopola,
Nixon, Altus, Hortontown, Keel, Esperanza, Delay, Buchannan,
Springville, Lafayette Springs and Yocona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM CDT for northeastern
and northwestern Mississippi.

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Memphis.

&&

LAT...LON 3416 8925 3416 8951 3419 8951 3419 8959
      3451 8928 3430 8894
TIME...MOT...LOC 2127Z 218DEG 35KT 3429 8937 

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

MJH

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 3:38 AM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Pontotoc, Yalobusha	37 min
Mar 17, 5:24 AM CDT	Severe Thunderstorm Warning	MEG	Panola, Tate	20 min
Mar 17, 6:35 AM CDT	Severe Thunderstorm Warning	MEG	Coahoma, Panola, Quitman, Tallahatchie, Tunica	40 min
Mar 17, 6:49 AM CDT	Severe Thunderstorm Warning	MEG	Marshall	14 min
Mar 17, 7:12 AM CDT	Severe Thunderstorm Warning	MEG	Lafayette, Marshall, Panola, Quitman, Tallahatchie, Tate and 1 more	48 min
Mar 17, 8:24 AM CDT	Areal Flood Advisory	MEG	Benton, DeSoto, Marshall, Tate, Tunica	2 hr
Mar 17, 9:04 AM CDT	Flash Flood Warning	MEG	Alcorn, Benton, DeSoto, Marshall, Tate, Tippah	3 hr
Mar 17, 10:29 AM CDT	Flash Flood Warning	MEG	Alcorn, Prentiss, Tishomingo	3 hr
Mar 17, 3:18 PM CDT	Tornado Warning	MEG	Itawamba, Prentiss, Tishomingo	27 min
Mar 17, 4:28 PM CDT	Areal Flood Advisory	MEG	Itawamba, Prentiss, Tishomingo	5 hr
Mar 17, 4:43 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Lafayette, Marshall, Union	32 min
Mar 17, 4:52 PM CDT	Flash Flood Warning	MEG	Itawamba, Lee, Prentiss, Tishomingo	4 hr
Mar 17, 4:56 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Pontotoc, Prentiss, Union	49 min
Mar 17, 4:58 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Pontotoc	20 min
Mar 17, 5:45 PM CDT	Severe Thunderstorm Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	45 min
Mar 17, 5:55 PM CDT	Flash Flood Warning	MEG	Calhoun, Chickasaw	4 hr
Mar 17, 5:55 PM CDT	Tornado Warning	MEG	Chickasaw, Itawamba, Lee, Monroe	35 min
Mar 17, 6:28 PM CDT	Severe Thunderstorm Warning	MEG	Itawamba, Monroe	47 min
Mar 17, 6:33 PM CDT	Special Weather Statement	MEG	Lafayette, Marshall, Yalobusha	42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.