Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 15, NWS Memphis, TN

March 17, 2021Fayette County, Tennessee; Marshall County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Mar 17, 2021, 6:49 AM CDT for Fayette County, Tennessee; Marshall County, Mississippi. It was in force for 14 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, 6:49 AM CDT (11:49 UTC)
Expired
Mar 17, 2021, 7:03 AM CDT
In force
14 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Marshall County, MS, Fayette County, TN

The radar

The Memphis radar (KNQA), 56 km from the middle of the area, began a volume at 11:51 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.

IssuedProductOfficeLasted
Mar 17, 5:53 AM CDTTornado WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 11.8 hours before the alert went out and 35 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-pSkew-T log-p diagram, Little Rock, AR at 00:00Z on 2021-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2021-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2044 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
260 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

987 
WUUS54 KMEG 171149
SVRMEG
MSC093-TNC047-171215-
/O.NEW.KMEG.SV.W.0015.210317T1149Z-210317T1215Z/

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

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Northwestern Marshall County in northwestern Mississippi...
  Southwestern Fayette County in western Tennessee...

* Until 715 AM CDT.

* At 648 AM CDT, a severe thunderstorm was located near Red Banks, or
  11 miles northwest of Holly Springs, moving northeast at 35 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Byhalia, Mt Pleasant, Red Banks, Slayden, Piperton, Rossville, Coal
  Oil Corner, Taska, Cayce, Victoria, Early Grove and Mack.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 100 PM CDT for northeastern
and northwestern Mississippi...and western Tennessee.

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. 

&&

LAT...LON 3483 8973 3491 8972 3511 8954 3497 8935
      3493 8935 3475 8962
TIME...MOT...LOC 1148Z 223DEG 31KT 3487 8962 

HAIL...1.00IN
WIND...<50MPH
 
$$

MGW
1 follow-up statement
839 
WWUS54 KMEG 171203
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
703 AM CDT Wed Mar 17 2021

MSC093-TNC047-171212-
/O.CAN.KMEG.SV.W.0015.000000T0000Z-210317T1215Z/
Marshall MS-Fayette TN-
703 AM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MARSHALL AND
SOUTHWESTERN FAYETTE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 100 PM CDT for northeastern
and northwestern Mississippi...and western Tennessee.

LAT...LON 3483 8973 3491 8972 3511 8954 3497 8935
      3493 8935 3475 8962
TIME...MOT...LOC 1201Z 223DEG 31KT 3496 8951 

$$

MGW

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 17, 9:04 AM CDTFlash Flood WarningMEGFayette, Hardeman, McNairy3 hr
Mar 17, 11:38 AM CDTFlash Flood WarningMEGShelby, Tipton3 hr
Mar 17, 12:24 PM CDTSpecial Weather StatementMEGShelby36 min
Mar 17, 12:31 PM CDTSpecial Weather StatementMEGTipton29 min
Mar 17, 1:18 PM CDTSevere Thunderstorm WarningMEGChester, Fayette, Hardeman, Haywood, Madison, Tipton42 min
Mar 17, 1:54 PM CDTFlash Flood WarningMEGShelby3 hr
Mar 17, 1:58 PM CDTSevere Thunderstorm WarningMEGChester, Decatur, Hardeman, Henderson, Madison47 min
Mar 17, 5:26 PM CDTRiver Flood WarningMEGCrockett, Dyer, Lauderdale15 hr
Mar 17, 3:38 AM CDTSevere Thunderstorm WarningMEGCalhoun, Lafayette, Pontotoc, Yalobusha37 min
Mar 17, 5:24 AM CDTSevere Thunderstorm WarningMEGPanola, Tate20 min
Mar 17, 6:35 AM CDTSevere Thunderstorm WarningMEGCoahoma, Panola, Quitman, Tallahatchie, Tunica40 min
Mar 17, 7:12 AM CDTSevere Thunderstorm WarningMEGLafayette, Marshall, Panola, Quitman, Tallahatchie, Tate and 1 more48 min
Mar 17, 8:24 AM CDTAreal Flood AdvisoryMEGBenton, DeSoto, Marshall, Tate, Tunica2 hr
Mar 17, 10:29 AM CDTFlash Flood WarningMEGAlcorn, Prentiss, Tishomingo3 hr
Mar 17, 3:18 PM CDTTornado WarningMEGItawamba, Prentiss, Tishomingo27 min
Mar 17, 4:17 PM CDTSevere Thunderstorm WarningMEGCalhoun, Lafayette, Pontotoc, Union28 min
Mar 17, 4:28 PM CDTAreal Flood AdvisoryMEGItawamba, Prentiss, Tishomingo5 hr
Mar 17, 4:43 PM CDTSevere Thunderstorm WarningMEGBenton, Lafayette, Marshall, Union32 min
Mar 17, 4:52 PM CDTFlash Flood WarningMEGItawamba, Lee, Prentiss, Tishomingo4 hr
Mar 17, 4:56 PM CDTSevere Thunderstorm WarningMEGChickasaw, Itawamba, Lee, Pontotoc, Prentiss, Union49 min
Mar 17, 4:58 PM CDTSevere Thunderstorm WarningMEGCalhoun, Chickasaw, Pontotoc20 min
Mar 17, 5:45 PM CDTSevere Thunderstorm WarningMEGChickasaw, Itawamba, Lee, Monroe45 min
Mar 17, 5:55 PM CDTFlash Flood WarningMEGCalhoun, Chickasaw4 hr
Mar 17, 5:55 PM CDTTornado WarningMEGChickasaw, Itawamba, Lee, Monroe35 min
Mar 17, 6:28 PM CDTSevere Thunderstorm WarningMEGItawamba, Monroe47 min
Mar 17, 6:33 PM CDTSpecial Weather StatementMEGLafayette, Marshall, Yalobusha42 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021Severe Thunderstorm Warnings in Mississippi, 2021Every 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.