Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 207, NWS Memphis, TN

December 11, 20215 counties in Tennessee; Crittenden County, Arkansas

NWS Memphis, TN issued this severe thunderstorm warning at Dec 11, 2021, 12:30 AM CST for 5 counties in Tennessee; Crittenden County, Arkansas. It was in force for 30 min. 4 reports 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
Dec 11, 2021, 12:30 AM CST (06:30 UTC)
Expired
Dec 11, 2021, 1:00 AM CST
In force
30 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Crittenden County, AR, Fayette County, TN, Hardeman County, TN, Haywood County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 16 km from the middle of the area, began a volume at 06:29 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

TimeReportWhereRemark
Dec 11, 12:31 AM CSTTSTM WND DMG4 Sse Southeast Memphis, TNTREE ON HOUSE ON E. SHELBY DRIVE,
Dec 11, 12:40 AM CSTTORNADO6 Nne Oakland, TNPHOTO EVIDENCE OF A BRIEF TORNADO NORTHWEST OF SOMERVILLE.
Dec 11, 12:50 AM CSTTSTM WND DMG2 Wnw Collierville, TNTREE AND UTILITY POLE DOWN ON FRANK RD NEAR HOUSTON LEVEE ROAD.
Dec 11, 1:00 AM CSTTSTM WND DMG2 Se Midtown Memphis, TNTREE DOWN ON CAR ON GREER ST IN ORANGE MOUND.

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.

IssuedProductOfficeLasted
Dec 10, 3:07 PM CSTTornado WatchSPC11 hr
Dec 10, 10:44 PM CSTTornado WatchSPC6 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 6.5 hours before the alert went out and 52 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 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1725 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 398 square meters per square second.1939587897117Sfc1 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
1725 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
759 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
398 m²/s²
0-3 km storm-relative helicity
420 m²/s²
Significant tornado parameter
4.8
Supercell composite
16.2

Open this sounding in Storm Lab

The text

As transmitted.

269 
WUUS54 KMEG 110630
SVRMEG
ARC035-TNC047-069-075-157-167-110700-
/O.NEW.KMEG.SV.W.0207.211211T0630Z-211211T0700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
1230 AM CST Sat Dec 11 2021

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  East central Crittenden County in eastern Arkansas...
  Southeastern Tipton County in western Tennessee...
  Fayette County in western Tennessee...
  Northwestern Hardeman County in western Tennessee...
  Haywood County in western Tennessee...
  Shelby County in western Tennessee...

* Until 100 AM CST.

* At 1230 AM CST, a severe thunderstorm was located near Arlington,
  or 15 miles northeast of Cordova, moving northeast at 65 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...
  Bartlett, Collierville, Germantown, West Memphis, Marion,
  Brownsville, Millington, T O Fuller State Park, Cordova, Memphis,
  Lakeland, Arlington, Whiteville, Somerville, Brighton, Southwest
  Memphis, Hillville, Whitehaven, Southeast Memphis and Eads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 AM CST for eastern
Arkansas...northwestern Mississippi...and western Tennessee.

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

A Tornado Watch remains in effect until 500 AM CST for eastern
Arkansas...northwestern Mississippi...and western Tennessee.

&&

LAT...LON 3514 9026 3569 8934 3563 8907 3526 8907
      3500 8979 3499 9031
TIME...MOT...LOC 0630Z 237DEG 57KT 3531 8957 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJ

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 7:28 PM CSTTornado Warning EmergencyTornado observedConsiderable damage threatMEGDyer, Lake, Lauderdale47 min
Dec 10, 8:04 PM CSTTornado Warning EmergencyTornado observedCatastrophic damage threatMEGDyer, Lake, Obion41 min
Dec 10, 8:28 PM CSTTornado Warning Tornado observedConsiderable damage threatMEGLake, Obion30 min
Dec 10, 9:24 PM CSTTornado WarningMEGLauderdale51 min
Dec 10, 9:25 PM CSTSevere Thunderstorm Warning Considerable damage threatMEGTipton50 min
Dec 10, 9:52 PM CSTTornado WarningMEGDyer, Lake, Obion38 min
Dec 10, 10:01 PM CSTTornado WarningMEGDyer, Haywood, Lauderdale44 min
Dec 10, 10:27 PM CSTTornado WarningMEGCrockett, Dyer, Gibson, Obion, Weakley48 min
Dec 10, 10:34 PM CSTTornado WarningMEGObion27 min
Dec 10, 10:59 PM CSTTornado Warning Tornado observedConsiderable damage threatMEGHenry, Weakley46 min
Dec 10, 11:20 PM CSTSevere Thunderstorm WarningMEGDyer, Lauderdale15 min
Dec 10, 11:25 PM CSTSevere Thunderstorm WarningMEGShelby9 min
Dec 10, 11:37 PM CSTTornado Warning Tornado observedConsiderable damage threatMEGHenry27 min
Dec 10, 11:41 PM CSTAreal Flood AdvisoryMEGDyer, Gibson, Henry, Lauderdale, Obion, Weakley3 hr
Dec 10, 11:48 PM CSTSevere Thunderstorm WarningMEGFayette, Shelby42 min
Dec 10, 11:52 PM CSTTornado WarningMEGShelby, Tipton34 min
Dec 11, 12:05 AM CSTTornado WarningMEGShelby22 min
Dec 11, 12:26 AM CSTSpecial Weather StatementMEGHenry34 min
Dec 11, 12:35 AM CSTAreal Flood AdvisoryMEGShelby4 hr
Dec 11, 12:36 AM CSTTornado Warning Tornado observedMEGFayette, Hardeman, Haywood24 min
Dec 11, 12:56 AM CSTAreal Flood AdvisoryMEGHenry, Weakley3 hr
Dec 11, 12:57 AM CSTSevere Thunderstorm WarningMEGCarroll, Crockett, Fayette, Gibson, Hardeman, Haywood and 1 more48 min
Dec 11, 12:59 AM CSTSevere Thunderstorm WarningMEGFayette, Hardeman, Shelby31 min
Dec 11, 1:25 AM CSTSevere Thunderstorm WarningMEGBenton, Carroll, Chester, Decatur, Gibson, Hardeman and 2 more65 min
Dec 11, 1:30 AM CSTSpecial Weather StatementMEGFayette, Hardeman30 min
Dec 11, 1:32 AM CSTTornado WarningMEGCarroll, Chester, Henderson, Madison28 min
Dec 11, 1:53 AM CSTTornado WarningMEGBenton, Carroll, Decatur, Henderson25 min
Dec 11, 2:26 AM CSTSpecial Weather StatementMEGDecatur, Hardin, McNairy34 min
Dec 11, 2:51 AM CSTFlash Flood WarningMEGShelby2 hr
Dec 11, 3:03 AM CSTSevere Thunderstorm WarningMEGHardeman, McNairy42 min
Dec 11, 3:19 AM CSTAreal Flood AdvisoryMEGChester, Decatur, Fayette, Hardeman, Hardin, Henderson and 1 more3 hr
Dec 11, 3:21 AM CSTSpecial Weather StatementMEGHardin24 min
Dec 11, 3:30 AM CSTTornado WarningMEGHardin, McNairy21 min
Dec 11, 4:07 AM CSTSpecial Weather StatementMEGHardin23 min
Dec 11, 4:32 AM CSTSpecial Weather StatementMEGHardin28 min
Dec 11, 6:56 AM CSTWind AdvisoryMEGBenton, Carroll, Crockett, Dyer, Gibson, Henry and 4 more5 hr
Dec 10, 6:07 PM CSTTornado WarningMEGCraighead, Poinsett38 min
Dec 10, 6:39 PM CSTTornado WarningMEGCraighead, Greene, Mississippi, Poinsett51 min
Dec 10, 7:06 PM CSTTornado Warning Tornado observedConsiderable damage threatMEGCraighead, Greene, Mississippi39 min
Dec 10, 8:14 PM CSTTornado WarningMEGCraighead, Greene34 min
Dec 10, 8:20 PM CSTTornado WarningMEGCross, Poinsett40 min
Dec 10, 8:57 PM CSTTornado WarningMEGCraighead, Poinsett48 min
Dec 10, 8:59 PM CSTTornado WarningMEGCraighead, Crittenden, Cross, Poinsett31 min
Dec 10, 9:18 PM CSTTornado WarningMEGCraighead, Mississippi, Poinsett42 min
Dec 10, 9:39 PM CSTAreal Flood AdvisoryMEGCraighead, Cross, Poinsett3 hr
Dec 10, 10:46 PM CSTSevere Thunderstorm WarningMEGLee, St. Francis44 min
Dec 11, 12:02 AM CSTSevere Thunderstorm WarningMEGCrittenden, Lee, St. Francis43 min
Dec 11, 12:46 AM CSTSevere Thunderstorm WarningMEGLee, Phillips, St. Francis44 min
Dec 11, 12:48 AM CSTSevere Thunderstorm WarningMEGCrittenden, Lee, St. Francis42 min
Dec 11, 1:43 AM CSTSpecial Weather StatementMEGPhillips32 min
Dec 11, 2:12 AM CSTAreal Flood AdvisoryMEGCrittenden, Lee3 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 2021Severe Thunderstorm Warnings in Arkansas, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.