Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 216, NWS Memphis, TN

December 11, 20214 counties in Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Dec 11, 2021, 3:59 AM CST for 4 counties in Mississippi. It was in force for 31 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
Dec 11, 2021, 3:59 AM CST (09:59 UTC)
Expired
Dec 11, 2021, 4:30 AM CST
In force
31 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Lafayette County, MS, Lee County, MS, Pontotoc County, MS, Union County, MS

The radar

The Columbus AFB radar (KGWX), 83 km from the middle of the area, began a volume at 10:03 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
Dec 10, 6:21 PM CSTTornado WatchSPC10 hr
Dec 10, 10:44 PM CSTTornado WatchSPC6 hr
Dec 11, 3:41 AM CSTTornado WatchSPC6 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 10.0 hours before the alert went out and 100 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.

280 
WUUS54 KMEG 110959
SVRMEG
MSC071-081-115-145-111030-
/O.NEW.KMEG.SV.W.0216.211211T0959Z-211211T1030Z/

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

The National Weather Service in Memphis has issued a

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

* Until 430 AM CST.

* At 359 AM CST, a severe thunderstorm was located near Tula, or 14
  miles west of Pontotoc, moving east at 45 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...
  Tupelo, Pontotoc, Trace State Park, Ecru, New Harmony, Randolph,
  Furrs, Denmark, Sherman, Thaxton, Algoma, Toccopola, Blue Springs,
  Hortontown, Esperanza, Endville, Cherry Creek, Branyan, Ellistown
  and Delay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 AM CST for northeastern
and northwestern Mississippi. A Tornado Watch also remains in effect
until 1100 AM CST for northeastern Mississippi.

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 northeastern
and northwestern Mississippi. A Tornado Watch also remains in effect
until 1100 AM CST for northeastern Mississippi.

&&

LAT...LON 3416 8925 3416 8931 3431 8937 3450 8880
      3424 8870 3414 8925
TIME...MOT...LOC 0959Z 252DEG 41KT 3425 8926 

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

$$

SWB
2 follow-up statements
711 
WWUS54 KMEG 111019
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
419 AM CST Sat Dec 11 2021

MSC071-081-115-145-111030-
/O.CON.KMEG.SV.W.0216.000000T0000Z-211211T1030Z/
Lafayette MS-Pontotoc MS-Union MS-Lee MS-
419 AM CST Sat Dec 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CST
FOR EAST CENTRAL LAFAYETTE...PONTOTOC...SOUTHEASTERN UNION AND
NORTHWESTERN LEE COUNTIES...

At 419 AM CST, a severe thunderstorm was located near Ecru, or near
Pontotoc, moving east at 45 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...
Tupelo, Pontotoc, Trace State Park, Ecru, New Harmony, Randolph,
Furrs, Sherman, Thaxton, Algoma, Toccopola, Blue Springs, Hortontown,
Esperanza, Endville, Cherry Creek, Branyan, Ellistown, Jug Fork and
Flowerdale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 500 AM CST for northeastern
and northwestern Mississippi. A Tornado Watch also remains in effect
until 1100 AM CST for northeastern Mississippi.

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

&&

LAT...LON 3415 8923 3433 8930 3450 8880 3424 8870
TIME...MOT...LOC 1019Z 252DEG 41KT 3432 8899 

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

$$

SWB
715 
WWUS54 KMEG 111027
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
427 AM CST Sat Dec 11 2021

MSC071-081-115-145-111037-
/O.EXP.KMEG.SV.W.0216.000000T0000Z-211211T1030Z/
Lafayette MS-Pontotoc MS-Union MS-Lee MS-
427 AM CST Sat Dec 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LAFAYETTE...
PONTOTOC...SOUTHEASTERN UNION AND NORTHWESTERN LEE COUNTIES WILL
EXPIRE AT 430 AM CST...
                
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 will be allowed to expire.

A Tornado Watch remains in effect until 500 AM CST for northeastern
and northwestern Mississippi. A Tornado Watch also remains in effect
until 1100 AM CST for northeastern Mississippi.

LAT...LON 3415 8923 3433 8930 3450 8880 3424 8870
TIME...MOT...LOC 1027Z 252DEG 41KT 3435 8889 

$$

SWB

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 10:46 PM CSTSevere Thunderstorm WarningMEGTunica44 min
Dec 10, 11:25 PM CSTSevere Thunderstorm WarningMEGDeSoto9 min
Dec 10, 11:48 PM CSTSevere Thunderstorm WarningMEGDeSoto, Marshall42 min
Dec 11, 12:46 AM CSTSevere Thunderstorm WarningMEGTunica44 min
Dec 11, 12:48 AM CSTSevere Thunderstorm WarningMEGDeSoto, Tunica42 min
Dec 11, 2:12 AM CSTAreal Flood AdvisoryMEGDeSoto, Tunica3 hr
Dec 11, 2:41 AM CSTSevere Thunderstorm WarningMEGBenton, Marshall49 min
Dec 11, 2:44 AM CSTAreal Flood AdvisoryMEGDeSoto2 hr
Dec 11, 2:51 AM CSTFlash Flood WarningMEGDeSoto2 hr
Dec 11, 2:55 AM CSTSevere Thunderstorm WarningMEGPanola, Tallahatchie, Yalobusha50 min
Dec 11, 3:03 AM CSTSevere Thunderstorm WarningMEGAlcorn, Benton, Tippah42 min
Dec 11, 3:19 AM CSTAreal Flood AdvisoryMEGBenton, Marshall, Tippah3 hr
Dec 11, 4:03 AM CSTFlash Flood WarningMEGCalhoun, Lafayette, Lee, Pontotoc, Prentiss, Tallahatchie and 3 more2 hr
Dec 11, 4:07 AM CSTSpecial Weather StatementMEGAlcorn23 min
Dec 11, 4:21 AM CSTSevere Thunderstorm WarningMEGItawamba, Lee, Prentiss, Tishomingo39 min
Dec 11, 4:25 AM CSTTornado WarningMEGItawamba, Prentiss, Tishomingo35 min
Dec 11, 4:55 AM CSTAreal Flood AdvisoryMEGAlcorn, Prentiss, Tippah, Tishomingo3 hr
Dec 11, 4:58 AM CSTSevere Thunderstorm WarningMEGItawamba, Lee, Prentiss, Tishomingo47 min
Dec 11, 5:12 AM CSTSevere Thunderstorm WarningMEGItawamba, Lee, Prentiss, Tishomingo33 min
Dec 11, 5:56 AM CSTSpecial Weather StatementMEGMonroe79 min

Nearby

Severe 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.