Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 199, NWS Memphis, TN

December 6, 20214 counties in Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Dec 6, 2021, 5:09 AM CST for 4 counties in Mississippi. It was in force for 36 min. 1 report 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 6, 2021, 5:09 AM CST (11:09 UTC)
Expired: Dec 6, 2021, 5:45 AM CST
In force: 36 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Lafayette County, MS, Marshall County, MS, Pontotoc County, MS, Union County, MS

The radar

The Columbus AFB radar (KGWX), 108 km from the middle of the area, began a volume at 11:09 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

Time	Report	Where	Remark
Dec 6, 5:30 AM CST	TSTM WND DMG	New Albany, MS	A FEW TREES WERE DOWN ACROSS TOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 11.2 hours before the alert went out and 74 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: 1313 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 793 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 252 m²/s²
0-3 km storm-relative helicity: 326 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 19.4

Open this sounding in Storm Lab

The text

As transmitted.

120 
WUUS54 KMEG 061109
SVRMEG
MSC071-093-115-145-061145-
/O.NEW.KMEG.SV.W.0199.211206T1109Z-211206T1145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
509 AM CST Mon Dec 6 2021

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Northeastern Lafayette County in northwestern Mississippi...
  Northern Pontotoc County in northeastern Mississippi...
  Union County in northeastern Mississippi...
  Southeastern Marshall County in northwestern Mississippi...

* Until 545 AM CST.

* At 509 AM CST, a severe thunderstorm was located near Etta, or 14
  miles west of New Albany, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  New Albany, Ecru, Cambridge, Keownville, New Harmony, Etta,
  Bethlehem, Pinedale, Sherman, Myrtle, Blue Springs, Shari,
  Hortontown, Keel, Poolville, Graham, Esperanza, Endville, Cherry
  Creek and Ellistown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3443 8954 3459 8938 3459 8930 3458 8930
      3459 8924 3460 8873 3426 8889
TIME...MOT...LOC 1109Z 272DEG 40KT 3448 8927 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

MJ

1 follow-up statement

679 
WWUS54 KMEG 061128
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
528 AM CST Mon Dec 6 2021

MSC071-093-061137-
/O.CAN.KMEG.SV.W.0199.000000T0000Z-211206T1145Z/
Lafayette MS-Marshall MS-
528 AM CST Mon Dec 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN LAFAYETTE AND
SOUTHEASTERN MARSHALL COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3450 8878 3449 8879 3447 8879 3432 8886
      3442 8925 3451 8925 3459 8911 3460 8873
TIME...MOT...LOC 1127Z 274DEG 37KT 3448 8900 

$$

MSC115-145-061145-
/O.CON.KMEG.SV.W.0199.000000T0000Z-211206T1145Z/
Pontotoc MS-Union MS-
528 AM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 AM CST
FOR NORTHEASTERN PONTOTOC AND UNION COUNTIES...

At 527 AM CST, a severe thunderstorm was located over New Albany,
moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
New Albany, Ecru, Keownville, New Harmony, Etta, Pinedale, Sherman,
Myrtle, Blue Springs, Shari, Poolville, Graham, Ellistown, Old
Myrtle, Pumpkin Center, Baker, Locum, Smalco, Glenfield and Union
Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3450 8878 3449 8879 3447 8879 3432 8886
      3442 8925 3451 8925 3459 8911 3460 8873
TIME...MOT...LOC 1127Z 274DEG 37KT 3448 8900 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 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.

Issued	Product	Office	Counties	Lasted
Dec 6, 4:45 AM CST	Special Weather Statement	MEG	Benton, Tippah	30 min
Dec 6, 4:58 AM CST	Special Weather Statement	MEG	Lafayette, Union	32 min
Dec 6, 5:11 AM CST	Special Weather Statement	MEG	Alcorn, Tippah	34 min
Dec 6, 5:15 AM CST	Special Weather Statement	MEG	Tallahatchie, Yalobusha	30 min
Dec 6, 5:35 AM CST	Severe Thunderstorm Warning	MEG	Itawamba, Lee, Pontotoc, Prentiss, Tippah, Tishomingo and 1 more	40 min
Dec 6, 5:47 AM CST	Special Weather Statement	MEG	Calhoun, Lee, Pontotoc	43 min
Dec 6, 6:15 AM CST	Special Weather Statement	MEG	Itawamba, Lee	30 min
Dec 6, 6:32 AM CST	Special Weather Statement	MEG	Calhoun, Chickasaw	28 min
Dec 6, 7:04 AM CST	Areal Flood Advisory	MEG	Calhoun, Chickasaw, Yalobusha	3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.