Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 221, NWS Memphis, TN

December 29, 2021Prentiss County, Tishomingo County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Dec 29, 2021, 4:58 PM CST for Prentiss County, Tishomingo 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
Dec 29, 2021, 4:58 PM CST (22:58 UTC)
Expired
Dec 29, 2021, 5:12 PM CST
In force
14 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Tornado
Possible
Damage threat
Considerable
Hail
0.75 in
Wind
70.0 mph

Counties Prentiss County, MS, Tishomingo County, MS

The radar

The Columbus AFB radar (KGWX), 107 km from the middle of the area, began a volume at 22:57 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 29, 12:05 PM CSTTornado WatchSPC7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.0 hours before the alert went out and 161 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 12:00Z on 2021-12-29Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2021-12-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939587897Sfc1 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
1900 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

166 
WUUS54 KMEG 292258
SVRMEG
MSC117-141-292330-
/O.NEW.KMEG.SV.W.0221.211229T2258Z-211229T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
458 PM CST Wed Dec 29 2021

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Central Tishomingo County in northeastern Mississippi...
  Northeastern Prentiss County in northeastern Mississippi...

* Until 530 PM CST.

* At 457 PM CST, severe thunderstorms were located along a line
  extending from near Walnut Grove to near Midway, moving east at 55
  mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Iuka, J P Coleman State Park, Burnsville, Midway, Paden, Bacon
  Springs, Oldham, Hazard Switch, Walker Siding, Holcut, Blythe
  Crossing and Holts Spur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 PM CST for northeastern
Mississippi...and western Tennessee.

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

A Tornado Watch remains in effect until 700 PM CST for northeastern
Mississippi...and western Tennessee.

&&

LAT...LON 3469 8812 3462 8842 3500 8825 3500 8820
      3496 8818 3492 8815 3490 8813 3489 8810
TIME...MOT...LOC 2257Z 249DEG 47KT 3499 8810 3476 8826 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$
1 follow-up statement
770 
WWUS54 KMEG 292312
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
512 PM CST Wed Dec 29 2021

MSC117-141-292321-
/O.CAN.KMEG.SV.W.0221.000000T0000Z-211229T2330Z/
Tishomingo MS-Prentiss MS-
512 PM CST Wed Dec 29 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL TISHOMINGO AND
NORTHEASTERN PRENTISS COUNTIES IS CANCELLED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been cancelled.  However heavy rain is still possible with these
thunderstorms.

A Tornado Watch remains in effect until 700 PM CST for northeastern
Mississippi...and western Tennessee.

LAT...LON 3469 8812 3462 8842 3500 8825 3500 8820
      3496 8818 3492 8815 3490 8813 3489 8810
TIME...MOT...LOC 2309Z 249DEG 47KT 3505 8791 3482 8807 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 28, 9:46 PM CSTAreal Flood AdvisoryMEGChickasaw, Itawamba, Monroe3 hr
Dec 28, 10:22 PM CSTSpecial Weather StatementMEGMonroe38 min
Dec 28, 10:37 PM CSTFlash Flood WarningMEGMonroe3 hr
Dec 29, 9:00 AM CSTAreal Flood AdvisoryMEGCalhoun, Chickasaw, Lee, Pontotoc, Yalobusha3 hr
Dec 29, 9:17 AM CSTFlash Flood WarningMEGCalhoun, Yalobusha3 hr
Dec 29, 12:14 PM CSTAreal Flood WarningMEGCalhoun, Chickasaw, Lee, Pontotoc, Yalobusha3 hr
Dec 29, 1:59 PM CSTSpecial Weather StatementMEGDeSoto31 min
Dec 29, 4:36 PM CSTSpecial Weather StatementMEGCalhoun24 min
Dec 29, 4:53 PM CSTSevere Thunderstorm Warning Considerable damage threatMEGCalhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc52 min
Dec 29, 5:02 PM CSTAreal Flood AdvisoryMEGPrentiss2 hr
Dec 29, 5:06 PM CSTTornado WarningMEGCalhoun, Chickasaw39 min
Dec 29, 5:29 PM CSTSevere Thunderstorm Warning Considerable damage threatMEGChickasaw, Itawamba, Monroe46 min
Dec 29, 5:42 PM CSTAreal Flood AdvisoryMEGCalhoun, Chickasaw, Itawamba, Lee, Monroe, Pontotoc3 hr
Dec 29, 5:53 PM CSTSevere Thunderstorm WarningMEGMonroe37 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.