Alert archive / Mississippi / Tornado Warnings in 2021

Tornado Warning 49, NWS Memphis, TN

May 9, 20214 counties in Mississippi

NWS Memphis, TN issued this tornado warning at May 9, 2021, 6:42 PM CDT for 4 counties in Mississippi. It was in force for 21 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: May 9, 2021, 6:42 PM CDT (23:42 UTC)
Expired: May 9, 2021, 7:03 PM CDT
In force: 21 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

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

The radar

The Columbus AFB radar (KGWX), 104 km from the middle of the area, began a volume at 23:45 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
May 9, 7:05 PM CDT	TSTM WND DMG	1 Nne Etta, MS	DAMAGE TO ROOF AND CARPORT AT HOME ALONG HIGHWAY 30. NUMEROUS TREES DOWN.

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.

Issued	Product	Office	Lasted
May 9, 2:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 11.7 hours before the alert went out and 77 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: 203 J/kg
Mixed-layer CIN: -439 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 446 m²/s²
0-3 km storm-relative helicity: 571 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

791 
WFUS54 KMEG 092342
TORMEG
MSC071-093-115-145-100015-
/O.NEW.KMEG.TO.W.0049.210509T2342Z-210510T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Memphis TN
642 PM CDT Sun May 9 2021

The National Weather Service in Memphis has issued a

* Tornado Warning for...
  Northeastern Lafayette County in northwestern Mississippi...
  Southwestern Union County in northeastern Mississippi...
  Northwestern Pontotoc County in northeastern Mississippi...
  Southeastern Marshall County in northwestern Mississippi...

* Until 715 PM CDT.
    
* At 642 PM CDT, doppler radar indicated a severe thunderstorm
  producing a tornado was located over Cambridge, or 11 miles
  northeast of Oxford, moving southeast at 40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  New Albany, Pontotoc, Ecru, Cambridge, Pinedale, New Harmony, Etta,
  Thaxton, Algoma, Nixon, Hortontown, Keel, Poolville, Martintown,
  Wallerville, Esperanza, Cherry Creek, Ingomar, Burt and Bald Hill.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter or an interior room on the
lowest floor of a sturdy building. Avoid windows. If you are
outdoors, in a mobile home, or in a vehicle, move to the closest
substantial shelter and protect yourself from flying debris.

&&

LAT...LON 3443 8952 3459 8943 3443 8889 3418 8903
TIME...MOT...LOC 2342Z 295DEG 36KT 3448 8940 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

SGW

1 follow-up statement

225 
WWUS54 KMEG 100003
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
703 PM CDT Sun May 9 2021

MSC071-093-115-145-100013-
/O.CAN.KMEG.TO.W.0049.000000T0000Z-210510T0015Z/
Lafayette MS-Union MS-Pontotoc MS-Marshall MS-
703 PM CDT Sun May 9 2021

...THE TORNADO WARNING FOR NORTHEASTERN LAFAYETTE...SOUTHWESTERN
UNION...NORTHWESTERN PONTOTOC AND SOUTHEASTERN MARSHALL COUNTIES IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
northeastern and northwestern Mississippi.

LAT...LON 3443 8952 3459 8943 3443 8889 3418 8903
TIME...MOT...LOC 0001Z 295DEG 36KT 3439 8917 

$$

SGW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 8:42 PM CDT	River Flood Warning	MEG	Monroe	36 hr
May 8, 8:42 PM CDT	River Flood Warning	MEG	Monroe	36 hr
May 9, 9:48 AM CDT	Special Weather Statement	MEG	Tate	27 min
May 9, 10:14 AM CDT	Special Weather Statement	MEG	Panola	31 min
May 9, 11:24 AM CDT	Special Weather Statement	MEG	Union	36 min
May 9, 4:50 PM CDT	Severe Thunderstorm Warning	MEG	Tunica	40 min
May 9, 5:21 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Tate, Tunica	24 min
May 9, 5:39 PM CDT	Severe Thunderstorm Warning	MEG	DeSoto, Panola, Quitman, Tate, Tunica	36 min
May 9, 6:01 PM CDT	Severe Thunderstorm Warning	MEG	Lafayette, Marshall, Panola, Tate	44 min
May 9, 6:31 PM CDT	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Marshall, Pontotoc, Union	44 min

Nearby

Tornado Warnings in Mississippi, 2021 Every tornado warning in 2021 Tornadoes 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.