Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Memphis, TN

April 9, 20214 counties in Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Apr 9, 2021, 7:41 PM CDT for 4 counties in Tennessee. It was in force for 17 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: Apr 9, 2021, 7:41 PM CDT (00:41 UTC)
Expired: Apr 9, 2021, 7:58 PM CDT
In force: 17 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Chester County, TN, Hardin County, TN, Henderson County, TN, McNairy County, TN

The radar

The Memphis radar (KNQA), 142 km from the middle of the area, began a volume at 00:40 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.

Issued	Product	Office	Lasted
Apr 9, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 0.7 hours before the alert went out and 162 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2032 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 326 m²/s²
0-3 km storm-relative helicity: 590 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

729 
WUUS54 KMEG 100041
SVRMEG
TNC023-071-077-109-100130-
/O.NEW.KMEG.SV.W.0091.210410T0041Z-210410T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
741 PM CDT Fri Apr 9 2021

The National Weather Service in Memphis has issued a

* Severe Thunderstorm Warning for...
  Southern Henderson County in western Tennessee...
  Northern McNairy County in western Tennessee...
  Northwestern Hardin County in western Tennessee...
  Chester County in western Tennessee...

* Until 830 PM CDT.

* At 740 PM CDT, a severe thunderstorm was located near Masseyville,
  or near Henderson, moving northeast at 20 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Lexington, Henderson, Adamsville, Sardis, Jacks Creek, Reagan,
  McNairy, Scotts Hill, Bethel Springs, Saltillo, Finger,
  Milledgeville, Enville, Forty Forks, Palestine, Hinkle, Hickory
  Corners, Roby, Five Forks and Montezuma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3538 8818 3522 8863 3537 8877 3568 8839
      3547 8824 3542 8825 3541 8822 3539 8820
      3538 8820 3539 8819
TIME...MOT...LOC 0040Z 230DEG 19KT 3535 8863 

HAIL...1.50IN
WIND...60MPH
 
$$

SJM

1 follow-up statement

456 
WWUS54 KMEG 100058
SVSMEG

Severe Weather Statement
National Weather Service Memphis TN
758 PM CDT Fri Apr 9 2021

TNC023-071-077-109-100108-
/O.CAN.KMEG.SV.W.0091.000000T0000Z-210410T0130Z/
Henderson TN-McNairy TN-Hardin TN-Chester TN-
758 PM CDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN HENDERSON...NORTHERN
MCNAIRY...NORTHWESTERN HARDIN AND CHESTER COUNTIES IS CANCELLED...
                
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 has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
western Tennessee.

LAT...LON 3538 8818 3522 8863 3537 8877 3568 8839
      3547 8824 3542 8825 3541 8822 3539 8820
      3538 8820 3539 8819
TIME...MOT...LOC 0056Z 230DEG 19KT 3540 8856 

$$

SJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 7:05 PM CDT	Severe Thunderstorm Warning	MEG	Chester, Hardeman, McNairy	40 min
Apr 9, 7:41 PM CDT	Areal Flood Advisory	MEG	Crockett, Haywood, Madison	2 hr
Apr 9, 8:01 PM CDT	Severe Thunderstorm Warning	MEG	Hardin, McNairy	44 min
Apr 9, 8:21 PM CDT	Areal Flood Advisory	MEG	Chester, Hardeman, McNairy	88 min
Apr 9, 8:38 PM CDT	Areal Flood Advisory	MEG	Hardin, McNairy	3 hr
Apr 9, 8:45 PM CDT	Severe Thunderstorm Warning	MEG	McNairy	17 min
Apr 9, 9:59 PM CDT	Special Weather Statement	MEG	Chester, McNairy	31 min
Apr 10, 12:38 PM CDT	River Flood Advisory	MEG	Dyer, Lake, Lauderdale	56 hr

Nearby

Severe Thunderstorm Warnings in Tennessee, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.