Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 178, NWS Memphis, TN

July 31, 20215 counties in Tennessee

NWS Memphis, TN issued this severe thunderstorm warning at Jul 31, 2021, 11:07 PM CDT for 5 counties in Tennessee. It was in force for 23 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: Jul 31, 2021, 11:07 PM CDT (04:07 UTC)
Expired: Jul 31, 2021, 11:30 PM CDT
In force: 23 min
Issued by: NWS Memphis, TN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Memphis radar (KNQA), 164 km from the middle of the area, began a volume at 04:07 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
Jul 31, 11:11 PM CDT	TSTM WND DMG	2 Nw Reagan, TN	TREES AND POWERLINES DOWN ON DYERS CHAPEL ROAD.

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

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.1 hours before the alert went out and 155 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: 1106 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1447 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

As transmitted.

458 
WUUS54 KMEG 010407
SVRMEG
TNC023-039-071-077-109-010430-
/O.NEW.KMEG.SV.W.0178.210801T0407Z-210801T0430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
1107 PM CDT Sat Jul 31 2021

The National Weather Service in Memphis has issued a

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

* Until 1130 PM CDT.

* At 1107 PM CDT, a severe thunderstorm was located near Sardis, or
  14 miles southeast of Lexington, moving southeast at 55 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Savannah, Adamsville, Sardis, Reagan, Jacks Creek, Olive Hill,
  Morris Chapel, Montgomery, Scotts Hill, Saltillo, Milledgeville,
  Enville, Right, Phillips, Haney, Hinkle, Roby, Pleasant Grove, Cabo
  and Middle Fork.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3539 8799 3539 8803 3537 8803 3537 8801
      3535 8800 3533 8802 3530 8802 3529 8798
      3514 8798 3537 8858 3562 8847 3550 8798
      3548 8799 3547 8803 3546 8804 3543 8803
      3541 8797
TIME...MOT...LOC 0407Z 295DEG 49KT 3548 8826 

HAIL...<.75IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 8:40 PM CDT	Special Weather Statement	MEG	Lake	35 min
Jul 31, 8:57 PM CDT	Severe Thunderstorm Warning	MEG	Lauderdale	48 min
Jul 31, 9:09 PM CDT	Special Weather Statement	MEG	Henry, Weakley	36 min
Jul 31, 9:26 PM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Haywood, Lauderdale	49 min
Jul 31, 9:44 PM CDT	Special Weather Statement	MEG	Lauderdale	31 min
Jul 31, 9:58 PM CDT	Special Weather Statement	MEG	Crockett	32 min
Jul 31, 10:05 PM CDT	Special Weather Statement	MEG	Gibson	25 min
Jul 31, 10:23 PM CDT	Areal Flood Advisory	MEG	Gibson, Madison	52 min
Jul 31, 10:25 PM CDT	Special Weather Statement	MEG	Carroll, Gibson	35 min
Jul 31, 10:31 PM CDT	Severe Thunderstorm Warning	MEG	Benton, Carroll, Decatur, Gibson, Henderson, Madison	44 min
Jul 31, 10:33 PM CDT	Special Weather Statement	MEG	Chester, Madison	27 min
Jul 31, 10:48 PM CDT	Tornado Warning	MEG	Benton, Carroll, Decatur, Henderson	42 min
Jul 31, 11:03 PM CDT	Special Weather Statement	MEG	Hardin	27 min
Jul 31, 11:05 PM CDT	Special Weather Statement	MEG	Dyer	25 min
Jul 31, 11:12 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	18 min
Jul 31, 11:29 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Henderson	16 min
Jul 31, 11:31 PM CDT	Special Weather Statement	MEG	Decatur	14 min
Aug 1, 4:42 AM CDT	Areal Flood Advisory	MEG	Hardin	2 hr
Aug 1, 8:33 AM CDT	Special Weather Statement	MEG	McNairy	57 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.