Alert archive / Tennessee / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 18, NWS Memphis, TN
NWS Memphis, TN issued this severe thunderstorm warning at Mar 17, 2021, 1:58 PM CDT for 5 counties in Tennessee. It was in force for 47 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
- Mar 17, 2021, 1:58 PM CDT (18:58 UTC)
- Expired
- Mar 17, 2021, 2:45 PM CDT
- In force
- 47 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, Hardeman County, TN, Henderson County, TN, Madison County, TN
The radar
The Memphis radar (KNQA), 137 km from the middle of the area, began a volume at 19:01 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 |
|---|---|---|---|
| Mar 17, 12:59 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Little Rock, AR (KLZK), launched 12:00Z, 7.0 hours before the alert went out and 160 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.
- Mixed-layer CAPE
- 18 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1466 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 217 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
738
WUUS54 KMEG 171858
SVRMEG
TNC023-039-069-077-113-171945-
/O.NEW.KMEG.SV.W.0018.210317T1858Z-210317T1945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Memphis TN
158 PM CDT Wed Mar 17 2021
The National Weather Service in Memphis has issued a
* Severe Thunderstorm Warning for...
Henderson County in western Tennessee...
Northeastern Hardeman County in western Tennessee...
Madison County in western Tennessee...
Chester County in western Tennessee...
Western Decatur County in western Tennessee...
* Until 245 PM CDT.
* At 158 PM CDT, a severe thunderstorm was located near Bemis, or 7
miles south of Jackson, moving east at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Jackson, Lexington, Henderson, Natchez Trace State Park, Natchez
Trace State Forest, Chickasaw State Forest, Chickasaw State Park,
Parsons, Decaturville, Sardis, Reagan, Blue Goose, Mifflin,
Bargerton, Wildersville, Bemis, Jacks Creek, Darden, Parkers
Crossroads and Montgomery.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 PM CDT for western
Tennessee.
A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted, act quickly and move to a
place of safety inside a sturdy structure such as a storm shelter or
small interior room.
&&
LAT...LON 3540 8821 3541 8823 3542 8823 3542 8836
3541 8836 3541 8835 3540 8836 3536 8893
3574 8894 3580 8814 3541 8812
TIME...MOT...LOC 1858Z 262DEG 48KT 3554 8880
HAIL...<.75IN
WIND...60MPH
$$The office that day
Everything else NWS Memphis, TN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 6:49 AM CDT | Severe Thunderstorm Warning | MEG | Fayette | 14 min |
| Mar 17, 9:04 AM CDT | Flash Flood Warning | MEG | Fayette, Hardeman, McNairy | 3 hr |
| Mar 17, 11:38 AM CDT | Flash Flood Warning | MEG | Shelby, Tipton | 3 hr |
| Mar 17, 12:24 PM CDT | Special Weather Statement | MEG | Shelby | 36 min |
| Mar 17, 12:31 PM CDT | Special Weather Statement | MEG | Tipton | 29 min |
| Mar 17, 1:18 PM CDT | Severe Thunderstorm Warning | MEG | Chester, Fayette, Hardeman, Haywood, Madison, Tipton | 42 min |
| Mar 17, 1:54 PM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Mar 17, 5:26 PM CDT | River Flood Warning | MEG | Crockett, Dyer, Lauderdale | 15 hr |
Nearby
Severe Thunderstorm Warnings in Tennessee, 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.