Alert archive / Tennessee / Tornado Watches in 2020

Tornado Watch 61

March 24, 202014 counties in Alabama; 15 counties in Mississippi; 31 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Mar 24, 2020, 3:06 PM CDT for 14 counties in Alabama; 15 counties in Mississippi; 31 counties in Tennessee. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Mar 24, 2020, 3:06 PM CDT (20:06 UTC)
Expired
Mar 24, 2020, 9:54 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 60 counties

Colbert County, AL, Cullman County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lamar County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Bedford County, TN, Bledsoe County, TN, Cannon County, TN, Chester County, TN, Coffee County, TN, Cumberland County, TN, Decatur County, TN, DeKalb County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Hickman County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Moore County, TN, Perry County, TN, Rutherford County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN

The radar

The Northeast Alabama radar (KHTX), 79 km from the middle of the area, began a volume at 20:09 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
70%
One or more EF2 to EF5 tornadoes
40%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 24, 4:57 PM CDTSevere Thunderstorm WarningOHXLawrence, Lewis, Wayne33 min
Mar 24, 5:15 PM CDTSevere Thunderstorm WarningMEGPrentiss, Tishomingo29 min
Mar 24, 5:22 PM CDTTornado WarningMEGPrentiss, Tishomingo23 min
Mar 24, 5:25 PM CDTSevere Thunderstorm WarningHUNColbert, Lauderdale35 min
Mar 24, 5:27 PM CDTTornado WarningOHXGiles, Lawrence33 min
Mar 24, 5:34 PM CDTTornado Warning Considerable damage threatHUNColbert26 min
Mar 24, 5:43 PM CDTTornado Warning EmergencyTornado observedCatastrophic damage threatHUNColbert32 min
Mar 24, 5:51 PM CDTSevere Thunderstorm WarningMEGItawamba, Lee, Prentiss, Tishomingo39 min
Mar 24, 5:52 PM CDTFlash Flood WarningOHXGiles, Lawrence, Marshall, Maury83 min
Mar 24, 5:56 PM CDTSevere Thunderstorm WarningMEGPrentiss, Tishomingo34 min
Mar 24, 6:00 PM CDTSevere Thunderstorm WarningOHXGiles, Marshall30 min
Mar 24, 6:03 PM CDTTornado WarningHUNColbert, Lawrence42 min
Mar 24, 6:07 PM CDTSevere Thunderstorm WarningHUNColbert, Franklin38 min
Mar 24, 6:22 PM CDTTornado WarningHUNFranklin9 min
Mar 24, 6:24 PM CDTSevere Thunderstorm WarningHUNFranklin51 min
Mar 24, 6:28 PM CDTSevere Thunderstorm WarningMEGItawamba17 min
Mar 24, 6:29 PM CDTTornado WarningHUNFranklin31 min
Mar 24, 6:34 PM CDTTornado WarningHUNLawrence, Limestone, Morgan26 min
Mar 24, 6:38 PM CDTSevere Thunderstorm WarningBMXMarion52 min
Mar 24, 6:45 PM CDTTornado WarningHUNFranklin, Moore45 min
Mar 24, 6:55 PM CDTTornado WarningHUNLawrence, Limestone, Morgan35 min
Mar 24, 6:59 PM CDTTornado WarningBMXMarion, Winston46 min
Mar 24, 7:08 PM CDTTornado WarningHUNFranklin17 min
Mar 24, 7:09 PM CDTSevere Thunderstorm WarningHUNFranklin36 min
Mar 24, 7:11 PM CDTTornado WarningMRXMarion34 min
Mar 24, 7:18 PM CDTTornado WarningOHXGrundy27 min
Mar 24, 7:19 PM CDTTornado WarningHUNLimestone, Madison, Marshall, Morgan41 min
Mar 24, 7:28 PM CDTSevere Thunderstorm WarningHUNJackson, Madison47 min
Mar 24, 7:43 PM CDTTornado WarningMRXMarion, Sequatchie20 min
Mar 24, 7:57 PM CDTTornado WarningHUNDeKalb, Jackson, Marshall48 min
Mar 24, 8:32 PM CDTTornado WarningHUNDeKalb24 min
Mar 24, 8:39 PM CDTTornado WarningHUNDeKalb12 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 8.1 hours before the alert went out and 116 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, Nashville Metro, TN at 12:00Z on 2020-03-24Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2020-03-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 square meters per square second.1939587897117136156Sfc1 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
862 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 24, 2:34 PM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Marion116 min
Mar 24, 5:35 PM CDTMesoscale DiscussionSPCColbert, Lauderdale, Limestone, Madison85 min
Mar 24, 11:27 AM CDTMesoscale DiscussionSPCAlcorn, DeSoto2 hr

Nearby

Tornado Watches in Tennessee, 2020Tornado Watches in Mississippi, 2020Tornado Watches in Alabama, 2020Every tornado watch in 2020

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.