Alert archive / Tennessee / Mesoscale Discussions in 2023

Mesoscale Discussion 424

April 1, 20239 counties in Alabama; 9 counties in Mississippi; 24 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2023, 1:13 AM CDT for 9 counties in Alabama; 9 counties in Mississippi; 24 counties in Tennessee. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Apr 1, 2023, 1:13 AM CDT (06:13 UTC)
Expired
Apr 1, 2023, 2:45 AM CDT
In force
92 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 101
All 42 counties

Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Morgan County, AL, Winston County, AL, Calhoun County, MS, Chickasaw County, MS, Itawamba County, MS, Lee County, MS, Monroe County, MS, Pontotoc County, MS, Prentiss County, MS, Tishomingo County, MS, Union County, MS, Bedford County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Jackson County, TN, Lawrence County, TN, Lincoln County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Putnam County, TN, Rutherford County, TN, Smith County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Columbus AFB radar (KGWX), 125 km from the middle of the area, began a volume at 06:17 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 6.2 hours before the alert went out and 169 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 00:00Z on 2023-04-01Temperature 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 00:00Z on 2023-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 388 square meters per square second.1939587897Sfc1 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
1143 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
388 m²/s²
0-3 km storm-relative helicity
532 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 31, 11:20 PM CDTMesoscale DiscussionSPCColbert, Cullman, Franklin, Jackson, Lauderdale, Lawrence and 5 more115 min
Mar 31, 11:59 PM CDTTornado WatchSPCColbert, Cullman, DeKalb, Fayette, Franklin, Jackson and 10 more6 hr
Apr 1, 3:19 AM CDTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Cherokee, Chilton and 19 more5 hr
Apr 1, 3:46 AM CDTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Cullman, DeKalb, Etowah and 9 more89 min
Apr 1, 6:18 AM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Chilton, Clay and 14 more87 min
Apr 1, 11:55 AM CDTMesoscale DiscussionSPCDale, Henry, Houston2 hr
Apr 1, 12:47 PM CDTSevere Thunderstorm WatchSPCCoffee, Dale, Geneva, Henry, Houston6 hr
Apr 1, 3:04 PM CDTMesoscale DiscussionSPCHouston86 min
Mar 31, 7:42 PM CDTMesoscale DiscussionSPCAdams, Bolivar, Carroll, Claiborne, Coahoma, Grenada and 12 more2 hr
Mar 31, 8:24 PM CDTTornado WatchSPCAdams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 17 more8 hr
Mar 31, 10:23 PM CDTMesoscale DiscussionSPCBenton, Bolivar, Calhoun, Carroll, Chickasaw, Coahoma and 19 more2 hr
Apr 1, 2:03 AM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Claiborne, Clay, Copiah and 23 more87 min
Apr 1, 2:40 AM CDTTornado WatchSPCClarke, Clay, Jasper, Kemper, Lauderdale, Leake and 9 more4 hr
Mar 31, 8:49 PM CDTMesoscale DiscussionSPCChester, Hardeman, Henderson, McNairy116 min
Mar 31, 9:52 PM CDTMesoscale DiscussionSPCBenton, Carroll, Chester, Crockett, Decatur, Fayette and 16 more113 min
Apr 1, 1:49 AM CDTTornado WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 15 more4 hr

Nearby

Mesoscale Discussions in Tennessee, 2023Mesoscale Discussions in Alabama, 2023Mesoscale Discussions in Mississippi, 2023Every mesoscale discussion in 2023

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.