Alert archive / Tennessee / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 188

April 30, 20026 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 30, 2002, 10:00 AM CDT for 6 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 30, 2002, 10:00 AM CDT (15:00 UTC)
Expired
Apr 30, 2002, 3:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 65 counties

Blount County, AL, Calhoun County, AL, Cherokee County, AL, Clay County, AL, Cleburne County, AL, Colbert County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Franklin County, AL, Jackson County, AL, Jefferson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, St. Clair County, AL, Talladega County, AL, Walker County, AL, Winston County, AL, Mississippi County, AR, Dade County, GA, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, DeSoto County, MS, Itawamba County, MS, Lee County, MS, Marshall County, MS, Prentiss County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Madison County, TN, Marion County, TN, Marshall County, TN, McNairy County, TN, Moore County, TN, Perry County, TN, Shelby County, TN, Tipton County, TN, Wayne County, TN

The radar

The Memphis radar (KNQA), 138 km from the middle of the area, began a volume at 15:02 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 30, 10:04 AM CDTSevere Thunderstorm WarningBMXBlount56 min
Apr 30, 10:20 AM CDTSevere Thunderstorm WarningBMXMorgan40 min
Apr 30, 10:27 AM CDTSevere Thunderstorm WarningBMXWalker33 min
Apr 30, 10:30 AM CDTSevere Thunderstorm WarningBMXTalladega45 min
Apr 30, 10:38 AM CDTSevere Thunderstorm WarningBMXClay52 min
Apr 30, 11:25 AM CDTSevere Thunderstorm WarningMEGPanola, Tate20 min
Apr 30, 11:46 AM CDTSevere Thunderstorm WarningMEGPontotoc, Union29 min
Apr 30, 12:13 PM CDTSevere Thunderstorm WarningMEGDunklin32 min
Apr 30, 12:21 PM CDTSevere Thunderstorm WarningMEGLee, Pontotoc24 min
Apr 30, 12:47 PM CDTSevere Thunderstorm WarningMEGLee, Monroe28 min
Apr 30, 12:54 PM CDTSevere Thunderstorm WarningMEGMississippi, Poinsett36 min
Apr 30, 1:25 PM CDTSevere Thunderstorm WarningBMXBlount, St. Clair50 min
Apr 30, 1:29 PM CDTSevere Thunderstorm WarningMEGFayette, Shelby, Tipton46 min
Apr 30, 2:08 PM CDTSevere Thunderstorm WarningMEGDeSoto, Marshall22 min
Apr 30, 2:16 PM CDTSevere Thunderstorm WarningMEGFayette, Shelby29 min
Apr 30, 2:20 PM CDTFlash Flood WarningMEGShelby115 min
Apr 30, 2:26 PM CDTSevere Thunderstorm WarningMEGBenton, Marshall, Tippah49 min

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 3.0 hours before the alert went out and 151 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, Little Rock, AR at 12:00Z on 2002-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 956 joules per kilogram.LCLLFCEL10008507005003002001001 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, Little Rock, AR at 12:00Z on 2002-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 278 square meters per square second.1939587897117Sfc1 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
956 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
700 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
278 m²/s²
0-3 km storm-relative helicity
335 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 2:00 PM CDTSevere Thunderstorm WatchSPCAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 31 more6 hr
Apr 30, 5:30 PM CDTSevere Thunderstorm WatchSPCHenry, Houston5 hr
Apr 30, 9:30 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Carroll, Clay, Craighead, Crittenden and 12 more6 hr
Apr 30, 3:00 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dent, Douglas and 18 more5 hr

Nearby

Severe Thunderstorm Watches in Tennessee, 2002Severe Thunderstorm Watches in Alabama, 2002Severe Thunderstorm Watches in Mississippi, 2002Every severe thunderstorm watch in 2002

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.