Alert archive / Tennessee / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 152

April 24, 200210 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; 14 counties in Tennessee

The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2002, 7:45 PM CDT for 10 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; 14 counties in Tennessee. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2002, 7:45 PM CDT (00:45 UTC)
Expired
Apr 25, 2002, 12:00 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 26 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Jackson County, AR, Mississippi County, AR, Poinsett County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO, Carroll County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 53 km from the middle of the area, began a volume at 00:49 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

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

IssuedProductOfficeCountiesLasted
Apr 24, 7:48 PM CDTTornado WarningMEGPemiscot27 min
Apr 24, 8:00 PM CDTSevere Thunderstorm WarningLZKWhite30 min
Apr 24, 8:00 PM CDTSevere Thunderstorm WarningMEGPoinsett45 min
Apr 24, 8:16 PM CDTTornado WarningMEGDyer29 min
Apr 24, 8:31 PM CDTSevere Thunderstorm WarningMEGCarroll29 min
Apr 24, 8:38 PM CDTSevere Thunderstorm WarningMEGCrockett, Gibson, Madison37 min
Apr 24, 8:42 PM CDTSevere Thunderstorm WarningMEGCrockett, Gibson, Madison33 min
Apr 24, 8:49 PM CDTSevere Thunderstorm WarningMEGCrittenden56 min
Apr 24, 8:57 PM CDTSevere Thunderstorm WarningMEGCrittenden48 min
Apr 24, 9:11 PM CDTSevere Thunderstorm WarningMEGCarroll, Haywood, Henderson, Madison49 min

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 0.8 hours before the alert went out and 97 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 00:00Z on 2002-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1586 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 00:00Z on 2002-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
1586 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1113 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 250031
SEL2  
SPC WW 250028
ARZ000-MOZ000-TNZ000-250500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 152
STORM PREDICTION CENTER NORMAN OK
728 PM CDT WED APR 24 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHEAST ARKANSAS                           
   MISSOURI BOOTHEEL                           
   WEST TENNESSEE                          

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM
UNTIL MIDNIGHT CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES WEST OF MEMPHIS TENNESSEE TO
40 MILES NORTH NORTHEAST OF DYERSBURG TENNESSEE.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 149.  WATCH NUMBER 149 WILL NOT BE
IN EFFECT AFTER 745 PM CDT.  CONTINUE...WW 147...WW 148...WW
150...WW 151...

DISCUSSION...SCATTERED STRONG/SEVERE STORMS WILL CONTINUE TO TRACK
EAST-SOUTHEASTWARD INTO WEST TN DURING THE NEXT FEW HOURS.  VERY
UNSTABLE AIRMASS /MLCAPE VALUES AROUND 3000 J/KG/ WILL MAINTAIN THE
RISK OF LARGE HAIL AND DAMAGING WINDS IN STRONGER CELLS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 28030.

...HART

363,0874 350,0892 350,0920 363,0902

WWUS20 KWNS 250031
SEL2  
SPC WW 250028
ARZ000-MOZ000-TNZ000-250500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 152
STORM PREDICTION CENTER NORMAN OK
728 PM CDT WED APR 24 2002

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHEAST ARKANSAS                           
   MISSOURI BOOTHEEL                           
   WEST TENNESSEE                          

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 745 PM
UNTIL MIDNIGHT CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES
EAST AND WEST OF A LINE FROM 40 MILES WEST OF MEMPHIS TENNESSEE TO
40 MILES NORTH NORTHEAST OF DYERSBURG TENNESSEE.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.  SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.

OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 149.  WATCH NUMBER 149 WILL NOT BE
IN EFFECT AFTER 745 PM CDT.  CONTINUE...WW 147...WW 148...WW
150...WW 151...

DISCUSSION...SCATTERED STRONG/SEVERE STORMS WILL CONTINUE TO TRACK
EAST-SOUTHEASTWARD INTO WEST TN DURING THE NEXT FEW HOURS.  VERY
UNSTABLE AIRMASS /MLCAPE VALUES AROUND 3000 J/KG/ WILL MAINTAIN THE
RISK OF LARGE HAIL AND DAMAGING WINDS IN STRONGER CELLS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 28030.

...HART

363,0874 350,0892 350,0920 363,0902

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 9:00 PM CDTSevere Thunderstorm WatchSPCBedford, Cannon, Chester, Decatur, Giles, Hardeman and 13 more5 hr

Nearby

Severe Thunderstorm Watches in Tennessee, 2002Severe Thunderstorm Watches in Arkansas, 2002Severe Thunderstorm Watches in Missouri, 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.