Alert archive / Arkansas / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 149

April 24, 200223 counties in Arkansas; Dunklin County, Pemiscot County, Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2002, 5:30 PM CDT for 23 counties in Arkansas; Dunklin County, Pemiscot County, Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2002, 5:30 PM CDT (22:30 UTC)
Expired
Apr 24, 2002, 10:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 25 counties

Baxter County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Cross County, AR, Faulkner County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Poinsett County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Pemiscot County, MO

The radar

The Little Rock radar (KLZK), 94 km from the middle of the area, began a volume at 22:33 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

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

IssuedProductOfficeCountiesLasted
Apr 24, 6:18 PM CDTSevere Thunderstorm WarningMEGDunklin27 min
Apr 24, 6:52 PM CDTSevere Thunderstorm WarningMEGDunklin23 min
Apr 24, 7:26 PM CDTSevere Thunderstorm WarningMEGCraighead, Poinsett34 min
Apr 24, 7:33 PM CDTSevere Thunderstorm WarningLZKJackson27 min
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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 10.5 hours before the alert went out and 205 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, Springfield, MO at 12:00Z on 2002-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1336 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, Springfield, MO at 12:00Z on 2002-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 464 square meters per square second.19395878Sfc1 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
1336 J/kg
Mixed-layer CIN
-146 J/kg
Mixed-layer LCL
872 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
464 m²/s²
0-3 km storm-relative helicity
421 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.0

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 242206
SEL9  
SPC WW 242202
ARZ000-MOZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 149
STORM PREDICTION CENTER NORMAN OK
502 PM CDT WED APR 24 2002

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

   NORTHERN ARKANSAS                           
   THE MISSOURI BOOTHEEL                           

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 530 PM UNTIL
1000 PM 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 90 STATUTE MILES
EAST AND WEST OF A LINE FROM 100 MILES SOUTHWEST OF WALNUT RIDGE
ARKANSAS TO 30 MILES NORTH NORTHWEST OF WALNUT RIDGE ARKANSAS.

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...  CONTINUE...WW 146...WW 147...WW 148...

DISCUSSION...ISOLATED SEVERE THUNDERSTORMS WILL LIKELY DEVELOP
ALONG AND AHEAD OF SURFACE COLD FRONT OVER NORTHERN AR.  VEERED LOW
LEVEL WINDS AND HIGH CAPE VALUES SUGGEST THAT LARGE HAIL AND
DAMAGING WINDS WILL BE THE MAIN THREAT.

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

363,0893 350,0903 350,0934 363,0924

WWUS20 KWNS 242206
SEL9  
SPC WW 242202
ARZ000-MOZ000-250300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 149
STORM PREDICTION CENTER NORMAN OK
502 PM CDT WED APR 24 2002

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

   NORTHERN ARKANSAS                           
   THE MISSOURI BOOTHEEL                           

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 530 PM UNTIL
1000 PM 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 90 STATUTE MILES
EAST AND WEST OF A LINE FROM 100 MILES SOUTHWEST OF WALNUT RIDGE
ARKANSAS TO 30 MILES NORTH NORTHWEST OF WALNUT RIDGE ARKANSAS.

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...  CONTINUE...WW 146...WW 147...WW 148...

DISCUSSION...ISOLATED SEVERE THUNDERSTORMS WILL LIKELY DEVELOP
ALONG AND AHEAD OF SURFACE COLD FRONT OVER NORTHERN AR.  VEERED LOW
LEVEL WINDS AND HIGH CAPE VALUES SUGGEST THAT LARGE HAIL AND
DAMAGING WINDS WILL BE THE MAIN THREAT.

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

363,0893 350,0903 350,0934 363,0924

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 24, 5:30 PM CDTSevere Thunderstorm WatchSPCGarland, Hempstead, Hot Spring, Howard, Little River, Montgomery and 8 more5 hr
Apr 24, 7:30 AM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Atchison, Buchanan, Caldwell, Carroll and 23 more6 hr
Apr 24, 10:15 AM CDTSevere Thunderstorm WatchSPCAdair, Audrain, Boone, Callaway, Chariton, Clark and 24 more5 hr
Apr 24, 2:30 PM CDTTornado WatchSPCBollinger, Butler, Callaway, Cape Girardeau, Carter, Crawford and 36 more6 hr

Nearby

Severe 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.