Alert archive / Arkansas / Tornado Watches in 2002

Tornado Watch 785

December 18, 200224 counties in Arkansas; 10 counties in Missouri

The Storm Prediction Center issued this tornado watch at Dec 18, 2002, 2:30 PM CST for 24 counties in Arkansas; 10 counties in Missouri. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Dec 18, 2002, 2:30 PM CST (20:30 UTC)
Expired
Dec 18, 2002, 9:00 PM CST
In force
7 hr
Issued by
the Storm Prediction Center
All 34 counties

Baxter County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden 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, Mississippi County, AR, Perry County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Butler County, MO, Carter County, MO, Dunklin County, MO, Howell County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Ripley County, MO, Stoddard County, MO

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Dec 18, 2:35 PM CSTSevere Thunderstorm WarningLZKPerry, Pulaski, Saline45 min
Dec 18, 3:06 PM CSTSevere Thunderstorm WarningLZKFaulkner39 min
Dec 18, 3:17 PM CSTSevere Thunderstorm WarningLZKPerry, Pulaski, Saline33 min
Dec 18, 3:21 PM CSTSevere Thunderstorm WarningLZKPerry, Pulaski, Saline29 min
Dec 18, 3:30 PM CSTTornado WarningLZKFaulkner30 min
Dec 18, 3:51 PM CSTTornado WarningLZKCleburne, White29 min
Dec 18, 4:09 PM CSTSevere Thunderstorm WarningLZKFaulkner61 min
Dec 18, 4:17 PM CSTTornado WarningLZKFaulkner, White43 min
Dec 18, 4:19 PM CSTSevere Thunderstorm WarningLZKFaulkner51 min
Dec 18, 4:27 PM CSTSevere Thunderstorm WarningLZKIndependence43 min
Dec 18, 4:49 PM CSTTornado WarningLZKIndependence, Jackson31 min
Dec 18, 5:02 PM CSTTornado WarningLZKLonoke, White43 min
Dec 18, 5:03 PM CSTTornado WarningLZKFaulkner47 min
Dec 18, 5:10 PM CSTSevere Thunderstorm WarningMEGClay, Craighead, Greene, Lawrence, Randolph65 min
Dec 18, 5:46 PM CSTTornado WarningLZKJackson, White, Woodruff39 min
Dec 18, 6:00 PM CSTTornado WarningMEGCross, Poinsett45 min
Dec 18, 6:14 PM CSTSevere Thunderstorm WarningMEGClay, Greene46 min
Dec 18, 6:45 PM CSTSevere Thunderstorm WarningLZKPrairie, White30 min
Dec 18, 6:59 PM CSTSevere Thunderstorm WarningMEGDunklin, Pemiscot46 min
Dec 18, 7:17 PM CSTSevere Thunderstorm WarningLZKPrairie, White, Woodruff43 min
Dec 18, 7:41 PM CSTSevere Thunderstorm WarningMEGCross49 min
Dec 18, 7:47 PM CSTSevere Thunderstorm WarningMEGSt. Francis43 min
Dec 18, 8:58 PM CSTSevere Thunderstorm WarningMEGCrittenden32 min

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 8.5 hours before the alert went out and 183 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 2002-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 30 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 2002-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 290 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
30 J/kg
Mixed-layer CIN
-209 J/kg
Mixed-layer LCL
597 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
290 m²/s²
0-3 km storm-relative helicity
365 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 182030
SEL5  
SPC WW 182030
ARZ000-MOZ000-190300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 785
STORM PREDICTION CENTER NORMAN OK
230 PM CST WED DEC 18 2002

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTH AND NORTHEAST ARKANSAS                           
SOUTHEAST MISSOURI                           

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL
900 PM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 95 MILES SOUTHWEST OF JONESBORO ARKANSAS TO 20 MILES
NORTH NORTHWEST OF POPLAR BLUFF MISSOURI.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...  CONTINUE...WW 783...WW 784...

DISCUSSION...THUNDERSTORMS WILL INCREASE IN COVERAGE/INTENSITY AND
SPREAD NEWD FROM AR TOWARD SE MO THE NEXT SEVERAL HOURS. 
DESTABILIZATION FROM THE S AND STRONG VERTICAL SHEAR WILL SUPPORT
SUPERCELLS WITH TORNADOES IN SEVERAL NE-SW ORIENTED BANDS...AS WELL
AS A THREAT OF LARGE HAIL AND DAMAGING WINDS.  AN ISOLATED STRONG
TORNADO COULD OCCUR LATER THIS AFTERNOON/EVENING ALONG AN AXIS FROM
LIT TO ARG.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 24045.


...THOMPSON

370,0890 345,0902 345,0931 370,0920

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 17, 7:35 PM CSTTornado WatchSPCBenton, Boone, Carroll, Madison, Marion, Newton and 1 more5 hr
Dec 17, 10:40 PM CSTTornado WatchSPCBenton, Carroll, Washington5 hr
Dec 18, 3:30 AM CSTTornado WatchSPCBenton5 hr
Dec 18, 7:20 AM CSTTornado WatchSPCBaxter, Boone, Carroll, Crawford, Franklin, Fulton and 12 more6 hr
Dec 18, 1:10 PM CSTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 26 more8 hr
Dec 18, 5:50 PM CSTTornado WatchSPCChicot, Crittenden, Desha, Lee, Mississippi, Phillips and 1 more3 hr
Dec 18, 2:15 AM CSTSevere Thunderstorm WatchSPCAdair, Bates, Buchanan, Caldwell, Carroll, Cass and 29 more6 hr
Dec 18, 9:30 AM CSTTornado WatchSPCAdair, Audrain, Barton, Benton, Boone, Callaway and 33 more6 hr
Dec 18, 4:35 PM CSTTornado WatchSPCCrawford, Dent, Franklin, Gasconade, Jefferson, Laclede and 14 more5 hr

Nearby

Tornado Watches in Arkansas, 2002Tornado Watches in Missouri, 2002Every tornado 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.