Alert archive / Texas / Tornado Watches in 2002

Tornado Watch 57

March 30, 200224 counties in Texas

The Storm Prediction Center issued this tornado watch at Mar 30, 2002, 12:30 PM CST for 24 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 30, 2002, 12:30 PM CST (18:30 UTC)
Expired
Mar 30, 2002, 6:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 24 counties

Angelina County, TX, Brazos County, TX, Burleson County, TX, Falls County, TX, Grimes County, TX, Hardin County, TX, Houston County, TX, Jasper County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Madison County, TX, Milam County, TX, Montgomery County, TX, Polk County, TX, Robertson County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Washington County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 30, 1:13 PM CSTSevere Thunderstorm WarningFWDLimestone62 min
Mar 30, 1:18 PM CSTTornado WarningFWDLimestone42 min
Mar 30, 2:12 PM CSTSevere Thunderstorm WarningFWDRobertson63 min
Mar 30, 2:33 PM CSTSevere Thunderstorm WarningFWDLeon57 min
Mar 30, 5:11 PM CSTSevere Thunderstorm WarningHGXMontgomery34 min

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 6.5 hours before the alert went out and 245 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, Fort Worth, TX at 12:00Z on 2002-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 12:00Z on 2002-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 80 square meters per square second.193958Sfc1 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
17 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
976 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
80 m²/s²
0-3 km storm-relative helicity
148 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 301811
SEL7  
SPC WW 301807
TXZ000-310000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 57
STORM PREDICTION CENTER NORMAN OK
1207 PM CST SAT MAR 30 2002

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

CENTRAL AND EAST TEXAS                              

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
600 PM CST.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 50 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 50 MILES WEST NORTHWEST OF COLLEGE STATION
TEXAS TO 60 MILES EAST SOUTHEAST OF LUFKIN TEXAS.

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.

DISCUSSION...THUNDERSTORMS NOW ACROSS CENTRAL TX WILL INTENSIFY AND
MOVE NEWD...WHILE ADDITIONAL STORMS DEVELOP EWD DURING THE
AFTERNOON IN ADVANCE OF THE MID LEVEL LOW OVER W TX.  AN AREA OF
BACKED LOW-LEVEL WINDS BETWEEN ABOUT I-10 AND I-20 IS CO-LOCATED
WITH THE AXIS OF STRONGEST INSTABILITY AND GREATEST LOW-LEVEL DEW
POINTS...WHICH WILL SUPPORT A THREAT OF SUPERCELLS WITH LARGE
HAIL/DAMAGING WINDS AND A FEW TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 23035.


...THOMPSON

313,0970 313,0934 301,0934 300,0970

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 29, 7:30 PM CSTSevere Thunderstorm WatchSPCBorden, Coke, Crockett, Fisher, Glasscock, Howard and 7 more6 hr
Mar 29, 11:30 PM CSTSevere Thunderstorm WatchSPCBrown, Callahan, Coke, Coleman, Collin, Comanche and 25 more6 hr
Mar 30, 3:00 AM CSTSevere Thunderstorm WatchSPCAnderson, Bell, Bosque, Bowie, Camp, Collin and 39 more5 hr
Mar 30, 5:30 AM CSTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bexar, Brown, Callahan, Coke and 24 more6 hr
Mar 30, 1:00 PM CSTTornado WatchSPCAnderson, Bosque, Camp, Cherokee, Comanche, Dallas and 28 more5 hr
Mar 30, 3:45 PM CSTSevere Thunderstorm WatchSPCAransas, Austin, Brazoria, Calhoun, Colorado, Fort Bend and 8 more5 hr
Mar 30, 5:30 PM CSTTornado WatchSPCAnderson, Angelina, Cherokee, Gregg, Grimes, Hardin and 22 more6 hr

Nearby

Tornado Watches in Texas, 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.