Alert archive / Texas / Tornado Watches in 2002

Tornado Watch 97

April 16, 200215 counties in Oklahoma; 42 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 16, 2002, 4:45 PM CDT for 15 counties in Oklahoma; 42 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 16, 2002, 4:45 PM CDT (21:45 UTC)
Expired
Apr 16, 2002, 11:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 57 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Bell County, TX, Bosque County, TX, Brown County, TX, Clay County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Fannin County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, Limestone County, TX, McCulloch County, TX, McLennan County, TX, Mills County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Robertson County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wichita County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 62 km from the middle of the area, began a volume at 21:48 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

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

IssuedProductOfficeCountiesLasted
Apr 16, 4:45 PM CDTSevere Thunderstorm WarningFWDJohnson60 min
Apr 16, 4:53 PM CDTSevere Thunderstorm WarningFWDJohnson52 min
Apr 16, 4:58 PM CDTTornado WarningFWDBosque47 min
Apr 16, 5:15 PM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Wichita, Wilbarger45 min
Apr 16, 5:25 PM CDTSevere Thunderstorm WarningFWDDenton, Wise50 min
Apr 16, 5:30 PM CDTSevere Thunderstorm WarningFWDHill45 min
Apr 16, 5:31 PM CDTTornado WarningFWDTarrant29 min
Apr 16, 5:47 PM CDTSevere Thunderstorm WarningFWDJohnson58 min
Apr 16, 5:54 PM CDTTornado WarningFWDHill, Johnson51 min
Apr 16, 5:56 PM CDTTornado WarningFWDTarrant34 min
Apr 16, 6:00 PM CDTSevere Thunderstorm WarningOUNArcher, Wichita45 min
Apr 16, 6:03 PM CDTSevere Thunderstorm WarningFWDCollin42 min
Apr 16, 6:13 PM CDTSevere Thunderstorm WarningOUNBryan32 min
Apr 16, 6:24 PM CDTTornado WarningFWDDallas51 min
Apr 16, 6:30 PM CDTSevere Thunderstorm WarningOUNLove30 min
Apr 16, 6:30 PM CDTSevere Thunderstorm WarningFWDTarrant45 min
Apr 16, 6:37 PM CDTSevere Thunderstorm WarningOUNAtoka38 min
Apr 16, 6:37 PM CDTSevere Thunderstorm WarningFWDEllis, Johnson53 min
Apr 16, 6:40 PM CDTSevere Thunderstorm WarningOUNClay, Wichita50 min
Apr 16, 6:50 PM CDTSevere Thunderstorm WarningOUNLove, Marshall40 min
Apr 16, 6:59 PM CDTSevere Thunderstorm WarningOUNJohnston, Murray46 min
Apr 16, 6:59 PM CDTTornado WarningFWDJohnson31 min
Apr 16, 7:04 PM CDTSevere Thunderstorm WarningFWDWise41 min
Apr 16, 7:08 PM CDTSevere Thunderstorm WarningFWDHunt52 min
Apr 16, 7:15 PM CDTSevere Thunderstorm WarningFWDDallas45 min
Apr 16, 7:16 PM CDTSevere Thunderstorm WarningOUNCarter44 min
Apr 16, 7:17 PM CDTSevere Thunderstorm WarningOUNAtoka, Coal43 min
Apr 16, 7:19 PM CDTTornado WarningFWDEllis41 min
Apr 16, 7:22 PM CDTSevere Thunderstorm WarningOUNJefferson38 min
Apr 16, 7:36 PM CDTTornado WarningOUNAtoka, Coal, Johnston24 min
Apr 16, 7:40 PM CDTTornado WarningOUNAtoka, Coal, Johnston20 min
Apr 16, 7:41 PM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Murray49 min
Apr 16, 7:43 PM CDTSevere Thunderstorm WarningFWDCooke, Montague62 min
Apr 16, 8:01 PM CDTSevere Thunderstorm WarningFWDHunt44 min
Apr 16, 8:01 PM CDTTornado WarningFWDEllis44 min
Apr 16, 8:06 PM CDTTornado WarningOUNAtoka24 min
Apr 16, 8:07 PM CDTSevere Thunderstorm WarningOUNCoal38 min
Apr 16, 8:30 PM CDTTornado WarningOUNAtoka45 min
Apr 16, 8:34 PM CDTSevere Thunderstorm WarningFWDBosque56 min
Apr 16, 8:44 PM CDTSevere Thunderstorm WarningFWDEllis61 min
Apr 16, 8:46 PM CDTSevere Thunderstorm WarningFWDCooke59 min
Apr 16, 8:54 PM CDTFlash Flood WarningFWDEllis3 hr
Apr 16, 8:59 PM CDTSevere Thunderstorm WarningFWDKaufman46 min
Apr 16, 9:13 PM CDTSevere Thunderstorm WarningFWDDallas47 min
Apr 16, 9:16 PM CDTTornado WarningOUNAtoka29 min
Apr 16, 9:26 PM CDTSevere Thunderstorm WarningFWDGrayson64 min

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 9.8 hours before the alert went out and 70 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 2002-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1027 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 2002-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
1027 J/kg
Mixed-layer CIN
-236 J/kg
Mixed-layer LCL
707 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
58 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 162147
SEL7  
SPC WW 162142
OKZ000-TXZ000-170400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 97
STORM PREDICTION CENTER NORMAN OK
442 PM CDT TUE APR 16 2002

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

   SOUTHERN OKLAHOMA                           
   CENTRAL AND NORTH TEXAS                              

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 445 PM UNTIL 1100
PM CDT.

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 90 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES WEST SOUTHWEST OF TEMPLE TEXAS TO 45 MILES
NORTH NORTHWEST OF ARDMORE OKLAHOMA.

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 96...

DISCUSSION...WARM ADVECTION ON WRN EDGE OF SHALLOW COLD BUBBLE LEFT
BEHIND BY RAINFALL ASSOCIATED WITH UPPER TROUGH NOW ENTERING AR
EXPECTED TO SUPPORT THUNDERSTORM DEVELOPMENT THROUGH THE EVENING
OVER PARTS OF TX/OK.  ABSENCE OF STRONG LINEAR FORCING...MOIST
BOUNDARY LAYER CONDITIONS AND MODERATE LOW LEVEL VEERING EXPECTED
TO BE FAVORABLE FOR DISCRETE SUPERCELLS WITH LARGE HAIL AND
POSSIBLE 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 24035.

...CORFIDI

345,0954 305,0962 305,0992 345,0985

WWUS20 KWNS 162147
SEL7  
SPC WW 162142
OKZ000-TXZ000-170400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 97
STORM PREDICTION CENTER NORMAN OK
442 PM CDT TUE APR 16 2002

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

   SOUTHERN OKLAHOMA                           
   CENTRAL AND NORTH TEXAS                              

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 445 PM UNTIL 1100
PM CDT.

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 90 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES WEST SOUTHWEST OF TEMPLE TEXAS TO 45 MILES
NORTH NORTHWEST OF ARDMORE OKLAHOMA.

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 96...

DISCUSSION...WARM ADVECTION ON WRN EDGE OF SHALLOW COLD BUBBLE LEFT
BEHIND BY RAINFALL ASSOCIATED WITH UPPER TROUGH NOW ENTERING AR
EXPECTED TO SUPPORT THUNDERSTORM DEVELOPMENT THROUGH THE EVENING
OVER PARTS OF TX/OK.  ABSENCE OF STRONG LINEAR FORCING...MOIST
BOUNDARY LAYER CONDITIONS AND MODERATE LOW LEVEL VEERING EXPECTED
TO BE FAVORABLE FOR DISCRETE SUPERCELLS WITH LARGE HAIL AND
POSSIBLE 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 24035.

...CORFIDI

345,0954 305,0962 305,0992 345,0985

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 16, 5:00 PM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 14 more6 hr

Nearby

Tornado Watches in Texas, 2002Tornado Watches in Oklahoma, 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; radar from the NEXRAD Level II archive.