Alert archive / Texas / Tornado Watches in 2003
Tornado Watch 149
The Storm Prediction Center issued this tornado watch at Apr 23, 2003, 4:00 PM CDT for 9 counties in Oklahoma; 31 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2003, 4:00 PM CDT (21:00 UTC)
- Expired
- Apr 23, 2003, 10:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Bosque County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton 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, McLennan County, TX, Mills County, TX, Montague County, TX, Navarro County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 29 km from the middle of the area, began a volume at 21:00 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
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 4:54 PM CDT | Severe Thunderstorm Warning | FWD | Comanche, Eastland | 51 min |
| Apr 23, 5:00 PM CDT | Severe Thunderstorm Warning | FWD | Palo Pinto, Stephens | 60 min |
| Apr 23, 5:44 PM CDT | Severe Thunderstorm Warning | FWD | Comanche | 61 min |
| Apr 23, 5:45 PM CDT | Severe Thunderstorm Warning | FWD | Comanche | 60 min |
| Apr 23, 6:13 PM CDT | Severe Thunderstorm Warning | FWD | Erath | 62 min |
| Apr 23, 7:01 PM CDT | Severe Thunderstorm Warning | FWD | Comanche | 59 min |
| Apr 23, 7:06 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 24 min |
| Apr 23, 7:14 PM CDT | Severe Thunderstorm Warning | FWD | Erath, Hood, Somervell | 61 min |
| Apr 23, 7:57 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Jefferson | 48 min |
| Apr 23, 7:57 PM CDT | Severe Thunderstorm Warning | FWD | Johnson | 63 min |
| Apr 23, 8:13 PM CDT | Severe Thunderstorm Warning | FWD | Erath, Hood, Somervell | 62 min |
| Apr 23, 8:16 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 44 min |
| Apr 23, 8:27 PM CDT | Tornado Warning | OUN | Jefferson, Stephens | 33 min |
| Apr 23, 8:46 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, McClain, Murray, Pontotoc, Seminole | 44 min |
| Apr 23, 8:53 PM CDT | Tornado Warning | OUN | Carter | 27 min |
| Apr 23, 8:57 PM CDT | Severe Thunderstorm Warning | FWD | Ellis, Johnson | 63 min |
| Apr 23, 8:59 PM CDT | Severe Thunderstorm Warning | OUN | Stephens | 46 min |
| Apr 23, 9:08 PM CDT | Tornado Warning | OUN | Murray | 37 min |
| Apr 23, 9:10 PM CDT | Flash Flood Warning | FWD | Johnson | 3 hr |
| Apr 23, 9:12 PM CDT | Severe Thunderstorm Warning | FWD | Bosque, Hill | 63 min |
| Apr 23, 9:27 PM CDT | Tornado Warning | FWD | Ellis | 48 min |
| Apr 23, 9:49 PM CDT | Severe Thunderstorm Warning | FWD | Ellis, Henderson, Kaufman, Navarro | 56 min |
| Apr 23, 9:55 PM CDT | Severe Thunderstorm Warning | FWD | Dallas | 35 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 9.0 hours before the alert went out and 46 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.
- Mixed-layer CAPE
- 245 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 486 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 232100
SEL9
SPC WW 232100
OKZ000-TXZ000-240300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 149
NWS STORM PREDICTION CENTER NORMAN OK
400 PM CDT WED APR 23 2003
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTH CENTRAL OKLAHOMA
NORTH CENTRAL TEXAS
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL
1000 PM CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 65 STATUTE MILES EAST AND WEST
OF A LINE FROM 25 MILES NORTHEAST OF ARDMORE OKLAHOMA TO 25 MILES
WEST OF TEMPLE 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.
OTHER WATCH INFORMATION...CONTINUE...WW 146...WW 147...WW 148...
DISCUSSION...BROKEN PRE-FRONTAL BAND OF SEVERE STORMS...INCLUDING
SUPERCELLS...CONTINUES TO DEVELOP EWD FROM NW TX TOWARD N CENTRAL
TX. THE SURFACE WARM FRONT WILL MOVE SLOWLY NWD TOWARD THE RED
RIVER/SRN OK THE NEXT FEW HOURS AS THE LOW LEVELS DESTABILIZE ACROSS
N TX. STRONG LOW-LEVEL SHEAR AND LOW LCL HEIGHTS WILL SUPPORT A
THREAT OF SUPERCELLS WITH TORNADOES THROUGH THE EVENING HOURS.
AVIATION...TORDADOES AND 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 26030.
...THOMPSON
343,0953 310,0964 310,0985 343,0975SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 2:58 AM CDT | Mesoscale Discussion | SPC | Harmon | 2 hr |
| Apr 23, 9:55 AM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 17 more | 65 min |
| Apr 23, 10:30 AM CDT | Mesoscale Discussion | SPC | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 4 more | 90 min |
| Apr 23, 11:50 AM CDT | Tornado Watch | SPC | Comanche, Cotton, Harmon, Jackson, Tillman | 6 hr |
| Apr 23, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 15 more | 6 hr |
| Apr 23, 1:26 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Harmon, Jackson, Tillman | 94 min |
| Apr 23, 2:44 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 15 more | 91 min |
| Apr 23, 3:08 PM CDT | Mesoscale Discussion | SPC | Carter, Comanche, Cotton, Garvin, Jackson, Jefferson and 5 more | 97 min |
| Apr 23, 5:36 PM CDT | Mesoscale Discussion | SPC | Cotton, Tillman | 54 min |
| Apr 23, 5:47 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 16 more | 88 min |
| Apr 23, 6:00 PM CDT | Tornado Watch | SPC | Comanche, Cotton, Stephens, Tillman | 4 hr |
| Apr 22, 7:32 PM CDT | Mesoscale Discussion | SPC | Gaines, Martin | 88 min |
| Apr 23, 12:04 AM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 27 more | 116 min |
| Apr 23, 1:05 AM CDT | Severe Thunderstorm Watch | SPC | Bailey, Castro, Cochran, Dallam, Deaf Smith, Hartley and 10 more | 6 hr |
| Apr 23, 3:59 AM CDT | Mesoscale Discussion | SPC | Bailey, Castro, Cochran, Deaf Smith, Hale, Hartley and 13 more | 2 hr |
| Apr 23, 2:12 PM CDT | Mesoscale Discussion | SPC | Bandera, Crockett, Edwards, Kerr, Kimble, Kinney and 7 more | 93 min |
| Apr 23, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | Crockett, Edwards, Kimble, Kinney, Mason, Menard and 4 more | 5 hr |
| Apr 23, 4:02 PM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Kimble, Kinney, Mason, Menard and 5 more | 88 min |
Nearby
Tornado Watches in Texas, 2003Tornado Watches in Oklahoma, 2003Every tornado watch in 2003
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.