Alert archive / Texas / Tornado Watches in 2003
Tornado Watch 49
The Storm Prediction Center issued this tornado watch at Mar 17, 2003, 5:50 PM CST for 25 counties in Oklahoma; 26 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 17, 2003, 5:50 PM CST (23:50 UTC)
- Expired
- Mar 17, 2003, 11:00 PM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 51 counties
Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Okfuskee County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Clay County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Van Zandt County, TX, Wichita County, TX, Wise County, TX, Young County, TX
The radar
The Norman radar (KTLX), 124 km from the middle of the area, began a volume at 23:53 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
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 6:01 PM CST | Tornado Warning | OUN | Comanche, Stephens | 29 min |
| Mar 17, 6:31 PM CST | Severe Thunderstorm Warning | OUN | Grady, Stephens | 44 min |
| Mar 17, 6:43 PM CST | Severe Thunderstorm Warning | OUN | Cleveland | 47 min |
| Mar 17, 7:14 PM CST | Severe Thunderstorm Warning | OUN | Grady | 61 min |
| Mar 17, 7:27 PM CST | Severe Thunderstorm Warning | OUN | Garvin, McClain | 48 min |
| Mar 17, 8:13 PM CST | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 47 min |
| Mar 17, 8:59 PM CST | Severe Thunderstorm Warning | OUN | Cleveland | 16 min |
| Mar 17, 9:21 PM CST | Severe Thunderstorm Warning | OUN | Pottawatomie | 54 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
Norman, OK (KOUN), launched 12:00Z, 11.8 hours before the alert went out and 113 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
- 264 J/kg
- Mixed-layer CIN
- -285 J/kg
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS20 KWNS 172340 SEL9 SPC WW 172350 OKZ000-TXZ000-180500- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 49 STORM PREDICTION CENTER NORMAN OK 550 PM CST MON MAR 17 2003 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTHERN OKLAHOMA NORTH CENTRAL TEXAS EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 550 PM UNTIL 1100 PM CST. 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 85 STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES NORTHWEST OF OKLAHOMA CITY OKLAHOMA TO 45 MILES SOUTH SOUTHEAST OF FORT WORTH 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...THIS TORNADO WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 47. WATCH NUMBER 47 WILL NOT BE IN EFFECT AFTER 550 PM CST. CONTINUE...WW 48... DISCUSSION...ISOLATED SUPERCELLS CONTINUE OVER PARTS OF SOUTHERN OK AND NORTH TX. LATEST MESOANALYSIS SHOWS BACKED LOW LEVEL WINDS...INCREASING CONVERGENCE ALONG DRYLINE AND INCREASING VERTICAL SHEAR. SEVERAL WEAK BOUNDARIES ALSO EXIST ACROSS SOUTHERN OK...INDICATING LOCALLY FAVORABLE AREAS FOR TORNADOES. AVIATION...TORNADOES 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 24035. ...HART 353,0961 321,0953 321,0983 353,0991
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 16, 8:09 PM CST | Mesoscale Discussion | SPC | Beckham, Greer, Harmon, Jackson | 3 hr |
| Mar 17, 11:40 AM CST | Mesoscale Discussion | SPC | Alfalfa, Beaver, Blaine, Caddo, Canadian, Comanche and 16 more | 3 hr |
| Mar 17, 12:45 PM CST | Severe Thunderstorm Watch | SPC | Bryan, Caddo, Canadian, Carter, Cleveland, Coal and 19 more | 6 hr |
| Mar 17, 1:55 PM CST | Severe Thunderstorm Watch | SPC | Alfalfa, Blaine, Custer, Dewey, Garfield, Grant and 10 more | 5 hr |
| Mar 17, 2:47 PM CST | Mesoscale Discussion | SPC | Alfalfa, Blaine, Canadian, Garfield, Grant, Kingfisher and 2 more | 118 min |
| Mar 17, 3:02 PM CST | Mesoscale Discussion | SPC | Carter, Jefferson, Love | 118 min |
| Mar 17, 3:24 PM CST | Mesoscale Discussion | SPC | Beaver, Beckham, Carter, Greer, Jackson, Jefferson and 3 more | 2 hr |
| Mar 17, 11:17 AM CST | Mesoscale Discussion | SPC | Anderson, Bosque, Collin, Dallas, Denton, Ellis and 19 more | 2 hr |
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.