Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 545
The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2003, 3:08 PM CDT for 11 counties in Oklahoma; 54 counties in Texas. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Apr 23, 2003, 3:08 PM CDT (20:08 UTC)
- Expired
- Apr 23, 2003, 4:45 PM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
All 65 counties
Carter County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Jackson County, OK, Jefferson County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Bosque County, TX, Brown County, TX, Callahan County, TX, Childress County, TX, Clay County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Concho County, TX, Cooke County, TX, Coryell County, TX, Cottle County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Fisher County, TX, Foard County, TX, Hamilton County, TX, Hardeman County, TX, Haskell County, TX, Hill County, TX, Hood County, TX, Irion County, TX, Jack County, TX, Johnson County, TX, Jones County, TX, King County, TX, Knox County, TX, Lampasas County, TX, McCulloch County, TX, McLennan County, TX, Mills County, TX, Mitchell County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Runnels County, TX, San Saba County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Stonewall County, TX, Tarrant County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 8.1 hours before the alert went out and 164 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.
248 ACUS11 KWNS 232009 SWOMCD SPC MCD 232008 TXZ000-OKZ000-232145- MESOSCALE DISCUSSION 0545 NWS STORM PREDICTION CENTER NORMAN OK 0308 PM CDT WED APR 23 2003 AREAS AFFECTED...SW OK/WEST CENTRAL AND NW TX CONCERNING...TORNADO WATCH 146... VALID 232008Z - 232145Z TRENDS IN REGIONAL RADARS SHOW BROKEN LINE OF STRONG/SEVERE STORMS FROM WRN WILBARGER COUNTY TX TO COKE COUNTY TX WILL MOVE EAST OF WW 146 IN THE NEXT 2-3 HOURS. NEW WW MAY BE ISSUED IN THE NEXT 2 HOURS FOR SOUTH CENTRAL INTO CENTRAL TX. AIR MASS OVER SOUTH CENTRAL OK INTO CENTRAL TX CONTINUES TO DESTABILIZE THIS AFTERNOON WITH SURFACE DEWPOINTS AROUND 60 F OVER FAR SOUTH CENTRAL OK/NORTH CENTRAL TX TO THE MIDDLE 60S OVER CENTRAL TX. CROSS-BOUNDARY SHEAR VECTORS REMAIN SUPPORTIVE OF DISCRETE SUPERCELLS AS STORMS MOVE ENEWD TOWARD SOUTH CENTRAL OK AND CENTRAL TX INTO THE LATE AFTERNOON. ..PETERS.. 04/23/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FWD...OUN...SJT...LUB...MAF... 31140128 31600139 33070043 34720040 34669826 34829730 34549668 33029680 31399723 31099795 31179946
SPC 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, 4:00 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Carter, Jefferson, Johnston, Love and 3 more | 6 hr |
| 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
Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Oklahoma, 2003Every mesoscale discussion 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.