Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 741
The Storm Prediction Center issued this mesoscale discussion at May 4, 2003, 6:28 PM CDT for 11 counties in Oklahoma; 23 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 4, 2003, 6:28 PM CDT (23:28 UTC)
- Expired
- May 4, 2003, 8:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Pushmataha County, OK, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Tarrant County, TX, Van Zandt County, TX, Wise County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 96 km from the middle of the area, began a volume at 23:29 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.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 11.5 hours before the alert went out and 75 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
- 1425 J/kg
- Mixed-layer CIN
- -324 J/kg
- Mixed-layer LCL
- 660 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 384 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
023 ACUS11 KWNS 042328 SWOMCD SPC MCD 042328 OKZ000-TXZ000-050130- MESOSCALE DISCUSSION 0741 NWS STORM PREDICTION CENTER NORMAN OK 0628 PM CDT SUN MAY 04 2003 AREAS AFFECTED...N TX...SRN OK CONCERNING...TORNADO WATCH 234... VALID 042328Z - 050130Z THREAT FOR TORNADIC SUPERCELLS CONTINUES. SURFACE ANALYSIS SHOWS NEARLY STATIONARY DRYLINE FROM ADH TO ADM TO JUST W OF MWL. AIR MASS E OF DRYLINE REMAINS VERY UNSTABLE WITH MLCAPES TO 3000 J/KG. FWS VWP SHOWS AROUND 400 M2/S2 SRH IN THE 0-3 KM LAYER ALONG WITH STRONG DEEP LAYER SHEAR...FAVORABLE FOR TORNADIC SUPERCELLS. LATEST RUC AND ETA MODELS BOTH COOL THE CAP LAYER BETWEEN 850 AND 700 MB THROUGH EARLY EVENING. LATEST RUC SHOWS STRONG SUBSIDENCE BEHIND ERN OK STORMS...THIS LOOKS REASONABLE GIVEN CURRENT LACK OF CU ON VIS IMAGERY. UVVS CONTINUE HOWEVER OVER SERN PORTIONS OF WATCH WHERE ADDITIONAL DEVELOPMENT IS MOST LIKELY. ..JEWELL.. 05/04/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...TSA...FWD...OUN... 32129610 32279826 32789840 34149742 34879672 34619502 33009521
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:05 PM CDT | Tornado Watch | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 14 more | 6 hr |
| May 3, 10:00 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Canadian, Comanche, Cotton and 12 more | 2 hr |
| May 4, 11:44 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Cherokee, Coal, Craig, Creek and 27 more | 3 hr |
| May 4, 12:35 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Craig, Creek, Delaware, Haskell and 22 more | 6 hr |
| May 4, 2:16 PM CDT | Mesoscale Discussion | SPC | Bryan, Johnston, Love, Marshall, Murray | 119 min |
| May 4, 3:00 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 6 more | 6 hr |
| May 4, 3:05 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Craig, Delaware, Haskell, McIntosh and 9 more | 115 min |
| May 4, 4:43 PM CDT | Mesoscale Discussion | SPC | Craig, Nowata, Ottawa | 2 hr |
| May 4, 5:20 PM CDT | Mesoscale Discussion | SPC | Adair, Cherokee, Delaware, Haskell, LeFlore, Ottawa and 1 more | 55 min |
| May 4, 6:05 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Craig, Delaware, Haskell, Latimer and 5 more | 7 hr |
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; radar from the NEXRAD Level II archive.