Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 699
The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 9:30 PM CDT for 19 counties in Arkansas; Choctaw County, McCurtain County, Oklahoma; 20 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 2, 2003, 9:30 PM CDT (02:30 UTC)
- Expired
- May 2, 2003, 11:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 41 counties
Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Drew County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Polk County, AR, Sevier County, AR, Choctaw County, OK, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Collin County, TX, Delta County, TX, Fannin County, TX, Franklin County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 122 km from the middle of the area, began a volume at 02:29 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 2.5 hours before the alert went out and 121 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
- 1869 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1427 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
230 ACUS11 KWNS 030230 SWOMCD SPC MCD 030230 ARZ000-LAZ000-TXZ000-OKZ000-030430- MESOSCALE DISCUSSION 0699 NWS STORM PREDICTION CENTER NORMAN OK 0930 PM CDT FRI MAY 02 2003 AREAS AFFECTED...SERN OK...SRN AR...NERN TX...NRN LA CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 030230Z - 030430Z SEVERE THUNDERSTORMS ARE FINALLY FORMING FROM SERN OK INTO SRN AR. SHEAR AND INSTABILITY PARAMETERS SUGGEST LARGE HAIL AND DAMAGING WIND GUSTS WILL BE POSSIBLE. A NEW WW IS BEING CONSIDERED. POOL OF VERY UNSTABLE AIR WITH MLCAPE OF 2000-3000 J/KG IN PLACE. STORMS HAVE FINALLY FORMED IN ARKLATEX REGION WHERE A WEAK SURFACE LOW EXISTS. INITIATION MAY HAVE BEEN HELPED BY NOCTURNAL COOLING ABOVE THE MOIST BOUNDARY LAYER. LATEST RUC MODEL SHOWS PRECIPITATION CONTINUING THROUGH THE EVENING OVER SRN AR. GIVEN STRONG DEEP LAYER SHEAR AS SEEN ON DQU PROFILER...A FEW ORGANIZED STORMS WILL BE POSSIBLE PRODUCING LARGE HAIL AND DAMAGING WINDS. ..JEWELL.. 05/03/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...JAN...LZK...SHV...TSA...FWD...OUN... 32999321 32579526 32489656 33509661 34299569 34669449 34329278 33999173 33489167
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 2, 9:50 PM CDT | Severe Thunderstorm Watch | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 15 more | 5 hr |
| May 2, 11:42 PM CDT | Mesoscale Discussion | SPC | Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 15 more | 93 min |
| May 3, 2:36 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleburne and 26 more | 24 min |
| May 3, 12:29 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 2 more | 3 hr |
| May 3, 1:40 PM CDT | Tornado Watch | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 6 hr |
| May 3, 3:42 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 2 hr |
| May 3, 6:49 PM CDT | Mesoscale Discussion | SPC | Columbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more | 56 min |
| May 3, 1:42 PM CDT | Mesoscale Discussion | SPC | Beaver, Beckham, Greer, Harmon, Jackson, Roger Mills and 2 more | 3 hr |
| May 3, 4:00 PM CDT | Tornado Watch | SPC | Caddo, Comanche, Cotton, Grady, Greer, Harmon and 5 more | 5 hr |
| May 3, 6:10 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 11 more | 65 min |
| May 2, 8:09 PM CDT | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Burnet, Comanche, Coryell and 23 more | 96 min |
| May 2, 10:25 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Callahan, Coleman, Comanche, Concho and 11 more | 95 min |
Nearby
Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Arkansas, 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.