Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 697
The Storm Prediction Center issued this mesoscale discussion at May 13, 2004, 9:57 PM CDT for 15 counties in Texas. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- May 13, 2004, 9:57 PM CDT (02:57 UTC)
- Expired
- May 13, 2004, 11:30 PM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
Counties Aransas County, TX, Bee County, TX, Dimmit County, TX, Duval County, TX, Frio County, TX, Jim Wells County, TX, Kinney County, TX, Kleberg County, TX, La Salle County, TX, Live Oak County, TX, Maverick County, TX, McMullen County, TX, Nueces County, TX, San Patricio County, TX, Zavala County, TX
The radar
The Corpus Christi radar (KCRP), 158 km from the middle of the area, began a volume at 02:59 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
Corpus Christi, TX (KCRP), launched 00:00Z, 3.0 hours before the alert went out and 176 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
- 3220 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 573 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
994 ACUS11 KWNS 140258 SWOMCD SPC MCD 140257 TXZ000-140430- MESOSCALE DISCUSSION 0697 NWS STORM PREDICTION CENTER NORMAN OK 0957 PM CDT THU MAY 13 2004 AREAS AFFECTED...S TX CONCERNING...SEVERE THUNDERSTORM WATCH 204... VALID 140257Z - 140430Z DAMAGING WIND...LARGE HAIL AND VERY HEAVY RAINFALL THREATS CONTINUE ACROSS SOUTH TX THIS EVENING. MESOANALYSIS/RADAR SHOW THAT THE OUTFLOW BOUNDARY THAT EMANATED FROM LARGE E TX MCS HAS SPLAYED SEWD OFF THE TX COAST...WITH WRN EXTENT NOW QUASI-STATIONARY FROM NEAR KCRP-25 SW KCOT. TSTMS CONTINUE TO FORM ACROSS THE RIO GRANDE VLY WEST OF KCOT AND MOVE EWD TOWARD THE KCRP REGION ALONG/NORTH OF THE BOUNDARY. VERY STEEP LAPSE RATES NOTED ON THE 00 UTC KCRP SOUNDING ATOP RICH MOIST BOUNDARY LAYER CONTINUES TO SUPPORT VERY UNSTABLE AIR MASS ACROSS DEEP SOUTH TX...WITH MUCAPES OF 4000-4500 J/KG. THUS...LARGE HAIL AND PERHAPS DAMAGING WIND POTENTIAL WILL CONTINUE THE NEXT SEVERAL HOURS. IN ADDITION TO THE SEVERE THREAT...BACKBUILDING/TRAINING MCS APPEARS TO BE DEVELOPING IN A 40 MILE CORRIDOR CENTERED KCOT-KCRP. STRONGEST MOISTURE CONVERGENCE IS LOCATED VCNTY KCOT...WITH MEAN WIND FLOW LIKELY TO CARRY TSTMS EWD TOWARD THE COAST NEAR KCRP. AVAILABILITY OF MID 70 DEW POINTS AND WEAK UNIDIRECTIONAL...CLOUD BEARING SHEAR SUGGEST THAT HEAVY RAINFALL WILL REMAIN A THREAT. ..RACY.. 05/14/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CRP...EWX...BRO... 28320070 29540075 28009655 26829655
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | Aransas, Bee, Dimmit, Duval, Frio, Jim Wells and 9 more | 5 hr |
| May 13, 9:39 PM CDT | Mesoscale Discussion | SPC | Bandera, Edwards, Gillespie, Kerr, Kimble, Mason and 5 more | 96 min |
| May 13, 10:13 PM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more | 92 min |
| May 13, 11:17 PM CDT | Mesoscale Discussion | SPC | Aransas, Bandera, Bee, Brooks, Cameron, Dimmit and 27 more | 58 min |
| May 13, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Hidalgo, Kenedy, Kleberg, Starr and 1 more | 4 hr |
| May 14, 2:14 AM CDT | Mesoscale Discussion | SPC | Brooks, Cameron, Hidalgo, Kenedy, Kleberg, Starr and 1 more | 91 min |
Nearby
Mesoscale Discussions in Texas, 2004Every mesoscale discussion in 2004
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.