Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 63
The Storm Prediction Center issued this mesoscale discussion at Feb 14, 2003, 5:06 PM CST for 14 counties in Texas. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Feb 14, 2003, 5:06 PM CST (23:06 UTC)
- Expired
- Feb 14, 2003, 7:00 PM CST
- In force
- 114 min
- Issued by
- the Storm Prediction Center
Counties Atascosa County, TX, Bandera County, TX, Dimmit County, TX, Duval County, TX, Frio County, TX, Jim Wells County, TX, Kinney County, TX, La Salle County, TX, McMullen County, TX, Medina County, TX, Real County, TX, Uvalde County, TX, Webb County, TX, Zavala 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
Del Rio, TX (KDRT), launched 12:00Z, 11.1 hours before the alert went out and 159 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
- 705 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 877 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -137 m²/s²
- 0-3 km storm-relative helicity
- -95 m²/s²
- Significant tornado parameter
- -0.4
- Supercell composite
- -2.1
The text
As transmitted, in the capitals the NWS used until 2016.
148 ACUS11 KWNS 142307 SWOMCD SPC MCD 142306 TXZ000-150100- MESOSCALE DISCUSSION 0063 NWS STORM PREDICTION CENTER NORMAN OK 0506 PM CST FRI FEB 14 2003 AREAS AFFECTED...SRN TX CONCERNING...SEVERE THUNDERSTORM WATCH 1... VALID 142306Z - 150100Z NEW WW WILL LIKELY REQUIRED WITHIN THE NEXT HOUR...WHICH WILL REPLACE WW 001. THE PRIMARY SEVERE WEATHER THREATS WILL BE LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS. REGIONAL RADAR INDICATES CONVECTION INCREASING IN STRENGTH FROM BANDERA COUNTY SWWD INTO LA SALLE COUNTY. THESE STORMS ARE MOVING THROUGH A LOW LEVEL INSTABILITY AXIS WITH 100MB MLCAPES OF 1000-1500 J/KG. LATEST GRK/EWX VWP DATA INDICATES 0-6 KM SHEAR VALUES OF 40-50 KTS. THIS SHEAR/INSTABILITY COMBINATION WILL SUPPORT SUPERCELLS WITH LARGE HAIL AND DAMAGING WINDS BEING THE PRIMARY THREATS. THESE STORMS WILL LIKELY INCREASE IN COVERAGE AS SHORTWAVE --CURRENTLY EVIDENT ON WATER VAPOR IMAGERY-- CONTINUES TO LIFT NEWD OUT OF CHIHUAHUA MEXICO. THUS...A NEW WW WILL LIKELY BE REQUIRED...REPLACING WW 001 AND EXTENDING EWD TOWARD THE COAST. ..MEAD.. 02/14/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 29919983 29919891 28609840 27309790 27309879 27309969 28600022 29910075
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 10:54 PM CST | Mesoscale Discussion | SPC | Coke, Crockett, Glasscock, Howard, Irion, Martin and 5 more | 2 hr |
| Feb 14, 1:50 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Dimmit, Frio, Kendall and 9 more | 3 hr |
| Feb 14, 2:40 PM CST | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Dimmit, Duval, Frio, Jim Wells and 8 more | 5 hr |
| Feb 14, 3:55 PM CST | Mesoscale Discussion | SPC | Archer, Bandera, Bell, Blanco, Bosque, Burnet and 20 more | 2 hr |
| Feb 14, 4:40 PM CST | Severe Thunderstorm Watch | SPC | Anderson, Bastrop, Bell, Blanco, Bosque, Bowie and 43 more | 6 hr |
| Feb 14, 5:30 PM CST | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bee, Bexar, Caldwell, Comal and 22 more | 6 hr |
Nearby
Mesoscale Discussions in Texas, 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.