Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 2124
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2003, 3:11 PM CDT for 43 counties in Texas. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2003, 3:11 PM CDT (20:11 UTC)
- Expired
- Aug 8, 2003, 5:45 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 43 counties
Austin County, TX, Bandera County, TX, Bastrop County, TX, Bell County, TX, Bexar County, TX, Blanco County, TX, Brazos County, TX, Brown County, TX, Burleson County, TX, Burnet County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, Coryell County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Gillespie County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hamilton County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Madison County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Milam County, TX, Mills County, TX, Robertson County, TX, San Saba County, TX, Travis County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Williamson County, TX
The radar
The Austin/San Antonio radar (KEWX), 61 km from the middle of the area, began a volume at 20:14 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
Corpus Christi, TX (KCRP), launched 12:00Z, 8.2 hours before the alert went out and 286 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
- 812 J/kg
- Mixed-layer CIN
- -261 J/kg
- Mixed-layer LCL
- 1334 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -59 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.5
The text
As transmitted, in the capitals the NWS used until 2016.
981 ACUS11 KWNS 082011 SWOMCD SPC MCD 082011 TXZ000-082245- MESOSCALE DISCUSSION 2124 NWS STORM PREDICTION CENTER NORMAN OK 0311 PM CDT FRI AUG 08 2003 AREAS AFFECTED...SCNTRL/SERN TX CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 082011Z - 082245Z ISOLD TSTMS WERE BEGINNING TO INCREASE ACROSS PORTIONS OF SCNTRL AND SERN TX. PRIMARY THREAT FROM THIS ACTIVITY WILL BE STRONG WINDS. LATEST OBJECTIVE DATA WAS SHOWING MLCAPE HAS CLIMBED TO OVER 2000 J/KG FROM SAN ANTONIO...NEWD TO BURNETT...AND SEWD TO BEAUMONT TX THIS AFTERNOON. LATEST POINT FCST SOUNDINGS WERE INDICATING CONVECTIVE INHIBITION HAS BEEN ELIMINATED AS SURFACE TEMPS CLIMB ABOVE 100F AND VERY MOIST BOUNDARY LAYER MIXES AND DEEPENS. ALTHOUGH LARGE SCALE FORCING FOR UPWARD MOTION APPEARS WEAK...LOW LEVEL CONVERGENCE ALONG RESIDUAL FRONTAL ZONE ACROSS THE REGION APPEARS SUFFICIENT FOR STORM DEVELOPMENT. IF ACTIVITY CONTINUES TO INCREASE IN COVERAGE...STRONG STORM DOWNDRAFTS ARE LIKELY GIVEN DCAPE AROUND 1400 J/KG AND LARGE SURFACE T/TD DEPRESSIONS. OUTFLOW BOUNDARIES FROM WEAKLY ORGANIZED MULTICELL STORMS COULD AID ADDITIONAL STORM DEVELOPMENT GIVEN HIGH CAPE AND LOW INHIBITION. ACTIVITY SHOULD DRIFT/PROPAGATE SWD BASED ON MODEST NLY STEERING FLOW. ..CARBIN.. 08/08/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...HGX...FWD...EWX...SJT... 29339555 29229765 29359854 29699928 30219987 31030011 31809934 31699783 30829550
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 6:05 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bandera, Bastrop, Bee, Bexar and 36 more | 85 min |
| Aug 8, 6:37 PM CDT | Mesoscale Discussion | SPC | Armstrong, Carson, Dallam, Deaf Smith, Donley, Gray and 10 more | 2 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; radar from the NEXRAD Level II archive.