Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 75
The Storm Prediction Center issued this mesoscale discussion at Feb 15, 2003, 6:48 AM CST for 12 counties in Texas. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Feb 15, 2003, 6:48 AM CST (12:48 UTC)
- Expired
- Feb 15, 2003, 8:15 AM CST
- In force
- 87 min
- Issued by
- the Storm Prediction Center
Counties Brooks County, TX, Cameron County, TX, Duval County, TX, Hidalgo County, TX, Jim Hogg County, TX, Jim Wells County, TX, Kenedy County, TX, Kleberg County, TX, Nueces County, TX, San Patricio County, TX, Starr County, TX, Willacy County, TX
The radar
The Corpus Christi radar (KCRP), 115 km from the middle of the area, began a volume at 12:48 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, 0.8 hours before the alert went out and 118 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
- 741 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 605 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 74 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
727 ACUS11 KWNS 151248 SWOMCD SPC MCD 151248 TXZ000-151415- MESOSCALE DISCUSSION 0075 NWS STORM PREDICTION CENTER NORMAN OK 0648 AM CST SAT FEB 15 2003 AREAS AFFECTED...SOUTH TX CONCERNING...SEVERE THUNDERSTORM WATCH 6... VALID 151248Z - 151415Z 12Z SOUNDINGS FROM SOUTH TX REFLECT MID LEVEL CAA AHEAD OF UPPER SHORTWAVE TROUGH LIFTING ACROSS NERN MEXICO. THIS APPEARS TO BE PARTLY RESPONSIBLE FOR ORIENTATION OF ONGOING CONVECTION AS IT MARCHES EWD AT ROUGHLY 30 KT. SQUALL LINE WILL LIKELY MOVE INTO NWRN PORTIONS OF GULF OF MEXICO...WITH NWD DEVELOPMENT POSSIBLE INTO MIDDLE/UPPER TX COAST REGION OVER THE NEXT FEW HOURS. LOCALLY DAMAGING WINDS AND LARGE HAIL REMAIN POSSIBLE WITH THIS ACTIVITY. ..DARROW.. 02/15/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... 25829823 25819928 26969900 28109872 28109766 28109659 26969689 25819718
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 14, 6:57 PM CST | Mesoscale Discussion | SPC | Anderson, Bastrop, Bell, Blanco, Bosque, Bowie and 43 more | 2 hr |
| Feb 14, 7:37 PM CST | Mesoscale Discussion | SPC | Anderson, Bastrop, Bell, Blanco, Bosque, Bowie and 43 more | 113 min |
| Feb 14, 9:12 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bee, Bexar, Caldwell, Comal and 22 more | 2 hr |
| Feb 14, 10:16 PM CST | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bee, Bell, Bexar and 40 more | 119 min |
| Feb 15, 12:31 AM CST | Mesoscale Discussion | SPC | Atascosa, Bexar, Brooks, Duval, Frio, Jim Hogg and 7 more | 119 min |
| Feb 15, 4:12 AM CST | Mesoscale Discussion | SPC | Refugio | 3 hr |
| Feb 15, 4:35 AM CST | Severe Thunderstorm Watch | SPC | Brooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 6 more | 4 hr |
| Feb 15, 2:47 PM CST | Mesoscale Discussion | SPC | Atascosa, Bee, DeWitt, Goliad, Jim Wells, Karnes and 6 more | 118 min |
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.