Alert archive / Texas / Mesoscale Discussions in 2003
Mesoscale Discussion 244
The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2003, 3:53 PM CST for Beauregard Parish, Calcasieu Parish, Louisiana; 30 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2003, 3:53 PM CST (21:53 UTC)
- Expired
- Mar 13, 2003, 6:00 PM CST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Beauregard Parish, LA, Calcasieu Parish, LA, Angelina County, TX, Austin County, TX, Brazoria County, TX, Brazos County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 118 km from the middle of the area, began a volume at 21:55 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.9 hours before the alert went out and 180 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
- 2612 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 463 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 6.2
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 7:52 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 8 more | 113 min |
| Mar 13, 8:30 AM CST | Severe Thunderstorm Watch | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 7 more | 6 hr |
| Mar 13, 8:50 AM CST | Severe Thunderstorm Watch | SPC | Avoyelles, Catahoula, Concordia, East Carroll, Franklin, Madison and 1 more | 5 hr |
| Mar 13, 10:45 AM CST | Severe Thunderstorm Watch | SPC | Ascension, Assumption, East Baton Rouge, Iberia, Iberville, Jefferson and 12 more | 5 hr |
| Mar 13, 10:53 AM CST | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 5 more | 2 hr |
| Mar 13, 11:29 AM CST | Mesoscale Discussion | SPC | Catahoula, Concordia, East Carroll, Madison, Tensas | 2 hr |
| Mar 13, 1:26 PM CST | Mesoscale Discussion | SPC | Ascension, Assumption, Jefferson, Lafourche, Livingston, Orleans and 5 more | 2 hr |
| Mar 13, 2:15 PM CST | Mesoscale Discussion | SPC | Jefferson, Orleans, Plaquemines, Saint Bernard | 2 hr |
| Mar 13, 12:56 AM CST | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Delta, Fannin, Franklin and 6 more | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Louisiana, 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.