Alert archive / Louisiana / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 38
The Storm Prediction Center issued this severe thunderstorm watch at Mar 13, 2003, 8:30 AM CST for 13 parishes in Louisiana; 12 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 13, 2003, 8:30 AM CST (14:30 UTC)
- Expired
- Mar 13, 2003, 2:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Acadia Parish, LA, Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Rapides Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Chambers County, TX, Galveston County, TX, Hardin County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Jacinto County, TX, Tyler County, TX
The radar
The Lake Charles radar (KLCH), 85 km from the middle of the area, began a volume at 14:32 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.
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 13, 8:33 AM CST | Severe Thunderstorm Warning | LCH | Calcasieu, Cameron | 27 min |
| Mar 13, 9:01 AM CST | Severe Thunderstorm Warning | LCH | Calcasieu, Cameron | 59 min |
| Mar 13, 9:02 AM CST | Severe Thunderstorm Warning | LCH | Calcasieu, Cameron | 58 min |
| Mar 13, 9:23 AM CST | Severe Thunderstorm Warning | LCH | Jefferson, Orange | 67 min |
| Mar 13, 10:45 AM CST | Severe Thunderstorm Warning | LCH | Cameron | 60 min |
| Mar 13, 11:12 AM CST | Severe Thunderstorm Warning | HGX | Chambers | 48 min |
| Mar 13, 11:59 AM CST | Severe Thunderstorm Warning | HGX | Chambers | 61 min |
| Mar 13, 12:38 PM CST | Flash Flood Warning | HGX | Chambers | 2 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.5 hours before the alert went out and 87 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
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, 8:50 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, 3:53 PM CST | Mesoscale Discussion | SPC | Beauregard, Calcasieu | 2 hr |
| Mar 13, 12:56 AM CST | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Delta, Fannin, Franklin and 6 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2003Severe Thunderstorm Watches in Texas, 2003Every severe thunderstorm watch 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.