Alert archive / Louisiana / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 57
The Storm Prediction Center issued this severe thunderstorm watch at Mar 12, 2001, 5:00 AM CST for 14 parishes in Louisiana; 11 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 12, 2001, 5:00 AM CST (11:00 UTC)
- Expired
- Mar 12, 2001, 10:00 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Vernon Parish, LA, Angelina 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 Augustine County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 77 km from the middle of the area, began a volume at 10:59 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
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 7:45 AM CST | Severe Thunderstorm Warning | LCH | Evangeline, Saint Landry | 60 min |
| Mar 12, 8:04 AM CST | Severe Thunderstorm Warning | LCH | Allen, Calcasieu, Jefferson Davis | 56 min |
| Mar 12, 9:28 AM CST | Severe Thunderstorm Warning | LCH | Jefferson Davis | 32 min |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 11.0 hours before the alert went out and 97 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
- 75 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 790 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 223 m²/s²
- 0-3 km storm-relative helicity
- 266 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 1:00 AM CST | Severe Thunderstorm Watch | SPC | Ascension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberville and 15 more | 5 hr |
| Mar 12, 3:30 AM CST | Severe Thunderstorm Watch | SPC | Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 15 more | 6 hr |
| Mar 12, 6:00 AM CST | Severe Thunderstorm Watch | SPC | Ascension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberville and 13 more | 5 hr |
| Mar 12, 10:00 AM CST | Tornado Watch | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 17 more | 5 hr |
| Mar 11, 11:00 PM CST | Severe Thunderstorm Watch | SPC | Bandera, Bexar, Comal, Edwards, Guadalupe, Hays and 9 more | 5 hr |
| Mar 12, 2:00 AM CST | Severe Thunderstorm Watch | SPC | Angelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 29 more | 4 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2001Severe Thunderstorm Watches in Texas, 2001Every severe thunderstorm watch in 2001
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.