Alert archive / Louisiana / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 837
The Storm Prediction Center issued this severe thunderstorm watch at Nov 29, 2001, 4:15 AM CST for 27 parishes in Louisiana; 8 counties in Mississippi. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 29, 2001, 4:15 AM CST (10:15 UTC)
- Expired
- Nov 29, 2001, 9:00 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Tensas Parish, LA, Vermilion Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Jefferson County, MS, Lincoln County, MS, Wilkinson County, MS
The radar
The Ft Polk radar (KPOE), 81 km from the middle of the area, began a volume at 10:17 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 6:19 AM CST | Flash Flood Warning | SHV | Grant, LaSalle | 4 hr |
| Nov 29, 7:05 AM CST | Flash Flood Warning | SHV | Caldwell | 3 hr |
| Nov 29, 8:15 AM CST | Severe Thunderstorm Warning | JAN | Copiah, Lawrence, Simpson | 45 min |
| Nov 29, 8:15 AM CST | Severe Thunderstorm Warning | JAN | Lincoln | 45 min |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 10.3 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 399 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 288 m²/s²
- 0-3 km storm-relative helicity
- 426 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 9.5
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 |
|---|---|---|---|---|
| Nov 29, 8:15 AM CST | Tornado Watch | SPC | East Carroll, East Feliciana, Madison, Saint Helena, Tensas, Washington and 1 more | 5 hr |
| Nov 29, 10:00 AM CST | Tornado Watch | SPC | Saint Bernard | 5 hr |
| Nov 29, 12:00 PM CST | Tornado Watch | SPC | Alcorn, Benton, Calhoun, Chickasaw, Choctaw, Clarke and 23 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2001Severe Thunderstorm Watches in Mississippi, 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.