Alert archive / Louisiana / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 154

April 15, 200122 parishes in Louisiana; 13 counties in Mississippi; Sabine County, Shelby County, Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 15, 2001, 1:00 PM CDT for 22 parishes in Louisiana; 13 counties in Mississippi; Sabine County, Shelby County, Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Apr 15, 2001, 1:00 PM CDT (18:00 UTC)
Expired: Apr 15, 2001, 6:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 37 counties

Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Grant Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Saint Helena Parish, LA, Saint Landry Parish, LA, Tangipahoa Parish, LA, Vernon Parish, LA, Washington 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, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS, Sabine County, TX, Shelby County, TX

Warnings issued inside it

10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Apr 15, 1:41 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches	19 min
Apr 15, 1:53 PM CDT	Severe Thunderstorm Warning	SHV	Winn	37 min
Apr 15, 1:53 PM CDT	Severe Thunderstorm Warning	SHV	Shelby	37 min
Apr 15, 2:15 PM CDT	Severe Thunderstorm Warning	SHV	Grant	60 min
Apr 15, 2:26 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Jefferson, Lincoln	49 min
Apr 15, 2:49 PM CDT	Severe Thunderstorm Warning	SHV	LaSalle	56 min
Apr 15, 2:53 PM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike	52 min
Apr 15, 3:09 PM CDT	Severe Thunderstorm Warning	JAN	Lawrence	36 min
Apr 15, 3:24 PM CDT	Severe Thunderstorm Warning	LIX	Walthall	51 min
Apr 15, 3:39 PM CDT	Severe Thunderstorm Warning	JAN	Marion	51 min

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 6.0 hours before the alert went out and 164 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -51 m²/s²
0-3 km storm-relative helicity: -46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

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
Apr 15, 5:15 AM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Coahoma, DeSoto, Itawamba, Lafayette and 11 more	6 hr

Nearby

Severe Thunderstorm Watches in Louisiana, 2001 Severe Thunderstorm Watches in Mississippi, 2001 Severe Thunderstorm Watches in Texas, 2001 Every 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.