Alert archive / Mississippi / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 56

March 12, 20014 states

The Storm Prediction Center issued this severe thunderstorm watch at Mar 12, 2001, 3:30 AM CST for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 12, 2001, 3:30 AM CST (09:30 UTC)
Expired
Mar 12, 2001, 9:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 64 counties

Ashley County, AR, Bradley County, AR, Chicot County, AR, Columbia County, AR, Lafayette County, AR, Miller County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Attala County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Smith County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS, Cass County, TX, Harrison County, TX, Marion County, TX, Panola County, TX, Shelby County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 12, 3:40 AM CSTSevere Thunderstorm WarningSHVPanola65 min
Mar 12, 3:41 AM CSTSevere Thunderstorm WarningJANMadison, Yazoo49 min
Mar 12, 4:07 AM CSTSevere Thunderstorm WarningSHVColumbia38 min
Mar 12, 4:10 AM CSTSevere Thunderstorm WarningSHVCaddo65 min
Mar 12, 4:19 AM CSTSevere Thunderstorm WarningSHVShelby41 min
Mar 12, 4:27 AM CSTSevere Thunderstorm WarningSHVBossier63 min
Mar 12, 5:29 AM CSTSevere Thunderstorm WarningJANIssaquena, Sharkey46 min
Mar 12, 5:35 AM CSTSevere Thunderstorm WarningSHVNatchitoches, Winn55 min
Mar 12, 6:29 AM CSTSevere Thunderstorm WarningSHVCaldwell, LaSalle61 min
Mar 12, 6:29 AM CSTSevere Thunderstorm WarningSHVOuachita61 min
Mar 12, 7:01 AM CSTSevere Thunderstorm WarningJANFranklin44 min
Mar 12, 7:07 AM CSTSevere Thunderstorm WarningJANConcordia, Tensas38 min
Mar 12, 7:25 AM CSTSevere Thunderstorm WarningJANClaiborne, Jefferson50 min
Mar 12, 8:03 AM CSTSevere Thunderstorm WarningJANScott27 min
Mar 12, 8:06 AM CSTSevere Thunderstorm WarningJANSimpson, Smith39 min

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 9.5 hours before the alert went out and 155 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2001-03-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2001-03-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 373 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
3 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
676 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
373 m²/s²
0-3 km storm-relative helicity
517 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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.

IssuedProductOfficeCountiesLasted
Mar 12, 1:00 AM CSTSevere Thunderstorm WatchSPCAscension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberville and 15 more5 hr
Mar 12, 5:00 AM CSTSevere Thunderstorm WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 8 more5 hr
Mar 12, 6:00 AM CSTSevere Thunderstorm WatchSPCAscension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberville and 13 more5 hr
Mar 12, 10:00 AM CSTTornado WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 17 more5 hr
Mar 12, 9:00 AM CSTSevere Thunderstorm WatchSPCAttala, Carroll, Choctaw, Clay, Kemper, Lauderdale and 13 more6 hr
Mar 11, 11:00 PM CSTSevere Thunderstorm WatchSPCBandera, Bexar, Comal, Edwards, Guadalupe, Hays and 9 more5 hr
Mar 12, 2:00 AM CSTSevere Thunderstorm WatchSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 29 more4 hr

Nearby

Severe Thunderstorm Watches in Mississippi, 2001Severe Thunderstorm Watches in Louisiana, 2001Severe Thunderstorm Watches in Arkansas, 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.