Alert archive / Mississippi / Tornado Watches in 2000

Tornado Watch 12

January 3, 2000Saint Helena Parish, Tangipahoa Parish, Washington Parish, Louisiana; 19 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Jan 3, 2000, 7:15 PM CST for Saint Helena Parish, Tangipahoa Parish, Washington Parish, Louisiana; 19 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jan 3, 2000, 7:15 PM CST (01:15 UTC)
Expired: Jan 4, 2000, 1:00 AM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 22 counties

Saint Helena Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wayne County, MS

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jan 3, 7:16 PM CST	Severe Thunderstorm Warning	JAN	Clarke, Jasper	44 min
Jan 3, 7:24 PM CST	Tornado Warning	JAN	Jones	51 min
Jan 3, 7:34 PM CST	Severe Thunderstorm Warning	MOB	Wayne	71 min
Jan 3, 7:44 PM CST	Tornado Warning	JAN	Simpson, Smith	31 min
Jan 3, 8:05 PM CST	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence	25 min
Jan 3, 8:10 PM CST	Severe Thunderstorm Warning	JAN	Clarke	35 min
Jan 3, 8:14 PM CST	Severe Thunderstorm Warning	JAN	Smith	46 min
Jan 3, 8:33 PM CST	Tornado Warning	JAN	Covington	27 min
Jan 3, 8:49 PM CST	Severe Thunderstorm Warning	JAN	Jasper	31 min
Jan 3, 10:48 PM CST	Severe Thunderstorm Warning	JAN	Forrest	27 min
Jan 3, 11:18 PM CST	Severe Thunderstorm Warning	MOB	Perry	27 min

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 1.3 hours before the alert went out and 116 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: 1234 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 639 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 285 m²/s²
0-3 km storm-relative helicity: 314 m²/s²
Significant tornado parameter: 2.4
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

916 
WWUS9 KMKC 040055
SEL2  

SEL2  
MKC WW 040055
LAZ000-MSZ000-040700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 12
STORM PREDICTION CENTER NORMAN OK
655 PM CST MON JAN 3 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   SOUTHERN LOUISIANA                          
   SOUTHERN MISSISSIPPI                        

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 715 PM UNTIL
100 AM CST.

TORNADOES...HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 50 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES SOUTH SOUTHEAST OF MC COMB MISSISSIPPI TO
15 MILES NORTHWEST OF MERIDIAN MISSISSIPPI.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...  CONTINUE...WW 7...WW 8...WW 9...WW
10...WW 11...

DISCUSSION...STORMS CONTINUE TO DEVELOP IN INSTABILITY AXIS FROM
SERN LA INTO CENTRAL MS.  ALTHOUGH STRONGEST LOW LEVEL WIND FIELDS
MOVING NEWD AWAY FROM THIS AREA...SHEAR PROFILES REMAIN FAVORABLE
FOR ISOLATED SUPERCELLS AND TORNADOES GIVEN THE CAPES AOA 1500
J/KG.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 23035.


...HALES

322,0880 303,0891 303,0905 322,0894

Nearby

Tornado Watches in Mississippi, 2000 Tornado Watches in Louisiana, 2000 Every tornado watch in 2000

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.