Alert archive / Louisiana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 2, NWS New Orleans, LA

January 9, 2000Saint Tammany Parish, Louisiana; Pearl River County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jan 9, 2000, 9:33 PM CST for Saint Tammany Parish, Louisiana; Pearl River County, Mississippi. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jan 9, 2000, 9:33 PM CST (03:33 UTC)
Expired: Jan 9, 2000, 10:15 PM CST
In force: 42 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Saint Tammany Parish, LA, Pearl River County, MS

What was reported inside it

Time	Report	Where	Remark
Jan 9, 10:07 PM CST	Thunderstorm Wind	Lacombe, LA	Several trees were blown down along Interstate 12.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.6 hours before the alert went out and 38 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: 369 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 919 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 100333
SVRNEW
LAC103-MSC109-100415-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
933 PM CST SUN JAN 9 2000
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM CST
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...SOUTHERN ST. TAMMANY PARISH
 
 
IN SOUTH MISSISSIPPI
 
   ...PEARL RIVER COUNTY
 
AT 930 PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
OVER THE WESTERN HALF OF LAKE PONTCHARTRAIN. THIS STORM IS MOVING
NORTHEAST AT 45 MPH TOWARDS SOUTHERN ST TAMMANY PARISH AND WILL
MOVE INTO PEARL RIVER COUNTY MISSISSIPPI WITHIN THE NEX
T 30 MINUTES.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PXASSED.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 9, 9:20 PM CST	Severe Thunderstorm Warning	LIX	Saint John the Baptist	40 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2000 Severe Thunderstorm Warnings in Mississippi, 2000 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.