Alert archive / Louisiana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 6, NWS New Orleans, LA

March 9, 2002Ascension Parish, Assumption Parish, Saint James Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 9, 2002, 12:59 PM CST for Ascension Parish, Assumption Parish, Saint James Parish, Louisiana. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 9, 2002, 12:59 PM CST (18:59 UTC)
Expired: Mar 9, 2002, 1:45 PM CST
In force: 46 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Ascension Parish, LA, Assumption Parish, LA, Saint James Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.0 hours before the alert went out and 120 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: 841 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KLIX 091859
SVRNEW
LAC005-007-093-091945-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1257 PM CST SAT MAR 9 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ASCENSION PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITIES OF...GONZALES...DONALDSONVILLE
  ASSUMPTION PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF NAPOLEONVILLE
  ST. JAMES PARISH IN SOUTHEAST LOUISIANA

* UNTIL 145 PM CST

* AT 1253 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER PAINCOURTVILLE...OR ABOUT 5 MILES WEST OF
  NAPOLEONVILLE...MOVING EAST AT 30 MPH.

LARGE HAIL AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER 
IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 9, 11:38 AM CST, 1 hour 21 minutes earlier.

Area forecast discussion, Mar 9, 11:38 AM CST, 1 hour 21 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
1138 AM CST SAT MAR 9 2002

WILL UPDATE AONES FOR WINDS.

.NEW...SMALL CRAFT ADVZY LAKES PONTCHARTRAIN AND MAUREPAS FOR THIS
    AFTERNOON AND COASTAL WATERS KPQL TO ATCHAFALAYA RVR OUT 60 NM
    VALID FOR TONIGHT.
LA...NONE.
MS...NONE.

In the hours before

Special weather statement, Mar 9, 9:00 AM CST, 3 hours 59 minutes before

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-101200-

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NEW ORLEANS LA
900 AM CST SAT MAR 9 2002

.SYNOPSIS...A COLD FRONT WILL MOVE SOUTH AND OVER SOUTHEAST
LOUISIANA THIS AFTERNOON AND OVER SOUTHERN MISSISSIPPI EARLY THIS
EVENING. A STRONG RIDGE OF HIGH PRESSURE WILL REBUILD ACROSS THE
AREA BEHIND THE FRONT.

.THUNDERSTORMS...
SCATTERED SHOWERS AND A FEW THUNDERSTORMS WILL PRECEDE THE COLD
FRONT TODAY WITH MORE NUMEROUS SHOWERS AND THUNDERSTORMS JUST AHEAD
OF THE FRONT THIS AFTERNOON AND EARLY EVENING. BRIEF HEAVY RAINFALL
AND STRONG GUSTY WINDS CAN BE EXPECTED WITH THESE THUNDERSTORMS.
HOWEVER...NO THUNDERSTORMS ARE EXPECTED TO BE REACH SEVERE CRITERIA.

.MARINE...
A SMALL CRAFT ADVISORY IS IN EFFECT FOR LAKES PONTCHARTRAIN AND
MAUREPAS VALID FOR THIS AFTERNOON. THE SMALL CRAFT ADVISORY WILL BE
EXTENDED TO COVER THE COASTAL WATERS OUT TO 60 NAUTICAL MILES FOR
TONIGHT. SOUTHEAST WINDS OF 15 KNOTS WILL SHIFT AFTER THE FRONTAL
PASSAGE TO NORTHWEST AT 20 TO 25 KNOTS OVER THE INLAND LAKES THIS
AFTERNOON AND OVER THE COASTAL WATERS TONIGHT.

.ACTIONS...
NONE.

FOR MORE INFORMATION...VISIT OUR WEB SITE AT WWW.SRH.NOAA.GOV/LIX
(ALL LOWER CASE).

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 9, 1:05 PM CST	Special Marine Warning	LIX		115 min
Mar 9, 1:44 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	46 min
Mar 9, 2:32 PM CST	Special Marine Warning	LIX		118 min
Mar 9, 2:32 PM CST	Special Marine Warning	LIX		118 min
Mar 9, 3:04 PM CST	Special Marine Warning	LIX		116 min
Mar 9, 3:19 PM CST	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	41 min
Mar 9, 4:35 PM CST	Special Marine Warning	LIX		115 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2002 Every severe thunderstorm warning in 2002

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.