Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 4, NWS New Orleans, LA

January 12, 1998Pointe Coupee Parish, West Feliciana Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jan 12, 1998, 2:43 AM CST for Pointe Coupee Parish, West Feliciana Parish, Louisiana. It was in force for 62 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: Jan 12, 1998, 2:43 AM CST (08:43 UTC)
Expired: Jan 12, 1998, 3:45 AM CST
In force: 62 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Pointe Coupee Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 8.7 hours before the alert went out and 178 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: 16 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 953 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 253 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

593 
WUUS1 KNEW 120844 RRA
SVRNEW
LAC034-125-120945-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
243 AM CST MON JAN 12 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 345 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHEASTERN LOUISIANA

   ...NORTHEASTERN POINTE COUPEE PARISH
   ...WEST FELICIANA PARISH

AT 240 AM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM JUST WEST OF THE TOWN OF BACHELOR IN NORTHERN POINT
COUPEE PARISH. THE STORM IS MOVING TOWARDS THE NORTHEAST AT 35 MPH.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 12, 4:46 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee	74 min
Jan 12, 6:33 AM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston	62 min
Jan 12, 7:12 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa	63 min
Jan 12, 7:41 AM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	119 min
Jan 12, 8:03 AM CST	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	3 hr
Jan 12, 8:46 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	59 min
Jan 12, 10:50 AM CST	Tornado Warning	LIX	Orleans	35 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1998 Every severe thunderstorm warning in 1998

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.