Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 97, NWS New Orleans, LA

April 22, 1997Pointe Coupee Parish, West Feliciana Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 22, 1997, 3:51 PM CDT for Pointe Coupee Parish, West Feliciana Parish, Louisiana. It was in force for 54 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: Apr 22, 1997, 3:51 PM CDT (20:51 UTC)
Expired: Apr 22, 1997, 4:45 PM CDT
In force: 54 min
Issued by: NWS New Orleans, LA
Area: Whole counties

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

What was reported inside it

Time	Report	Where	Remark
Apr 22, 4:15 PM CDT	Thunderstorm Wind	Morganza, LA

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 22, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.9 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: 1498 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 222054 RRA
SVRNEW
LAC077-125-222145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
351 PM CDT TUE APR 22 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  445 PM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...POINTE COUPEE PARISH...WEST FELICIANA PARISH
 
AT 345 PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM
NEAR BIG CANE IN NORTH ST LANDRY PARISH. THE THUNDERSTORM WAS MOVING
EAST AT 30 MPH. COMMUNITIES IN THE PATH OF THIS STORM INCLUDE BATCHELOR
...NEW ROADS...ANGOLA AND ST FRANCISVILLE. THIS THUNDERSTORM HAS THE
POTENTIAL TO PRODUCE HAIL LARGER THAN ONE INCH IN DIAMETER AND DAMAGING
WIND GUSTS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOFWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 4:45 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana	45 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997 Every severe thunderstorm warning in 1997

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.