Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 155, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 25, 1997, 3:17 AM CDT for Plaquemines Parish, Louisiana. It was in force for 13 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
- May 25, 1997, 3:17 AM CDT (08:17 UTC)
- Expired
- May 25, 1997, 3:30 AM CDT
- In force
- 13 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Plaquemines Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 8.3 hours before the alert went out and 79 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.
- Mixed-layer CAPE
- 216 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 835 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
773 WUUS1 KNEW 250820 RRA SVRNEW LAC075-250830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 317 AM CDT SUN MAY 25 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 AM CDT FOR RESIDENTS IN THE FOLLOWING LOCATION... IN SOUTHEAST LOUISIANA ...SOUTHERN PLAQUEMINES PARISH AT 319 AM CST NATIONAL WEATHER SERVICE RADARA INDICATED A SEVERE THUNDERSTORM LOCATED IN THE BURAS-EMPIRE AREA MOVING TOWARD THE NORTHEAST AT 25 MPH. 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 LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DONT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
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.
In the hours before
Special weather statement, May 24, 10:00 PM CDT, 5 hours 17 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-251200- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1000 PM CDT SAT MAY 24 1997 ...LOCALLY HEAVY RAINFALL REMAINS A CONCERN ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI... AN ABUNDANCE OF TROPICAL MOISTURE ACROSS THE REGION IN ADVANCE OF AN APPROACHING UPPER LEVEL DISTURBANCE WILL MAINTAIN A RISK OF THUNDERSTORMS THROUGH SUN MORNING. THE PRIMARY THREAT WILL BE HEAVY RAINFALL WITH RATES AVERAGING BETWEEN 1 AND 2 INCHES PER HOUR. SOME LOCATIONS MAY RECEIVE AS MUCH AS 5 INCHES BEFORE DAYBREAK...BUT THESE AMOUNTS SHOULD REMAIN ISOLATED IN COVERAGE.
Special weather statement, May 24, 10:05 PM CDT, 5 hours 12 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-251200- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1000 PM CDT SAT MAY 24 1997 ...LOCALLY HEAVY RAINFALL REMAINS A CONCERN ACROSS SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI... AN ABUNDANCE OF TROPICAL MOISTURE ACROSS THE REGION IN ADVANCE OF AN APPROACHING UPPER LEVEL DISTURBANCE WILL MAINTAIN A RISK OF THUNDERSTORMS THROUGH SUN MORNING. THE PRIMARY THREAT WILL BE HEAVY RAINFALL WITH RATES AVERAGING BETWEEN 1 AND 2 INCHES PER HOUR. SOME LOCATIONS MAY RECEIVE AS MUCH AS 5 INCHES BEFORE DAYBREAK...BUT THESE AMOUNTS SHOULD REMAIN ISOLATED IN COVERAGE.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 6:22 AM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 68 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1997Every 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; the sounding from the Mesonet's radiosonde archive.