Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 262, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Aug 31, 1997, 3:40 PM CDT for East Feliciana Parish, Louisiana. It was in force for 50 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
- Aug 31, 1997, 3:40 PM CDT (20:40 UTC)
- Expired
- Aug 31, 1997, 4:30 PM CDT
- In force
- 50 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County East Feliciana Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.7 hours before the alert went out and 145 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
- 1784 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1106 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 312041 RRA SVRNEW LAC037-312130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 340 PM CDT SUN AUG 31 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM CDT FOR RESIDENTS IN THE FOLLOWING LOCATION... IN SOUTHEAST LOUISIANA ...EAST FELICIANA PARISH AT 340 PM NATIONAL WEATHER SERVICE RADAR IN SLIDELL INDICATED A SEVERE THUNDERSTORM OVER NORTHERN PORTION OF EAST FELICIANA PARISH NEAR NORWOOD. THE STORM IS MOVING SOUTH AT 20 MPH. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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, Aug 31, 10:03 AM CDT, 5 hours 37 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-011600- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1030 AM CDT SUN AUG 31 1997 HIGH PRESSURE WILL DRIFT WEST FROM LOUISIANA TO TEXAS TODAY. AN UPPER LEVEL LOW PRESSURE TROUGH WILL MOVE SOUTH AND OVER MISSISSIPPI AND EASTERN LOUISIANA THIS AFTERNOON AND TONIGHT. THE AIRMASS HAS INCREASED MOISTURE IN THE LOWER LEVELS...INCREASED INSTABILITY AND WEAK SHEAR ALOFT WHICH SHOULD CONTRIBUTE TO THE DEVELOPMENT OF SCATTERED AFTERNOON AND EVENING THUNDERSTORMS OVER THE AREA. A FEW OF THESE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE STRONG GUSTY WINDS ALONG WITH HEAVY RAINFALL AND NUMEROUS LIGHTNING DISCHARGES.
Special weather statement, Aug 31, 10:30 AM CDT, 5 hours 10 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-011600- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1030 AM CDT SUN AUG 31 1997 HIGH PRESSURE WILL DRIFT WEST FROM LOUISIANA TO TEXAS TODAY. AN UPPER LEVEL LOW PRESSURE TROUGH WILL MOVE SOUTH AND OVER MISSISSIPPI AND EASTERN LOUISIANA THIS AFTERNOON AND TONIGHT. THE AIRMASS HAS INCREASED MOISTURE IN THE LOWER LEVELS...INCREASED INSTABILITY AND WEAK SHEAR ALOFT WHICH SHOULD CONTRIBUTE TO THE DEVELOPMENT OF SCATTERED AFTERNOON AND EVENING THUNDERSTORMS OVER THE AREA. A FEW OF THESE THUNDERSTORMS COULD BECOME SEVERE AND PRODUCE STRONG GUSTY WINDS ALONG WITH HEAVY RAINFALL AND NUMEROUS LIGHTNING DISCHARGES.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 3:03 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 57 min |
| Aug 31, 4:26 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 64 min |
| Aug 31, 4:29 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 61 min |
| Aug 31, 5:25 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Saint Charles | 65 min |
| Aug 31, 6:07 PM CDT | Severe Thunderstorm Warning | LIX | Assumption | 38 min |
| Aug 31, 6:17 PM CDT | Severe Thunderstorm Warning | LIX | Terrebonne | 28 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.