Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 285, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Oct 25, 1997, 12:22 PM CDT for Livingston Parish, Tangipahoa Parish, Louisiana. It was in force for 68 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
- Oct 25, 1997, 12:22 PM CDT (17:22 UTC)
- Expired
- Oct 25, 1997, 1:30 PM CDT
- In force
- 68 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Livingston Parish, LA, Tangipahoa Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 5.4 hours before the alert went out and 89 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
- 2541 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 486 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 174 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 12.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 251723 RRA SVRNEW LAC063-105-251830- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1222 PM CDT SAT OCT 25 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 130 PM CDT FOR RESIDENTS IN THE FOLLOWING LOCATIONS... IN SOUTHEAST LOUISIANA ...TANGIPAHOA PARISH AT 1220 CDT SLIDELL RADAR INDICATED A STRONG THUNDERSTORM MOVING INTO SOUTHERN TANGIPAHOA PARISH. THIS STORM WAS MOVING TO THE NORTHEAST AT 30 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 DON'T 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, Oct 25, 10:11 AM CDT, 2 hours 11 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-261500- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1100 AM CDT SAT OCT 25 1997 THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA IS FORECASTING AN OUTBREAK OF SEVERE THUNDERSTORMS AND TORNADOES ACROSS MOST OF THE LOWER MISSISSIPPI VALLEY THIS AFTERNOON AND TONIGHT.. AN UPPER AIR TROUGH IS MOVING EASTWARD INTO TEXAS. STRONG LOW LEVEL FLOW OFF THE GULF OF MEXICO IS BRING IN WARM MOIST UNSTABLE AIR INTO THE REGION. A STRONG JET REMAINS IN PLACE OVER THE CENTRAL GULF COAST. AS THE UPPER AIR TROUGH APPROACHES A FEW SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS SOUTHEAST LOUISIANA AND PORTIONS OF SOUTHWEST MISSISSIPPI AND THE MISSISSIPPI GULF COAST. PERSONS IN THE THREATENED AREAS ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND TUNE IN TO NOAA WEATHER RADIO...LOCAL RADIO AND TV STATIONS...CABLE OUTLETS...OR CONTACT OUT INTERNET HOMEPAGE AT HTTP://WWW.SRH4.NOAA.GOV UNDER "FORECAST OFFICES" FOR FURTHER INFORMATION ON CURRENT WEATHER CONDITIONS. 23
Special weather statement, Oct 25, 11:00 AM CDT, 1 hour 22 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-261500- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1100 AM CDT SAT OCT 25 1997 THE STORM PREDICTION CENTER IN NORMAN OKLAHOMA IS FORECASTING AN OUTBREAK OF SEVERE THUNDERSTORMS AND TORNADOES ACROSS MOST OF THE LOWER MISSISSIPPI VALLEY THIS AFTERNOON AND TONIGHT.. AN UPPER AIR TROUGH IS MOVING EASTWARD INTO TEXAS. STRONG LOW LEVEL FLOW OFF THE GULF OF MEXICO IS BRING IN WARM MOIST UNSTABLE AIR INTO THE REGION. A STRONG JET REMAINS IN PLACE OVER THE CENTRAL GULF COAST. AS THE UPPER AIR TROUGH APPROACHES A FEW SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS SOUTHEAST LOUISIANA AND PORTIONS OF SOUTHWEST MISSISSIPPI AND THE MISSISSIPPI GULF COAST. PERSONS IN THE THREATENED AREAS ARE URGED TO REVIEW SEVERE WEATHER SAFETY RULES AND TUNE IN TO NOAA WEATHER RADIO...LOCAL RADIO AND TV STATIONS...CABLE OUTLETS...OR CONTACT OUT INTERNET HOMEPAGE AT HTTP://WWW.SRH.NOAA.GOV UNDER FORECAST OFFICES FOR FURTHER INFORMATION ON CURRENT WEATHER CONDITIONS. 23
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 25, 1:08 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 67 min |
| Oct 25, 1:30 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 30 min |
| Oct 25, 1:30 PM CDT | Severe Thunderstorm Warning | LIX | Livingston | 30 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.