Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 39, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Feb 10, 1998, 9:02 PM CST for Saint Tammany Parish, Washington Parish, Louisiana. It was in force for 63 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
- Feb 10, 1998, 9:02 PM CST (03:02 UTC)
- Expired
- Feb 10, 1998, 10:05 PM CST
- In force
- 63 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 10, 9:45 PM CST | Thunderstorm Wind 53 | Mandeville, 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 |
|---|---|---|---|
| Feb 10, 4:45 PM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 3.0 hours before the alert went out and 51 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
- 625 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 399 m²/s²
- 0-3 km storm-relative helicity
- 500 m²/s²
- Significant tornado parameter
- 1.4
- Supercell composite
- 6.4
The text
As transmitted, in the capitals the NWS used until 2016.
552 WUUS1 KNEW 110304 RRA SVRNEW LAC051-057-071-089-103-117-110405- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 902 PM CST TUE FEB 10 1998 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1005 PM CST FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTHEASTERN LOUISIANA ...WASHINGTON PARISH ...ST TAMMANY PARISH ...ST CHARLES PARISH ...JEFFERSON PARISH ...ORLEANS PARISH ...LAFOURCHE PARISH AT 9 PM CST RARAR SHOWED A LINE OF NUMEROUS THUNDERSTORMS EXTENDING FROM JUST EAST OF KENTWOOD SOUTH TO LAKE MAUREPAS TO JUST WEST OF HOUMA THEN DOWN TO THE GULF OF MEXICO MOVING EAST AT 35 MILES AN HOUR. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 10, 6:00 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, West Baton Rouge | 60 min |
| Feb 10, 6:00 PM CST | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 60 min |
| Feb 10, 6:56 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena, West Baton Rouge | 64 min |
| Feb 10, 6:56 PM CST | Severe Thunderstorm Warning | LIX | West Feliciana | 64 min |
| Feb 10, 7:38 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Assumption | 62 min |
| Feb 10, 8:00 PM CST | Severe Thunderstorm Warning | LIX | Iberville | 65 min |
| Feb 10, 8:00 PM CST | Severe Thunderstorm Warning | LIX | Livingston, Saint John the Baptist, Tangipahoa | 65 min |
| Feb 10, 8:00 PM CST | Severe Thunderstorm Warning | LIX | Saint James | 65 min |
| Feb 10, 8:12 PM CST | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 63 min |
| Feb 10, 9:02 PM CST | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Orleans, Saint Charles | 63 min |
| Feb 10, 9:49 PM CST | Severe Thunderstorm Warning | LIX | Plaquemines, Saint Bernard | 66 min |
| Feb 10, 11:00 PM CST | Severe Thunderstorm Warning | LIX | Plaquemines | 60 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1998Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.