Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 113, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 17, 1998, 11:23 AM CST for Plaquemines Parish, Louisiana. It was in force for 92 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
- Mar 17, 1998, 11:23 AM CST (17:23 UTC)
- Expired
- Mar 17, 1998, 12:55 PM CST
- In force
- 92 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 12:00Z, 5.4 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
- 28 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 773 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 389 m²/s²
- 0-3 km storm-relative helicity
- 463 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
302 WUUS1 KNEW 171727 RRA SVRNEW GMZ550-555-570-575-LAC075-171850- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1123 AM CST TUE MAR 17 1998 THE NATIONAL WEATHER SERVICE HAS ISSUED A... * SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING FOR - SOUTHERN PLAQUEMINES PARISH SOUTHEASTERN LOUISIANA AND COASTAL WATERS OUT 50 NM - FROM BRETON SOUND TO THE MISSISSIPPI RIVER TO BARATARIA BAY * UNTIL 1255 PM CST * AT 1119 AM CST NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 2 SEVERE THUNDERSTORMS. ONE STORM WAS LOCATED AT THE MOUTH OF SOUTHWEST PASS OF THE MISSISSIPPI RIVER. THE SECOND STORM WAS LOCATED 35 MILES SOUTHWEST OF BURRWOOD. BOTH STORMS WERE MOVING TOWARD THE NE AT CLOSE TO 40 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, Mar 17, 10:00 AM CST, 1 hour 23 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-181630- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1000 AM CST TUE MAR 17 1998 SCATTERED THUNDERSTORMS OVER SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI WILL PERSIST THROUGH THE MORNING AND WILL BEGIN TO DIMINISH AND MOVE EAST LATE THIS AFTERNOON AND TONIGHT. A FEW SEVERE THUNDERSTORMS ARE POSSIBLE...THIS WOULD BE MAINLY A THREAT OF HAIL. ADDITIONALLY...HEAVY RAINFALL WILL ALSO BE POSSIBLE.
Special weather statement, Mar 17, 10:16 AM CST, 1 hour 7 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-171630- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1016 AM CST TUE MAR 17 1998 SCATTERED THUNDERSTORMS IN THE GULF 50 TO 75 MILES OFFSHORE SOUTH OF TERREBONNE BAY ARE MOVING NORTHEAST AND WILL SPREAD OVER LOWER PLAQUEMINES PARISH AND CHANDELEUR SOUND MOVIVING TOWARD JACKSON COUNTY MISSISSIPPI THIS AFTERNOON. A FEW THUNDERSTORMS MAY BE SEVERE WITH BRIEF HEAVY RAIN IN THE COASTAL WATERS FROM TERREBONNE BAY TO MOBILE BAY AND INLAND ABOUT 30 MILES OVER PLAQUEMINES PARISH AN IN JACKSON COUNTY THIS AFTERNOON.
Special weather statement, Mar 17, 10:16 AM CST, 1 hour 7 minutes before
LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-171630- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS LA 1016 AM CST TUE MAR 17 1998 SCATTERED THUNDERSTORMS IN THE GULF 50 TO 75 MILES OFFSHORE SOUTH OF TERREBONNE BAY ARE MOVING NORTHEAST AND WILL SPREAD OVER LOWER PLAQUEMINES PARISH AND CHANDELEUR SOUND MOVIVING TOWARD JACKSON COUNTY MISSISSIPPI THIS AFTERNOON. A FEW THUNDERSTORMS MAY BE SEVERE WITH BRIEF HEAVY RAIN IN THE COASTAL WATERS FROM TERREBONNE BAY TO MOBILE BAY AND INLAND ABOUT 30 MILES OVER PLAQUEMINES PARISH AN IN JACKSON COUNTY THIS AFTERNOON.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 1:57 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 33 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; the sounding from the Mesonet's radiosonde archive.