Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 2, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Feb 15, 1987, 11:40 AM CST for 4 parishes in Louisiana. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Feb 15, 1987, 11:40 AM CST (17:40 UTC)
- Expired
- Feb 15, 1987, 12:40 PM CST
- In force
- 60 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Assumption Parish, LA, Lafourche Parish, LA, Saint James Parish, LA, Terrebonne Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Boothville, LA (KBVE), launched 12:00Z, 5.7 hours before the alert went out and 139 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
- 497 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 467 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KNEW 151744 COR
SVRNEW
LAC007-109-093-095-151730-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1140 AM CST SUN FEB 15 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1240 PM CST FOR PEOPLE IN THE FOLLOWING PARISHES:
IN SOUTHEAST LOUISIANA
..ASSUMPTION..TERREBONNE..LAFOURCHE..ST.JAMES..ST.JOHN.THE
BAPTIST..
AT 1030 AM CST RADAR INDICATED A LINE OF VERY HEAVY THUNDERSTORMS
EXTENDING FROM NEAR LIVINGSTON SOUTHWARD TO THIBODAUX AND SOUTH INTO
THE GULF. THESE THUNDERSTORMS ARE MOVING EAST AND NORTHEAST
30 TO 40 MPH.
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.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH,
DESTRUCTIVE HAIWL, 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, Feb 15, 9:47 AM CST, 1 hour 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 945 AM CST SUN FEB 15 1987 ...A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON FOR MOST OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METROPOLITAN AREA... ST. LANDRY PARISH SHERIFFS OFFICE REPORTED A POWER LINE DOWN... SOME ROOF DAMAGE AND A SMALL SHED DAMAGED IN OPELOUSAS AT 925AM. NO INJURIES. RADAR SHOWED SCATTERED STRONG THUDERSTORMS BETWEEN SIMMESPORT AND LAFAYETTE AND BETWEEN BATON ROUGE AND NEW IBERIA. THESE THUNDERSTORMS WERE MOVING RAPIDLY NORTHEAST AND WILL BE MOVING THROUGH THE REMAINDER OF ST. LANDRY AND POINTE COUPEE PARISHES DURING THE NEXT HOUR. ELSEWHERE...A LARGE SOLID AREA OF RAIN WITH A FEW STRONG THUNDERSTORMS COVERED LOUISIANA FROM ALEXANDRIA TO THE MISSISSIPPI RIVER...SOUTH ACROSS THE BATON ROUGE AND LAFAYETTE AREAS TO THE COAST. THIS AREA WAS MOVING EAST ABOUT 20 MPH. < REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TLORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATNING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Local storm report, Feb 15, 10:23 AM CST, 1 hour 17 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1020 AM CST SUN FEB 15 1987
0925 AM ST. LANDRY PARISH SHERIFFS OFFICE REPORTED A POWER LINE
DOWN...SEVERAL ROOFS AND A SHED DAMAGED. uTHIS OCCURRED
ON THE WEST OUTSKIRTS OF OPELAUSAS...IN THE PRAIRE RHODE
COMMUNITY. NO INJURIES. REPORT RECEIVED AT 938AM.Local storm report, Feb 15, 10:24 AM CST, 1 hour 16 minutes before
STORM REPORT...CORRECTION
NATIONAL WEATHER SERVICE BATON ROUGE LA
1020 AM CST SUN FEB 15 1987
0925 AM ST. LANDRY PARISH SHERIFFS OFFICE REPORTED A POWER LINE
DOWN...SEVERAL ROOFS AND xA SHED DAMAGED. THIS OCCURRED
ON THE WEST OUTSKIRTS OF OPELAUSAS...IN THE PRAIRIE RHODE
COMMUNITY. NO INJURIES. REPORT RECEIVED AT 938AM.Local storm report, Feb 15, 10:29 AM CST, 1 hour 11 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1130 AM CST SUN FEB 15 1987
1100-1110 AM WEST BATON PARISH SHERIFFS OFFICE REPORTED A TREE FELL ON
A POWER LINE IN THE NORTHERN PART OF THE PARISH AT 1100AM.
AT 1110AM A TREE FELL ON POWER LINE IN THE ADDIS
COMMUNITY.
1112 AM STATE POLICE TROOP A HEADQUATERS REPORTED STRONG WIND...
MARBLE SIZE HAIL AND A STREET SIGN BLOWN OFF AT TH?EIR
OFFICE IN SOUTH BATON ROUGE.Special weather statement, Feb 15, 10:39 AM CST, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1030 AM CST SUN FEB 15 1987 ...A TORNADO WATCH REMAINS IN EFFECT UNTIL NOON FOR MOST OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METROPOLITAN AREA... RADAR SHOWED SCATTERED STRONG THUDERSTORMS WITH VERY HEAVY RAIN BETWEEN CLINTON AND NEW ROADS...EXTENDING SOUTH BETWEEN BATON ROUGE AND IBERVILLE PARISH...MOVING RAPIDLY NORTHEAST. THESE THUNDERSTORMS WILL BE MOVING THROUGH EAST AND WEST FELICIANA...EAST AND WEST BATON ROUGE AND IBERVILLES PARISHES DURING THE NEXT HOUR. SINCE THE GROUND IS ALREADY SATURATED...ADDITIONAL VERY HEAVY RAIN WILL CAUSE FLOODING OF STREETS AND LOW LYING AREAS AS THEY PASS THROUGH THESE PARISHES. ELSEWHERE...A LARGE SOLID AREA OF RAIN WITH A FEW STRONG THUNDERSTORMS COVERED LOUISIANA FROM ALEXANDRIA TO LAFAYETTE...EAST TO NEW ORLEANS AND BOGALUSA. THIS AREA WAS MOVING SLOWLY EAST. < REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATNING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Feb 15, 10:44 AM CST, 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1145 AM CST SUN FEB 15 1987 ...THE TORNADO WATCH IS NO LONGER IN EFFECT FOR AVOYELLES...EAST BATON ROUGE...EAST FELICIANA...IBERVILLE...POINTE COUPEE...ST. LANDRY ...WEST BATON ROUGE...AND WEST FELICIANA PARISHES...BUT REMAINS IN EFFECT UNTIL NOON FOR ASCENSION...LIVINGSTON AND ST. HELENA PARISHES... WEST BATON ROUGE SHERIFFS OFFICE REPORTED SOME POWER LINES DOWN IN THE NORTH PART OF WEST BATON ROUGE PARISH...WITH STRONG WIND AND MARBLE SIZE HAIL REPORTED IN SOUTH BATON ROUGE AT TROOP A STATE POLICE HEADQUATERS BETWEEN 1100AM AND 1112AM. RADAR SHOWED SCATTERED STRONG THUDERSTORMS WITH VERY HEAVY RAIN FROM ST. HELENA SOUTH ACROSS LIVINGSTON AND ASCENSION PARISHES...MOVING RAPIDLY NORTHEAST. AS THESE THUNDERSTORMS PASS THROUGH...FLOODING OF STREETS AND LOW LYING AREAS CAN ALSO BE EXPECTED. ELSEWHERE...RADAR SHOWED A LARGE ALMOST SOLID AREA OF RAIN WITH A FEW STRONG THUNDERSTORMS FROM ANGOLA TO BOGALUSA...SOUTH TO THE COASTAL WATERS. MOVEMENT WAS EAST ABOUT 20 MPH. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THEXSE AREAS SHOULD BE ON THE LOOKOUT FOR THREATNING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 10:30 AM CST | Severe Thunderstorm Warning | LIX | Assumption, Saint Martin, St. Mary | 60 min |
| Feb 15, 11:40 AM CST | Severe Thunderstorm Warning | LIX | Saint John the Baptist | 60 min |
| Feb 15, 12:30 PM CST | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Tammany | 60 min |
| Feb 15, 12:30 PM CST | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 60 min |
| Feb 15, 12:30 PM CST | Severe Thunderstorm Warning | LIX | Lafourche, Saint Charles, Saint John the Baptist | 60 min |
| Feb 15, 1:30 PM CST | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines | 45 min |
| Feb 15, 1:30 PM CST | Severe Thunderstorm Warning | LIX | Saint Bernard | 45 min |
| Feb 15, 1:30 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 45 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1987Every severe thunderstorm warning in 1987
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.