Alert archive / Louisiana / Tornado Warnings in 1987
Tornado Warning 1, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Mar 17, 1987, 8:25 PM CST for Tangipahoa Parish, Louisiana. It was in force for 65 min.
The area
The counties it named.
The facts
- Issued
- Mar 17, 1987, 8:25 PM CST (02:25 UTC)
- Expired
- Mar 17, 1987, 9:30 PM CST
- In force
- 65 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Tangipahoa 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 00:00Z, 2.4 hours before the alert went out and 174 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
- 937 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 526 m²/s²
- 0-3 km storm-relative helicity
- 619 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 14.7
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this tornado 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, 4:04 PM CST, 4 hours 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 405 PM CST TUE MAR 17 1987 ...A TORNADO WATCH IS IN EFFECT UNTIL 10 PM THIS EVENING FOR ALL OF EAST CENTRAL LOUISIANA EXCEPT CATAHOULA PARISH... RADARS SHOWED A 25 MILE WIDE BAND OF STRONG THUNDERSTORMS FROM THE ACME AREA IN SOUTHERN CONCORDIA PARISH SOUTH ACROSS PARTS OF POINTE COUPEE...AVOYELLES AND INTO ST LANDRY PARISH. THE THUNDERSTORMS WILL PRODUCE HEAVY RAINS CAUSING SOME FLOODING OF LOW AREAS IN THE ABOVE PARISHES DURING THE AFTERNOON. THUNDERSTORMS WILL CONTINUE TO MOVE SLOWLY EASTWARD INTO THE EVENING HOURS. 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 THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Mar 17, 5:17 PM CST, 3 hours 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 520 PM CST TUE MAR 17 1987 ...THE TORNADO WATCH IS CANCELLED FOR AVOYELLES...CONCORDIA...AND ST LANDRY PARISHES...THE TORNADO WATCH CONTINUES UNTIL 10 PM FOR THE REMAINDER OF EAST CENTRAL AND SOUTHEAST LOUISIANA... RADARS SHOWED A 20 MILE WIDE BAND OF STRONG THUNDERSTORMS ALONG THE MISSISSIPPI RIVER NEAR NATCHEZ SOUTH ACROSS POINTE COUPEE AND IBERVILLE PARISHES. THE AREA OF THUNDERSTORMS WAS MOVING SLOWLY EAST AND WILL PRODUCE HEAVY RAINS CAUSING SOME FLOODING OF STREETS...UNDERPASSES AND OTHER LOW AREAS...ESPECIALLY IN METROPOLITAN BATON ROUGE FOR THE NEXT SEVERAL HOURS. 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 THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Mar 17, 5:41 PM CST, 2 hours 44 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 535 PM CST TUE MAR 17 1987 ...TORNADO WATCH IS IN EFFECT FOR ALL OF SOUTHEAST LOUISIANA UNTIL 10PM THIS EVENING... STRONG THUNDERSTORMS WERE OCCURRING FROM THE COAST SOUTH OF LAFAYETTE...NORTHEAST ACROSS THE BATON ROUGE AREA TO NEAR FAYETTE MISSISSIPPI. STRONG GUSTY WINDS...FREQUENT LIGHTNING...LOCALLY HEAVY RAIN...AND HAIL MAY ACCOMPANY THESE THUNDERSTORMS AS THEY MOVE NORTHEAST AT 45 MILES AN HOUR. ELSEWHERE...LESS INTENSE THUNDERSTORMS AND SHOWERS CONTINUED OVER SOUTHEAST AND SOUTH CENTRAL LOUISIANA AND SOUTHERN MISSISSIPPI. THE ACTIVITY OVER SOUTHEAST LOUISIANA WAS STILL GENERALLY WEST OF LA KE MAUREPAS.
Special weather statement, Mar 17, 6:16 PM CST, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 615 PM CST TUE MAR 17 1987 ...THE TORNADO WATCH CONTINUES IN EFFECT FOR EAST BATON ROUGE AND SURROUNDING PARISHES UNTIL 10 PM... NO SEVERE WEATHER HAD BEEN REPORTED IN THE PAST HOUR. RADAR SHOWED A 20 MILE WIDE BAND OF STRONG THUNDERSTORMS FROM NEAR CLINTON IN EAST FELICIANA PARISH...TO BATON ROUGE CONTINUING SOUTHWEST ACROSS WEST BATON ROUGE AND IBERVILLE PARISHES. MOVEMENT WAS SOUTHEAST ABOUT 20 MPH. THEY WILL PRODUCE HEAVY RAIN WHICH WILL CAUSE SOME FLOODING OF STREETS...UNDERPASSES AND OTHER LOW AREAS... ESPECIALLY IN METROPOLITAN BATON ROUGE...FOR THE NEXT FEW HOURS. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARAE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Mar 17, 7:14 PM CST, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 715 PM CST TUE MAR 17 1987 ...THE TORNADO WATCH CONTINUES IN EFFECT FOR EAST BATON ROUGE AND SURROUNDING PARISHES UNTIL 10 PM... NO SEVERE WEATHER HAD BEEN REPORTED IN THE PAST HOUR. RADAR SHOWED STRONG THUNDERSTORMS FROM EAST FELICIANA...ST HELENA PARISHES SOUTH INTO EAST BATON ROUGE...LIVINGSTON...IBERVILLE AND ASCENSION PAEISHES. THE THUNDERSTORMS WERE MOVING SLOWLY TO THE EAST ...PRODUCEING HEAVY RAIN AND STRONG GUSTY WIND. THE HEAVY RAIN WILL CAUSE FLOODING OF STREETS...UNDERPASSES AND OTHER LOW AREAS FOR THE NEXT FEW HOURS. 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 THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Mar 17, 7:30 PM CST, 55 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 730 PM CST TUE MAR 17 1987 ...THE TORNADO WATCH IS CANCELLED FOR EAST BATON ROUGE...EAST FELICIANA IBERVILLE...POINTE COUPEE...WEST BATON ROUGE...AND WEST FELICIANA PARISHES. THE TORNADO WATCH REMAINS IN EFFECT FOR ASCENSION...ST HELENA...AND LIVINGSTON PARISHES AS WELL AS OTHER PARTS OF SOUTHEAST LOUISIANA UNTIL 10 PM... RADAR SHOWED STRONG THUNDERSTORMS FROM ST HELENA PARISH SOUTH INTO LIVINGSTON AND ASCENSION. THE THUNDERSTORMS WERE MOVING EAST AT 20 MPH AND WILL PRODUCE HEAVY RAIN AND STRONG GUSTY WINDS. THE HEAVY RAIN WILL CAUSE FLOODING OF STREETS...UNDERPASSES AND OTHER LOW AREAS FOR NEXT FEW HOURS. OTHER THUNDERSTORMS AND PATCHES OF RAIN COVERED PARTS OF EAST CENTRAL LOUISIANA. 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 THREATENING 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 |
|---|---|---|---|---|
| Mar 17, 9:09 PM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 66 min |
Nearby
Tornado Warnings in Louisiana, 1987Every tornado warning in 1987Tornadoes 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.