Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 35, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Nov 16, 1987, 12:55 PM CST for Concordia Parish, Pointe Coupee Parish, West Feliciana Parish, Louisiana. It was in force for 65 min. 3 reports 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
- Nov 16, 1987, 12:55 PM CST (18:55 UTC)
- Expired
- Nov 16, 1987, 2:00 PM CST
- In force
- 65 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Concordia Parish, LA, Pointe Coupee Parish, LA, West Feliciana Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 16, 1:00 PM CST | Tornado F1 | Concordia, LA | |
| Nov 16, 1:45 PM CST | Thunderstorm Wind 0 | Pointe Coupee, LA | |
| Nov 16, 1:50 PM CST | Thunderstorm Wind 0 | West Feliciana, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.9 hours before the alert went out and 186 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
- 1739 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 554 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 323 m²/s²
- 0-3 km storm-relative helicity
- 366 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 12.0
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 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, Nov 16, 9:57 AM CST, 2 hours 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 955 AM CST MON NOV 16 1987 ....A TORNADO WATCH IS IN EFFECT FOR PEOPLE IN AVOYELLES...CATAHOULA... CONCORDIA...IBERVILLE...POINTE COUPEE...ST LANDRY...AND WEST FELICIANA UNTIL 2 PM CST... ...A FLASH FLOOD WARNING IS IN EFFECT FOR CATAHOULA PARISH UNTIL 1215 PM CST...WITH REPORTS IN EXCESS OF 10 INCHES OF RAIN. RADAR SHOWED A 25 MILE WIDE BAND OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN FROM CATAHOULA AND CONCORDIA PARISHES ACROSS AVOYELLES INTO ST LANDRY PARISH. OTHER VERY STRONG THUNDERSTORMS HAVE DEVELOPED OVER POINTE COUPEE AND WEST FELICIANA PARISHES. THE BAND OF THUNDERSTORMS WAS MOVING SLOWLY SOUTHEAST. HEAVY RAINS AND STRONG GUSTY WINDS WILL OCCUR WITH THESE THUNDERSTORMS IN THE ABOVE PARISHES FOR THE NEXT SEVERAL HOURS...AND ACROSS THE REMAINDER OF EAST CENTRAL LOUISIANA THIS AFTERNOON AND EVENING. ...A FLASH FLOOD WATCH IS IN EFFECT FOR A LARGE PART OF LOUISIANA... INCLUDING AVOYELLES...CATAHOULA...CONCORDIA...AND ST LANDRY PARISHES.
Special weather statement, Nov 16, 10:41 AM CST, 2 hours 14 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 1045 AM CST MON NOV 16 1987 ...TORNADO WATCH IN EFFECT FOR ASSUMPTION LOWER ST MARTIN ST MARY AND ADJOINING COASTAL WATERS IN SOUTHEAST LOUISIANA UNTIL 2 PM CST... AT 1030 AM CST NO SEVERE WEATHER HAD BEEN REPORTED FROM THESE PARISHES. RADAR WAS SHOWING VERY STRONG THUNDERSTORMS FROM VICKSBURG MISSISSIPPI SOUTH ALONG THE MISSISSIPPI RIVER TO NATCHEZ AND EXTENDING WEST INTO CENTRAL LOUISIANA BETWEEN ALEXANDRIA AND MONROE. SCATTERED SHOWERS WERE OCCURRING BETWEEN MC COMB AND HATTIESBURG IN SOUTH CENTRAL MISSISSIPPI. THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.
Special weather statement, Nov 16, 11:34 AM CST, 1 hour 21 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 1130 AM CST MON NOV 16 1987 ...DANGEROUS WEATHER SITUATION CONTINUES TO DEVELOP AND SPREAD SLOWLY EASTWARD ACROSS LOUISIANA... VERY UNSTABLE ATMOSPHERIC CONDITIONS OVER THE BAYOU STATE TODAY WILL CONTINUE TO MAKE CONDITIONS FAVORABLE FOR SEVERE THUNDERSTORMS AND POSSIBLE TORNADOES THROUGH THIS AFTERNOON AND SOUTHEAST PORTION INTO THE EARLY NIGHTTIME HOURS. SEVERE WEATHER WAS REPORTED OVER PORTIONS OF NORTHERN AND WESTERN LOUISIANA LAST NIGHT INTO THIS MORNING INCLUDING EXCESSIVE RAINS WHICH CAUSED SIGNIFICANT FLOODING IN SOME SECTIONS. THE GREATEST THREAT OF SEVERE WEATHER IS FROM SOUTHWEST LOUISIANA NORTHEASTWARD INTO NORTHEAST SECTIONS THROUGH EARLY AFTERNOON. THREAT OF SEVERE WEATHER WILL INCREASE EASTWARD THROUGH SOUTHCENTRAL AND SOUTHEAST LOUISIANA THIS AFTERNOON AND CONTINUE IN SOUTHEAST SECTIONS EARLY TONIGHT. THIS OUTBREAK OF SEVERE WEATHER INCLUDING VERY HEAVY RAINFALL IS ASSOCIATED WITH A STRONG COLD FRONT AND ASSOCIATED DEEP COLD TROUGH ALOFT NOW MOVING EASTWARD THROUGH TEXAS. THIS IS A VERY DANGEROUS STORM SYSTEM AND PERSONS ARE ADVISED TO KEEP ABREAST OF THE LATEST WARNINGS...WATCHES AND STATEMENTS ISSUED BY LOCAL WEATHER SERVICE OFFICES. PRECAUTIONS TO PROTECT LIFE AND PROPERTY SHOULD BE TAKEN IMMEDIATELY. FLASH FLOOD WATCHES CONTINUE OVER NORTHERN AND WESTERN LOUISIANA THROUGH THIS AFTERNOON WITH PORTIONS OF THE STATE UNDER A TORNADO WATCH THROUGH EARLY THIS AFTERNOON WITH ADDITIONAL SEVERE WEATHER WATCHES LIKELY THIS AFTERNOON. ALSO...AHEAD OF THE COLD FRONT TIDES WILL INCREASE TO ABOVE NORMAL ALONG THE LOUISIANA COAST THIS AFTERNOON CONTINUING INTO THE EVENING HOURS ALO@NG THE SOUTHEAST LOUISIANA COAST.
Special weather statement, Nov 16, 11:35 AM CST, 1 hour 20 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 1145 AM CST MON NOV 16 1987 ...TORNADO WATCH IN EFFECT FOR ASSUMPTION LOWER ST MARTIN ST MARY AND ADJOINING COASTAL WATERS IN SOUTHEAST LOUISIANA UNTIL 2 PM CST... WIDELY SCATTERED SHOWERS WERE OCCURRING FROM ATCHAFALAYA BAY NORTHEAST ACROSS HAMMOND TO BOGALUSA LOUISIANA. SCATTERED STGRONG THUNDERSTORMS WERE OCCURRING FROM JUST EAST OF VICKSBURG SOUTHWESAT ACROSS ALEXANDRIA LOUISIANA INTO EAST TEXAS. THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.
Special weather statement, Nov 16, 12:11 PM CST, 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1215 PM CST MON NOV 16 1987 ....A TORNADO WATCH IS IN EFFECT FOR ALL OF EAST CENTRAL LOUISIANA UNTIL 8 PM THIS MONDAY EVENING... RADAR SHOWED THE THUNDERSTORMS ACROS EAST CENTRAL LOUISIANA HAS DECREASED DURING THE PAST HOUR. HOWEVER...THUNDERSTORMS ARE DEVELOPING WEST OF THE AREA AND WILL MOVE EASTWARD ACROSS ALL OF EAST CENTRAL LOUISIANA DURING THE AFTERNOON AND EVENING. THUNDERSTORMS WILL PRODUCE HEAVY RAINS AND STRONG GUSTY WINDS OVER ALL OF EAST CENTRAL LOUISIANA THIS AFTERNOON AND EVENING. WIND GUST TO 46 MPH WAS RECORDED AT RYAN AIRPORT DURING THE PAST HOUR. PEOPLE IN EAST CENTRAL LOUISIANA SHOULD BE ALERT FOR SEVnERE WEATHER CONDITIONS FOR THE NEXT SEVERAL HOURS. ...A FLASH FLOOD WATCH IS IN EFFECT TODAY FOR A LARGE PART OF LOUISIANA INCLUDING AVOYELLES...CATAHOULA...CONCORDIA...AND ST LANDRY PARISHES...
Special weather statement, Nov 16, 12:47 PM CST, 8 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 1245 PM CST MON NOV 16 1987 ...TORNADO WATCH IN EFFECT FOR ASSUMPTION LOWER ST MARTIN ST MARY TANGIPAHOA AND WASHINGTON AND ADJOINING COASTAL WATERS OF THE THE FOLLOWING PARISHES IBERIA AND ST MARY. ISOLATED SHOWERS AND THUNDERSTORMS CONTINUED IN SOUTHWEST MISSISSIPPI EAST CENTRAL AND SOUTHCENTRAL LOUISIANA AND THE COASTAL AREA OF SOUTHEAST MISSISSIPPI. A SOLID LINE OF STRONG THUNDERSTORMS EXTENDED FROM MONROE LOUISIANA SOUTH ACROSS ALEXANDRIA TO JENNINGS LOUISIANA. THE LINE WAS MOVING EAST AT 30 MILES AN HOUR. THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 15, 10:45 PM CST | Severe Thunderstorm Warning | LIX | Avoyelles, Catahoula, Concordia | 60 min |
| Nov 16, 12:00 AM CST | Severe Thunderstorm Warning | LIX | Catahoula, Concordia | 60 min |
| Nov 16, 8:15 AM CST | Flash Flood Warning | LIX | Catahoula | 4 hr |
| Nov 16, 12:20 PM CST | Severe Thunderstorm Warning | LIX | Avoyelles, Saint Landry | 70 min |
| Nov 16, 12:40 PM CST | Flash Flood Warning | LIX | Catahoula, Concordia | 4 hr |
| Nov 16, 12:55 PM CST | Severe Thunderstorm Warning | LIX | Iberville | 65 min |
| Nov 16, 2:15 PM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, West Baton Rouge | 60 min |
| Nov 16, 2:52 PM CST | Severe Thunderstorm Warning | LIX | Livingston, Saint Helena | 53 min |
| Nov 16, 2:52 PM CST | Severe Thunderstorm Warning | LIX | Ascension | 53 min |
| Nov 16, 3:02 PM CST | Severe Thunderstorm Warning | LIX | Assumption, Iberia, Saint Martin, St. Mary | 58 min |
| Nov 16, 3:50 PM CST | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 40 min |
| Nov 16, 4:37 PM CST | Tornado Warning | LIX | Washington | 68 min |
| Nov 16, 5:52 PM CST | Tornado Warning | LIX | Lafourche, Saint Charles | 68 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.