Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 35, NWS New Orleans, LA

November 16, 1987Concordia Parish, Pointe Coupee Parish, West Feliciana Parish, Louisiana

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

TimeReportWhereRemark
Nov 16, 1:00 PM CSTTornado F1Concordia, LA
Nov 16, 1:45 PM CSTThunderstorm Wind 0Pointe Coupee, LA
Nov 16, 1:50 PM CSTThunderstorm Wind 0West 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.

Skew-T log-pSkew-T log-p diagram, Lake Charles Mun, LA at 12:00Z on 1987-11-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1739 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 1987-11-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 323 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
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

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Nov 15, 10:45 PM CSTSevere Thunderstorm WarningLIXAvoyelles, Catahoula, Concordia60 min
Nov 16, 12:00 AM CSTSevere Thunderstorm WarningLIXCatahoula, Concordia60 min
Nov 16, 8:15 AM CSTFlash Flood WarningLIXCatahoula4 hr
Nov 16, 12:20 PM CSTSevere Thunderstorm WarningLIXAvoyelles, Saint Landry70 min
Nov 16, 12:40 PM CSTFlash Flood WarningLIXCatahoula, Concordia4 hr
Nov 16, 12:55 PM CSTSevere Thunderstorm WarningLIXIberville65 min
Nov 16, 2:15 PM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Iberville, West Baton Rouge60 min
Nov 16, 2:52 PM CSTSevere Thunderstorm WarningLIXLivingston, Saint Helena53 min
Nov 16, 2:52 PM CSTSevere Thunderstorm WarningLIXAscension53 min
Nov 16, 3:02 PM CSTSevere Thunderstorm WarningLIXAssumption, Iberia, Saint Martin, St. Mary58 min
Nov 16, 3:50 PM CSTSevere Thunderstorm WarningLIXAscension, Livingston40 min
Nov 16, 4:37 PM CSTTornado WarningLIXWashington68 min
Nov 16, 5:52 PM CSTTornado WarningLIXLafourche, Saint Charles68 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.