Alert archive / Louisiana / Flash Flood Warnings in 1987
Flash Flood Warning 5, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Nov 16, 1987, 12:40 PM CST for Catahoula Parish, Concordia Parish, Louisiana. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Nov 16, 1987, 12:40 PM CST (18:40 UTC)
- Expired
- Nov 16, 1987, 5:00 PM CST
- In force
- 4 hr
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Catahoula Parish, LA, Concordia 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
Jackson, MS (KJAN), launched 12:00Z, 6.7 hours before the alert went out and 178 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
- 166 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 707 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 412 m²/s²
- 0-3 km storm-relative helicity
- 733 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBTR 161842
FFWBTR
LAC025-029-162300-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BATON ROUGE LA
1240 PM CST MON NOV 16 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 5 PM CST FOR PEOPLE IN THE FOLLOWING PARISH...
IN EAST CENTRAL LOUISIANA
...CATAHOULA...CONCORDIA
RADARS SHOWED THUNDERSTORMS WITH VERY HEAVY RAINS ARE MOVING THROUGH
CATAHOULA AND CONCORDIA PARISHS. HEAVY RAINS WITH THESE THUNDERSTORMS
WILL PRODUCE ADDITIONAL FLOODING IN THESE PARISHES FOR THE NEXT SEVERAL
HOURS.
FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.What forecasters said that day
The local office's own words before this flash flood 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, 9:46 AM CST, 2 hours 54 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 945 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 930 AM CST NO SEVERE WEATHER HAD BEEN REPORTED FROM THESE PARISHES. RADAR WAS SHOWING THUNDERSTORMS FROM VICKSBURG MISSISSIPPI SOUTH ALONG THE MISSISSIPPI RIVER TO THE SIMMSPORT LOUISIANA AREA. PATCHY LIGHT RAIN CONTINUED FROM THE MONTICELLO MISSISSIPPI AREA SOUTH JUST EAST OF MC COMB MISSISSIPPI TO NEAR BOGALUSA LOUISIANA.
Special weather statement, Nov 16, 9:57 AM CST, 2 hours 43 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, 1 hour 59 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 6 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 5 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, 29 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...
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, 12:55 PM CST | Severe Thunderstorm Warning | LIX | Concordia, Pointe Coupee, West Feliciana | 65 min |
| 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
Flash Flood Warnings in Louisiana, 1987Every flash flood 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.