Alert archive / Louisiana / Flash Flood Warnings in 1987
Flash Flood Warning 4, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Nov 16, 1987, 8:15 AM CST for Catahoula Parish, Louisiana. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Nov 16, 1987, 8:15 AM CST (14:15 UTC)
- Expired
- Nov 16, 1987, 12:15 PM CST
- In force
- 4 hr
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Catahoula 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, 2.3 hours before the alert went out and 182 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 161420
FFWBTR
LAC025-161815-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BATON ROUGE LA
815 AM CST MON NOV 16 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1215 PM CDT FOR PEOPLE IN THE FOLLOWING PARISH...
IN EAST CENTRAL LOUISIANA
...CATAHOULA
THUNDERSTORMS WITH VERY HEAVY RAINS ARE MOVING THROUGH CATAHOULA
PARISH. MORE THAN 8 INCHES OF RAIN WAS RECORDED DURING THE NIGHT
AT THE CATAHOULA WILDLIFE REFUGE. HEAVY RAINS WILL CONTINUE DURING
THE DAY.
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 SPOT*S 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, 5:30 AM CST, 2 hours 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 530 AM CST MON NOV 16 1987 ...VIOLENT WEATHER EXPECTED TO CONTINUE ACROSS LOUISIANA TODAY... AN UNUSUALLY TURBULENT LOW PRESSURE SYSTEM MOVING EASTWARD FROM TEXAS IS EXPECTED TO TOUCH OFF A VARIETY OF VIOLENT WEATHER ACROSS LOUISIANA TODAY. LAST NIGHT AND EARLY THIS MORNING SEVERE THUNDERSTORMS DUMPED HEAVY RAINFALL AND SPAWNED A NUMBER OF TORNADOES IN EAST TEXAS AND OVER NORTH AND WEST LOUISIANA. SOME FLASH FLOODING IS OCCURRING IN NORTHWEST LOUISIANA WHERE OVERNIGHT RAINS RANGED UP TO 5 INCHES. A FLASH FLOOD WATCH IS POSTED FOR ALL EXCEPT THE SOUTHEASTERN PARISHES FOR TODAY. AN ADDITIONAL 3 TO 5 INCHES OF RAIN ARE POSSIBLE AS THUNDERSTORMS CONTINUE TO DEVELOP OVER ALREADY SATURATED GROUND. LOCALLY SEVERE THUNDERSTORMS ARE EXPECTED TO PERSIST OVER WEST AND NORTH LOUISIANA AND SPREAD EASTWARD ACROSS THE REMAINDER OF THE STATE TODAY ENDING IN THE SOUTHEAST THIS EVENING. RESIDENTS OF LOUISIANA ARE ADVISED TO REMAIN ON THE ALERT TODAY AND BE PREPARED TO TAKE SAFETY PRECAUTIONS IN THE EVENT THAT SEVERE WEATHER THREATENS. STAY TUNED TO NOAA WEATHER RADIO OR MONITOR LOCAL RADIO AND TELEVISION STATIONS DURINGE THE COURSE OF THIS POTENTIALLY DANGEROUS WEATHER SITUATION.
Special weather statement, Nov 16, 7:14 AM CST, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 710 AM CST MON NOV 16 1987 RADAR SHOWED A 25 MILE WIDE SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN FROM CONCORDIA PARISH ACROSS AVOYELLES INTO ST LANDRY. THE LINE OF VERY STRONG THUNDERSTORMS WAS MOVING TO THE SOUTHEAST AT 10 MPH. THESE STRONG THUNDERSTORMS WILL PRODUCE HEAVY RAINS AND STRONG GUSTY WINDS ACROSS EAST CENTRAL LOUISIANA INCLUDING THE METROPOLITAN BATON ROUGE DURING THE NEXT SEVERAL HOURS. PEOPLE THROUGHOUT THE AREA SHOULD BE PREPARED FOR SEVERE WEATHER UNTIL THE THUNDERSTORMS PASS YOUR AREA. ...A FLASH FLOOD WATCH IS IN EFFECT TODAY FOR AVOYELLES...CATAHOULA... AND CONCORDIA PARISHES IN EAST CENTRAL.
Special weather statement, Nov 16, 7:57 AM CST, 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 800 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... RADAR SHOWED A 25 MILE WIDE SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN FROM CONCORDIA PARISH ACROSS AVOYELLES INTO ST LANDRY. THE LINE OF THUNDERSTORMS WAS MOVING TO THE SOUTHEAST AT 5 MPH. THESE STRONG THUNDERSTORMS WILL PRODUCE HEAVY RAINS AND STRONG GUSTY WINDS ACROSS EAST CENTRAL LOUISIANA INCLUDING THE METROPOLITAN BATON ROUGE DURING THE NEXT SEVERAL HOURS. THE CATAHOULA PARISH SHERIFFS OFFICE REPORTED MINOE FLOODING IN HARRISONBURG DURING THE PAST FEW HOURS. PEOPLE THROUGHOUT THE AREA SHOULD BE PREPARED FOR SEVERE WEATHER UNTIL THE THUNDERSTORMS PASS YOUR AREA. ...A FLASH FLOOD WATCH IS IN EFFECT TODAY FOR PARTS OF LOUISIANA INCLUDING AVOYELLES...CATAHOULA...AND CONCORDIA 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, 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 | 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.