Alert archive / Louisiana / Flash Flood Warnings in 1995

Flash Flood Warning 21, NWS New Orleans, LA

May 8, 1995Lafourche Parish, Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at May 8, 1995, 11:22 PM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: May 8, 1995, 11:22 PM CDT (04:22 UTC)
Expired: May 9, 1995, 1:30 AM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Lafourche Parish, LA, Terrebonne Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 4.4 hours before the alert went out and 128 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2084 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 3.3
Supercell composite: 15.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNEW 090428
FFWNEW
LAC057-109-090630- 
 
BULLETIN - EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE NEW ORLEANS LA 
1122 PM CDT MON MAY 8 1995 
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A 
FLASH FLOOD WARNING EFFECTIVE UNTIL MIDNIGHT CDT 
FOR RESIDENTS IN THE FOLLOWING LOCATIONS... 
 
IN SOUTHEAST LOUISIANA 
 
   ...NORTHERN LAFOURCHE PARISH...NORTHERN TERREBONNE PARISH 
 
SINCE 5 PM AT LEAST 8 TO 10 INCHES OF RAIN HAS FALLEN IN THE NORTH 
PORTION OF LAFOURCHE AND THE NORTH PORTION OF TERREBONNE PARISH. 
THE HEAVY RAINFALL HAS MOVED TO THE NORTHEAST WITH ONLY SCATTERED
SHOWERS AND A FEW THUNDERSTORMS IN THE AREA. RAINFALL ACTIVITY
SHOULD CONTINUE TO DIMINISH IN THE NEXT 1 TO 2 HOURS. FLOODING 
WILL ABATE AS WATER LEVELS DROP.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO 
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BnE 
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 8, 7:27 PM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Saint Charles	63 min
May 8, 7:27 PM CDT	Severe Thunderstorm Warning	LIX	Terrebonne	63 min
May 8, 10:44 PM CDT	Severe Thunderstorm Warning	LIX	Orleans, Saint Bernard	61 min
May 8, 11:43 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	62 min
May 8, 11:43 PM CDT	Severe Thunderstorm Warning	LIX	Orleans	62 min
May 8, 11:50 PM CDT	Flash Flood Warning	LIX	Jefferson, Saint Charles	4 hr
May 8, 11:50 PM CDT	Flash Flood Warning	LIX	Orleans, Plaquemines, Saint Bernard	4 hr
May 9, 12:36 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	69 min
May 9, 3:19 AM CDT	Flash Flood Warning	LIX	Saint Tammany	4 hr
May 9, 4:29 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	61 min
May 9, 7:08 AM CDT	Flash Flood Warning	LIX	Saint Tammany	4 hr
May 9, 7:21 AM CDT	Flash Flood Warning	LIX	Orleans, Plaquemines, Saint Bernard	4 hr
May 9, 7:21 AM CDT	Flash Flood Warning	LIX	Jefferson, Saint Charles	4 hr
May 9, 10:55 AM CDT	Flash Flood Warning	LIX	Saint Tammany	3 hr
May 9, 11:20 AM CDT	Flash Flood Warning	LIX	Jefferson, Saint Charles	4 hr
May 9, 11:20 AM CDT	Flash Flood Warning	LIX	Orleans	4 hr

Nearby

Flash Flood Warnings in Louisiana, 1995 Every flash flood warning in 1995

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.