Alert archive / Louisiana / Flash Flood Warnings in 1998

Flash Flood Warning 19, NWS New Orleans, LA

March 7, 1998Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this flash flood warning at Mar 7, 1998, 4:41 PM CST for Saint Bernard Parish, Louisiana. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 7, 1998, 4:41 PM CST (22:41 UTC)
Expired: Mar 7, 1998, 8:35 PM CST
In force: 4 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

County Saint Bernard Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.7 hours before the alert went out and 43 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 520 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 325 m²/s²
0-3 km storm-relative helicity: 480 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 072239
FFWNEW
LAC087-MSC045-047-059-080235-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
441 PM CST SAT MAR 7 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 835 PM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHEASTERN LOUISIANA

   ...ST BERNARD PARISH

IN SOUTHERN MISSISSIPPI

   ...HANCOCK COUNTY
   ...HARRISON COUNTY
   ...JACKSON COUNTY


AT 430 PM CST...RADAR INDICATED MODERATE RAINFALL OCCURRING OVER
THE COASTAL COUNTIES OF MISSISSIPPI. STRONG SOUTH WINDS ACROSS THE
GULF IS ALSO PILING WATER ONTO THE BEACHES...THUS INHIBITING
DRAINAGE. WITH ADDITIONAL HEAVY RAINFALL EXPECTED THIS EVENING AND
TONIGHT...ONGOING FLOODING WILL ONLY BE AGGRAVATED.

HANCOCK COUNTY OFFICIALS ARE URGING CITIZENS IN LOW LYING AREAS TO
MOVE ALL VEHICLES AND MOVABLE PERSONAL PROPERTY OUT OF FLOOD PRONE
AREAS AS SOON AS POSSIBLE...PARTICULARLY ACROSS THE SOUTHERN
PORTIONS OF THE COUNTY WHERE TIDAL FLOODING CAN BE A PROBLEM. SOME
FLOODING AS DEEP AS TWO FEET HAS BEEN REPORTED IN THE LAKESHORE AND
CLERMONT HARBOR AREAS. IF ASSISTANCE IS NEEDED PLEASE CONTACT THE
EMERGENCY OPERATIONS OFFICE AT AREA CODE 228...467-5101.

IN ST BERNARD PARISH LOUISIANA...COASTAL FLOODING MAY ALSO HINDER
DRAINAGE FROM HEAVY RAINS. AT 430 PM...RADAR INDICATED NO RAIN
WITHIN THE IMMEDIATE AREA...HOWEVER VERY STRONG THUNDERSTORMS WERE
INDICATED IN SOUTHEAST LOUISIANA THAT ARE EXPECTED TO MOVE INTO ST
BERNARD PARISH THIS EVENING. ANY ADDITIONAL RAINFALL WILL BE SLOW
TO DRAIN. FOR ADDITIONAL INFORMATION OR TO REQUEST
SANDBAGS...CONTACT THE EOC COMMAND CENTER AT 278-4485.
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 BE 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
Mar 7, 3:51 AM CST	Severe Thunderstorm Warning	LIX	Washington	59 min
Mar 7, 4:19 AM CST	Severe Thunderstorm Warning	LIX	Livingston	36 min
Mar 7, 4:24 AM CST	Tornado Warning	LIX	Saint Tammany	31 min
Mar 7, 4:56 AM CST	Tornado Warning	LIX	Ascension, Iberville	34 min
Mar 7, 5:07 AM CST	Tornado Warning	LIX	Saint Tammany	33 min
Mar 7, 5:51 AM CST	Severe Thunderstorm Warning	LIX	Saint James	34 min
Mar 7, 6:41 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	44 min
Mar 7, 8:10 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	35 min
Mar 7, 4:14 PM CST	Severe Thunderstorm Warning	LIX	Assumption	61 min
Mar 7, 4:20 PM CST	Severe Thunderstorm Warning	LIX	West Feliciana	30 min
Mar 7, 4:46 PM CST	Severe Thunderstorm Warning	LIX	Saint Charles, Saint John the Baptist	34 min
Mar 7, 5:00 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa, Washington	35 min
Mar 7, 5:44 PM CST	Severe Thunderstorm Warning	LIX	Terrebonne	61 min

Nearby

Flash Flood Warnings in Louisiana, 1998 Every flash flood warning in 1998

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.