Alert archive / Mississippi / Flash Flood Warnings in 1996

Flash Flood Warning 2, NWS New Orleans, LA

April 15, 1996Jackson County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Apr 15, 1996, 2:49 AM CDT for Jackson County, Mississippi. 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: Apr 15, 1996, 2:49 AM CDT (07:49 UTC)
Expired: Apr 15, 1996, 6:45 AM CDT
In force: 4 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

County Jackson County, MS

The radar

The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 07:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.8 hours before the alert went out and 106 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: 2003 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 554 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 218 m²/s²
0-3 km storm-relative helicity: 297 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 14.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 150749
FFWNEW
MSC045-047-059-109-151145-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
249 AM CDT MON APR 15 1996
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
FLASH FLOOD WARNING    EFFECTIVE UNTIL  645 AM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTH MISSISSIPPI
 
   ...HANCOCK COUNTY...HARRISON COUNTY...JACKSON COUNTY
   ...SOUTHERN PEARL RIVER COUNTY
 
AT 240 AM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
AN AREA OF STRONG THUNDERSTORMS OVER HANCOCK AND SOUTHERN HARRISON
COUNTIES. LATEST DOPPLAR RADAR RAINFALL ESTIMATES FROM THESE STORMS
INDICATES UP TO 5 INCHES OF RAIN HAS FALLEN OVER HANCOCK COUNTY DURING
THE LAST THREE HOURS. THIS ACTIVITY WAS MOVING EAST AT NEAR 30 MILES
PER HOUR WHICH WILL BRING THE HEAVIEST RAINFALL OVER EXTREME SOUTHERN
PORTIONS OF HARRISON AND JACKSON COUNTIES. ANOTHER 2 TO 4 INCHES OF
RAINFALL IS POSSIBLE OVER SOUTHERN SECTIONS OF HARRISON AND JACKSON
COUNTIES WHILE 1 TO 3 ADDITIONAL INCHES ARE POSSIBLE OVER HANCOCK AND
SOUTHERN PEARL RIVER COUNTIES. SHOWERS AND THUNDERSTORM ACTIVITY SHOULD
BEGIN TO ABATE IN THE NEXT 2 TO 4 HOURS.
 
A 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, Apr 15, 1:00 AM CDT, 1 hour 49 minutes before

LAZ050-038-150630-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1259 AM CDT MON APR 15 1996

...THE SEVERE THUNDERSTORM WARNING FOR TANGIPAHOA PARISH HAS BEEN
CANCELLED...

AT 1255 AM CDT...THE THUNDERSTORM THAT PROMPTED THE SEVERE THUNDERSTORM
WARNING FOR SOUTHERN TANGIPAHOA PARISH HAS WEAKENED AND MOVED OUT OF THE
AREA. THE SHERIFFS OFFICE REPORTED HAIL OF UNSPECIFIED SIZE EAST OF
PONCHATOULA AROUND 1230 AM. A TORNADO WA2TCH REMAINS IN EFFECT UNTIL 200
AM AND ADDITIONAL STRONG TO SEVERE THUNDERSTORMS MAY MOVE INTO THE
NORTH SHORE AREA OF LAKES MAUREPAS AND PONTCHARTRAIN THROUGH 200 AM.

&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 8:56 PM CDT	Severe Thunderstorm Warning	LIX	Pike	34 min
Apr 14, 9:01 PM CDT	Tornado Warning	LIX	Hancock, Pearl River	44 min
Apr 14, 10:08 PM CDT	Severe Thunderstorm Warning	LIX	Wilkinson	52 min
Apr 14, 10:36 PM CDT	Severe Thunderstorm Warning	LIX	Amite	69 min
Apr 15, 2:16 AM CDT	Severe Thunderstorm Warning	LIX	Hancock, Pearl River	29 min
Apr 15, 2:49 AM CDT	Flash Flood Warning	LIX	Hancock, Harrison, Pearl River	4 hr

Nearby

Flash Flood Warnings in Mississippi, 1996 Every flash flood warning in 1996

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; radar from the NEXRAD Level II archive.