Alert archive / Mississippi / Flash Flood Warnings in 1998

Flash Flood Warning 46, NWS New Orleans, LA

September 28, 19984 counties in Mississippi

NWS New Orleans, LA issued this flash flood warning at Sep 28, 1998, 7:18 AM CDT for 4 counties in Mississippi. It was in force for 3 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: Sep 28, 1998, 7:18 AM CDT (12:18 UTC)
Expired: Sep 28, 1998, 10:10 AM CDT
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.3 hours before the alert went out and 57 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: 884 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 281216
FFWNEW
MSC045-047-059-109-281510-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
718 AM CDT MON SEP 28 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A...

* FLASH FLOOD WARNING FOR
   - PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI
   - HANCOCK COUNTY IN SOUTHERN MISSISSIPPI
   - HARRISON COUNTY IN SOUTHERN MISSISSIPPI
   - JACKSON COUNTY IN SOUTHERN MISSISSIPPI

* UNTIL 1010 AM CDT

* HEAVY RAINFALL ASSOCIATED WITH INTENSE THUNDERSTORM ACTIVITY
  AROUND HURRICANE GEORGES. REPORTS FROM EMERGENCY MANAGEMENT
  OFFICIALS IN   JACKSON COUNTY INDICATE SOME LOCATIONS HAVE
  RECEIVED 9 TO 15 INCHES OF RAINFALL OVERNIGHT. A REPORT FROM
  GULFPORT HARBOR INDICATES OVER 18 INCHES OF RAINFALL OCCURRED
  OVERNIGHT. THIS HEAVY RAINFALL HAS EXPANDED WESTWARD INTO HARRISON
  COUNTY IN THE PAST 4 TO 5 HOURS. THIS ACTIVITY IS EXPECTED TO
  EXPAND OR MOVE FURTHER WESTWARD INTO HANCOCK AND PEARL RIVER
  COUNTIES SHORTLY.

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
Sep 28, 2:58 AM CDT	Flash Flood Warning	LIX	Harrison, Jackson	4 hr
Sep 28, 3:24 AM CDT	Tornado Warning	LIX	Jackson	31 min
Sep 28, 3:35 AM CDT	Tornado Warning	LIX	Harrison	20 min
Sep 28, 4:34 AM CDT	Tornado Warning	LIX	Harrison, Jackson	31 min
Sep 28, 6:47 AM CDT	Tornado Warning	LIX	Harrison	28 min
Sep 28, 8:38 AM CDT	Tornado Warning	LIX	Hancock	32 min
Sep 28, 8:53 AM CDT	Tornado Warning	LIX	Harrison	32 min
Sep 28, 10:37 AM CDT	Flash Flood Warning	LIX	Hancock, Harrison, Pearl River	7 hr
Sep 28, 10:37 AM CDT	Flash Flood Warning	LIX	Jackson	7 hr

Nearby

Flash Flood Warnings in Mississippi, 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.