Alert archive / Mississippi / Flash Flood Warnings in 1998

Flash Flood Warning 11, NWS New Orleans, LA

January 7, 1998Harrison County, Jackson County, Mississippi

NWS New Orleans, LA issued this flash flood warning at Jan 7, 1998, 4:25 AM CST for Harrison County, Jackson County, 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: Jan 7, 1998, 4:25 AM CST (10:25 UTC)
Expired: Jan 7, 1998, 7:30 AM CST
In force: 3 hr
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Harrison County, MS, Jackson County, MS

The radar

The Mobile radar (KMOB), 64 km from the middle of the area, began a volume at 10:26 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, 10.4 hours before the alert went out and 84 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: 4 J/kg
Mixed-layer CIN: -252 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 319 m²/s²
0-3 km storm-relative helicity: 407 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 071026
FFWNEW
MSC047-059-071330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
425 AM CST WED JAN 7 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 730 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHERN MISSISSIPPI

   ...HARRISON COUNTY
   ...JACKSON COUNTY

AT 420 AM CST...DOPPLER RADAR INDICATED BANDS OF STRONG
THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OF 2 INCHES PER
HOUR ACROSS JACKSON COUNTY WITH ADDITIONAL AREAS OF HEAVY RAIN
APPROACHING THE MISSISSIPPI COAST FROM THE SOUTHWEST. IN HARRISON
COUNTY...RADAR ESTIMATED 1 TO 2 INCHES OF RAIN ACROSS THE WESTERN
PORTION OF THE COUNTY SINCE MIDNIGHT. STRONG THUNDERSTORMS OVER
JACKSON COUNTY AND ADDITIONAL HEAVY RAINS OVER HARRISON COUNTY WILL
CAUSE FLOODING OF LOW LYING AREAS...ROADS...AND SOME RESIDENCES.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
RO,ADWAY. 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
Jan 6, 9:57 PM CST	Flash Flood Warning	LIX	Amite	4 hr
Jan 6, 9:57 PM CST	Flash Flood Warning	LIX	Pike	4 hr
Jan 6, 9:57 PM CST	Flash Flood Warning	LIX	Wilkinson	4 hr
Jan 7, 1:13 AM CST	Severe Thunderstorm Warning	LIX	Hancock	32 min
Jan 7, 1:42 AM CST	Flash Flood Warning	LIX	Hancock, Pearl River	3 hr
Jan 7, 3:42 AM CST	Severe Thunderstorm Warning	LIX	Harrison	48 min
Jan 7, 5:09 AM CST	Flash Flood Warning	LIX	Pearl River	116 min
Jan 7, 7:30 AM CST	Flash Flood Warning	LIX	Harrison, Jackson	90 min

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; radar from the NEXRAD Level II archive.