Alert archive / Mississippi / Flash Flood Warnings in 1987

Flash Flood Warning 16, NWS Mobile, AL

August 14, 1987Harrison County, Jackson County, Mississippi

NWS Mobile, AL issued this flash flood warning at Aug 14, 1987, 5:00 PM CDT for Harrison County, Jackson County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 14, 1987, 5:00 PM CDT (22:00 UTC)
Expired
Aug 14, 1987, 8:00 PM CDT
In force
3 hr
Issued by
NWS Mobile, AL
Area
Whole counties

Counties Harrison County, MS, Jackson County, MS

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Boothville, LA (KBVE), launched 12:00Z, 10.0 hours before the alert went out and 134 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-pSkew-T log-p diagram, Boothville, LA at 12:00Z on 1987-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2780 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boothville, LA at 12:00Z on 1987-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -38 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2780 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-38 m²/s²
0-3 km storm-relative helicity
-18 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 KMOB 142152 RRA
FFWMOB
MSC059-047-150100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
500 PM CDT FRI AUG 14 1987

THE NATIONAL WEATHER SERVICE HAS EXTENDED THE FLASH FLOOD WARNING
UNTIL 800 PM CDT FOR PEOPLE IN HARRISON AND JACKSON COUNTIES IN
MISSISSIPPI.

AT 450 PM LIGHT TO MODERATE RAIN CONTINUED THROUGHOUT JACSKON AND
HARRISON COUNTIES.  HEAVIER RAIN TO THE NORTHWEST WAS MOVING TOWARD
THE SOUTHEAST.  THIS ADDITIONAL RAIN WILL AGGARAVATE THE FLOODING IN
HARRISON AND JACKSON COUNTIES THIS EVENING.

RIVERS AND STREAMS IN THE AREA ARE AT BANKFULL OR ABOVE AND MANY ROADS
REMAIN FLOODED...ESPECIALLY IN JACKSON COUNTY.

UNNECESSARY TRAVEL IS STILL DISC2OURAGED IN THESE COUNTIES.

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, Aug 14, 1:44 PM CDT, 3 hours 16 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
135 PM CDT FRI AUG 14 1987

A SPECIAL MARINE WARNING IS IN EFFECT UNTIL 215 PM CDT FOR THE COASTAL
WATERS OF ESCAMBIA...SANTA ROSA...AND OKALOOSA COUNTIES IN FLORIDA.

A SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN WAS PASSING
THROUGH THE COASTAL SECTIONS OF THE EXTREME WESTERN TIP OF THE FLORIDA
PANHANDLE. THE LINE EXTENDED FROM SOUTHERN BALDWIN COUNTY ALABAMA
EASTWARD TO PENSACOLA AND FORT WALTON BEACH. THESE STORMS WILL PRODUCE
FREQUENT LIGHTNING STRIKES...GUSTY WINDS...AND VERY HEAVY RAINFALL AS
THEY PASS SOUTHWARD THROUGH THESE AREAS.

DUE TO THE HEAVY RAINFALL AMOUNTS OF THE PAST DAYS...MUCH OF THE
PANHANDLE HAS SATURATED GROUNDS. SOME AREAS CAN EXPECT MINOR FLOODING
OF LOW AREAS FROM ACCUMULATED RUNOFF AND ADDITIONAL HEAVY DOWNPOURS.
WIDESPREAD LIGHT RAIN WITH SCATTERED STRONG THUNDERSTORMS INCLUDED WAS
OVER SOUTHEAST MISSISSIPPI...#SOUTHWEST ALABAMA...THE WESTERN FLORIDA
PANHANDLE AND THE GULF WATERS ADJACENT TO ALL OF THESE AREAS UP TO 100
MILES OFFSHORE. MOVEMENT WAS TO THE SOUTHEAST AT 15 TO 20 MPH.

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 14, 8:15 AM CDTFlash Flood WarningMOBJackson3 hr
Aug 14, 10:55 AM CDTFlash Flood WarningMOBJackson3 hr
Aug 14, 1:07 PM CDTFlash Flood WarningMOBHarrison, Stone4 hr
Aug 14, 2:20 PM CDTFlash Flood WarningMOBJackson3 hr

Nearby

Flash Flood Warnings in Mississippi, 1987Every flash flood warning in 1987

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.