Alert archive / Mississippi / Flash Flood Warnings in 1987

Flash Flood Warning 11, NWS Jackson, MS

August 13, 1987Marion County, Mississippi

NWS Jackson, MS issued this flash flood warning at Aug 13, 1987, 8:19 AM CDT for Marion County, Mississippi. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 13, 1987, 8:19 AM CDT (13:19 UTC)
Expired
Aug 13, 1987, 11:15 AM CDT
In force
3 hr
Issued by
NWS Jackson, MS
Area
Whole counties

County Marion 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

Jackson, MS (KJAN), launched 12:00Z, 1.3 hours before the alert went out and 124 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, Jackson, MS at 12:00Z on 1987-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 758 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jackson, MS at 12:00Z on 1987-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
758 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
531 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-21 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 KJAN 131319
FFWJAN
MSC091-131615-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE JACKSON MS
819 AM CDT THU AUG 13 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1115 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL MISSISSIPPI
          ...MARION
 
VERY HEAVY THUNDERSTORMS CONTINUE TO OCCUR OVER MARION COUNTY THIS
MORNING. THUNDERSTORMS ARE MOVING SOUTHEAST AT 15 MILES AN HOUR. MORE
VERY HEAVY THUNDERSTORMS NORTHWEST OF MARION COUNTY WILL MOVE INTO
THE COUNTY IN THE FEW 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.

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 13, 4:18 AM CDTFlash Flood WarningJANMarion4 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.