Alert archive / Alabama / Flash Flood Warnings in 1987

Flash Flood Warning 4, NWS Mobile, AL

May 10, 1987Baldwin County, Alabama

NWS Mobile, AL issued this flash flood warning at May 10, 1987, 1:30 PM CDT for Baldwin County, Alabama. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
May 10, 1987, 1:30 PM CDT (18:30 UTC)
Expired
May 10, 1987, 3:30 PM CDT
In force
2 hr
Issued by
NWS Mobile, AL
Area
Whole counties

County Baldwin County, AL

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, 6.5 hours before the alert went out and 217 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 1987-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1347 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, Boothville, LA at 12:00Z on 1987-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 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
1347 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
685 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
51 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 101823
FFWMOB
ALC003-102030-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOBILE AL
130 PM CDT SUN MAY 10 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  330 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH ALABAMA
          ...SOUTHERN BALDWIN
 
AT 125 PM CDT MOBILE RADAR INDICATED A VERY HEAVY THUNDERSTORM JUST
WEST OF GULFSHORES ALABAMA. THIS STORM IS MOVING VERY SLOWLY TOWARD
THE EAST. THE GROUND IS ALREADY SATURATED IN SOUTH BALDWIN COUNTY
FROM THE HEAVY RAINFALL WHICH OCCURED EARLIER TODAY.
 
 
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.

Nearby

Flash Flood Warnings in Alabama, 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.