Alert archive / Alabama / Flash Flood Warnings in 1989

Flash Flood Warning 18, NWS Birmingham, AL

October 1, 1989Madison County, Alabama

NWS Birmingham, AL issued this flash flood warning at Oct 1, 1989, 11:35 AM CDT for Madison County, Alabama. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Oct 1, 1989, 11:35 AM CDT (16:35 UTC)
Expired
Oct 1, 1989, 3:30 PM CDT
In force
4 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

County Madison 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

Nashville Metro, TN (KBNA), launched 12:00Z, 4.6 hours before the alert went out and 152 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, Nashville Metro, TN at 12:00Z on 1989-10-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 132 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, Nashville Metro, TN at 12:00Z on 1989-10-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 square meters per square second.193958Sfc1 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
132 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
539 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
70 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 KHSV 011634
FFWHSV
ALC089-012030-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1135 AM CDT SUN OCT 1 1989
 
THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  330 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTH ALABAMA
          ...MADISON
 
HEAVY RAIN HAS BEEN FALLING IN THE HUNTSVILLE AREA WITH OVER AN INCH
OF RAIN RECORDED AT THE NATIONAL WEATHER SERVICE OFFICE DURING THE
PAST TWO HOURS HUNTSVILLE POLICE DEPT. REPORTS STREET FLOODING THROUGH
OUT THE CITY AND SOME ROADS MAY NEED TO BE CLOSED. ALSO IN
SOME AREAS OF THE CITY THE WATHER WAS RISING AND MAY ENTER SOME HOMES.
 
 
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.

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, Oct 1, 6:09 AM CDT, 5 hours 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
608 AM CDT SUN OCT 1 1989

THUNDERSTORMS PRODUCING HEAVY DOWNPOURS MOVING ACROSS SECTIONS OF NORTH
AND CENTRAL ALABAMA.

AT 605 AM CDT THE THUNDERSTORMS WERE LOCATED BETWEEN ONEONTA AND
GADSDEN MOVING TOWARDS GUNTERSVILLE...AND IN THE BIRMINGHAM METRO AREA
MOVING NORTH TOWARDS WARRIOR AND CULLMAN.

BESIDES LIGHTNING AND HEAVY RAIN...THE STORMS MAY ALSO PRODUCE SOME
HAIL.

OTHERWISE...WIDESPREAD RAIN COVERED MOST OF EAST CENTRAL ALABAMA WHILE
THE RAIN WAS MORE PATCHY OVER THE WEST CENTRAL COUNTIES.

DUE TO THE HEAVY RAIN IN A SHORT PERIOD OF TIME...PERSONS NEED TO BE
AWARE FOR POSSIBLE FLOODING OF STREETS AND LOW LYING AREAS.#
Special weather statement, Oct 1, 6:52 AM CDT, 4 hours 43 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MONTGOMERY AL
650 AM CDT SUN OCT 1 1989

AT 640 AM CDT RADAR SHOWED THUNDERSTORMS WITH HEAVY RAIN MIXED IN A
WIDESPREAD AREA OF MOSTLY LIGHT TO MODERATE RAIN OVER SOUTH CENTRAL
AND SOUTHEAST ALABAMA. THE THUNDERSTORMS WITH THE HEAVY RAIN WERE OVER
ELMORE...LOWNDES AND MACON COUNTIES. MOVEMENT WAS NORTH AT AROUND 35
MPH.

POSSIBLE LOCALIZED FLOODING MAY OCCUR IN SOME OF THESE AREAS AS
RAINFXALL AMOUNTS OF ONE TO TWO INCHES HAVE FALLEN IN A SHORT PERIOD
OF TIME...ESPECIALLY IN TALLAPOOSA AND ELMORE COUNTIES.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 1, 12:17 PM CDTFlash Flood WarningBMXLimestone, Madison4 hr

Nearby

Flash Flood Warnings in Alabama, 1989Every flash flood warning in 1989

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.