Alert archive / Alabama / Flash Flood Warnings in 1989

Flash Flood Warning 16, NWS Mobile, AL

June 20, 1989Montgomery County, Alabama

NWS Mobile, AL issued this flash flood warning at Jun 20, 1989, 12:37 PM CDT for Montgomery County, Alabama. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 12:37 PM CDT (17:37 UTC)
Expired
Jun 20, 1989, 2:45 PM CDT
In force
2 hr
Issued by
NWS Mobile, AL
Area
Whole counties

County Montgomery 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

Centreville/Bibb, AL (KCKL), launched 12:00Z, 5.6 hours before the alert went out and 120 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, Centreville/Bibb, AL at 12:00Z on 1989-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Centreville/Bibb, AL at 12:00Z on 1989-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
780 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
27 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 KMGM 201742
FFWMGM
ALC051-101-123-201945-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
1237 PM CDT TUE JUN 20 1989
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  245 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH ALABAMA
          ...ELMORE...MONTGOMERY...TALLAPOOSA
 
WEATHER RADAR AT MONTGOMERY SHOWS THAT THUNDERSTORMS WITH HEAVY RAIN
CONTINUES TO MOVE IN A TRAIN OVER PARTS OF MONTGOMERY...ELMORE AND
TALLAPOOSA COUNTIES. MONTGOMERY HAS RECEIVED ANOTHER ONE HALF INCH
OF RAIN IN THE PAST HOUR WITH HIGHER AMOUNTS OVER THE MONTGOMERY
COUNTY AREA. HEAVIER AMOUNTS HAVE BEEN FALLING IN ELMORE COUNTY.
TALLAPOOSA COUNTY IS ONCE AGAIN EXPERIENCING SOME FLOODING OF ROADS
AND LOW LYING AREAS.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOBME KILLERS IN HEAVY RAINS.  CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

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, Jun 20, 10:46 AM CDT, 1 hour 51 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE PENSACOLA FL
1035 AM CDT MON JUN 19 1989

...THUNDERSTORMS WITH VERY HEAVY RAIN WERE OVER NORTHWEST FLORIDA AND
THE COASTAL WATERS...

AT 1030 AM CDT...THUNDERSTORMS...SOME WITH VERY HEAVY RAINS AND GUSTY
WINDS...WERE OVER THE FLORIDA PANHANDLE AND THE ADJOINING COASTAL
WATERS.
THE THUNDERSTORMS WITH THE HEAVIER RAINS WERE ALONG THE COAST FROM EAST
OF PENSACOLA TO AROUND DESTIN...NEAR MILTON...AND NEAR DE FUNIAK
SPRINGS.
THE THUNDERSTORMS WERE MOVING EAST-NORTHEAST AT 20 MILES AN HOUR.

OTHER THUNDERSTORMS...A FEW WITH HEAVY RAIN...WERE SCATTERED OVER THE
FLORIDA PANHANDLE...SOUTH ALABAMA...AND OVER THE GULF TO 100 MILES FROM
PASCAGOULA MISSISSIPPI TO PORT ST JOE FLORIDA.

THE THUNDERSTORMS WILL PRODUCE HEAVY DOWNPOURS CAUSING SOME STREET
AND POOR DRAINAGE AREA FLOODING...FREQUENT LIGHTNING...POSSIBLE SMALL
HAIL...GUSTY WINDS AND ROUGH SEAS...ALSO CONDITIONS MrAY FAVOR THE
DEVELOPMENT OF WATERSPOUTS FOR THE NEXT FEW HOURS.
PERSONS SHOULD TAKE ANY NECESSARY PRECAUTIONS FOR THESE CONDITIONS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 12:37 PM CDTFlash Flood WarningMOBElmore, Tallapoosa2 hr
Jun 20, 12:55 PM CDTSevere Thunderstorm WarningMOBHouston65 min

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.