Alert archive / Georgia / Flash Flood Warnings in 1999

Flash Flood Warning 59, NWS Birmingham, AL

August 12, 1999Chattahoochee County, Muscogee County, Georgia

NWS Birmingham, AL issued this flash flood warning at Aug 12, 1999, 8:21 PM EDT for Chattahoochee County, Muscogee County, Georgia. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 12, 1999, 8:21 PM EDT (00:21 UTC)
Expired
Aug 12, 1999, 11:25 PM EDT
In force
3 hr
Issued by
NWS Birmingham, AL
Area
Whole counties

Counties Chattahoochee County, GA, Muscogee County, GA

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 0.4 hours before the alert went out and 200 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, Birmingham, AL at 00:00Z on 1999-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1947 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, Birmingham, AL at 00:00Z on 1999-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 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
1947 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
1650 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
29 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 KBHM 130019
FFWBHM
GAC053-215-130325-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
721 PM CDT THU AUG 12 1999

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A...

* FLASH FLOOD WARNING FOR...
  CHATTAHOOCHEE COUNTY... IN WEST CENTRAL GEORGIA.
  MUSCOGEE COUNTY... IN WEST CENTRAL GEORGIA.

* UNTIL 1125 PM EDT (1025 PM CDT)

* AT 815 PM EDT... SPOTTERS INDICATED A THUNDERSTORM WITH VERY HEAVY
  RAIN OVER THE COLUMBUS GEORGIA AREA... MOVING SLOWLY WEST.

* AREA STORM SPOTTERS HAVE REPORTED STREET FLOODING IN THE CITY OF
COLUMBUS.

* DOPPLER RADAR HAS ALSO INDICATED OVER 6 INCHES OF RAIN HAS FALLEN
OVER PORTIONS OF CHATTAHOOCHEE AND MUSCOGEE COUNTIES.

DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT SzTAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IT IS VERY DIFFICULT
AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT
DRIVE THROUGH WATER OF UNKNOWN DEPTH.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 8:23 PM EDTSevere Thunderstorm WarningBMXChattahoochee, Muscogee32 min

Nearby

Flash Flood Warnings in Georgia, 1999Every flash flood warning in 1999

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.