Alert archive / Georgia / Flash Flood Warnings in 1997

Flash Flood Warning 24, NWS Atlanta, GA

November 21, 1997DeKalb County, Fulton County, Georgia

NWS Atlanta, GA issued this flash flood warning at Nov 21, 1997, 8:20 PM EST for DeKalb County, Fulton 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
Nov 21, 1997, 8:20 PM EST (01:20 UTC)
Expired
Nov 21, 1997, 11:00 PM EST
In force
3 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties DeKalb County, GA, Fulton County, GA

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 1.3 hours before the alert went out and 48 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, Peachtre/Fal Fld, GA at 00:00Z on 1997-11-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 440 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, Peachtre/Fal Fld, GA at 00:00Z on 1997-11-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 562 square meters per square second.1939587897117Sfc1 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
440 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
528 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
562 m²/s²
0-3 km storm-relative helicity
896 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 21, 8:32 PM ESTSevere Thunderstorm WarningFFCMarion, Webster43 min
Nov 21, 8:52 PM ESTTornado WarningFFCMarion33 min
Nov 21, 9:01 PM ESTTornado WarningFFCSchley29 min
Nov 21, 9:06 PM ESTSevere Thunderstorm WarningFFCSumter44 min
Nov 21, 9:27 PM ESTSevere Thunderstorm WarningFFCMacon33 min
Nov 21, 9:29 PM ESTSevere Thunderstorm WarningFFCWebster31 min
Nov 21, 11:15 PM ESTSevere Thunderstorm WarningFFCHouston30 min

Nearby

Flash Flood Warnings in Georgia, 1997Every flash flood warning in 1997

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.