Alert archive / Georgia / Flash Flood Warnings in 1987

Flash Flood Warning 2, NWS Atlanta, GA

January 18, 1987Cobb County, Douglas County, Georgia

NWS Atlanta, GA issued this flash flood warning at Jan 18, 1987, 2:50 PM EST for Cobb County, Douglas County, Georgia. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Jan 18, 1987, 2:50 PM EST (19:50 UTC)
Expired
Jan 18, 1987, 8:00 PM EST
In force
5 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Cobb County, GA, Douglas County, GA

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

Athens Municipal, GA (KAHN), launched 12:00Z, 7.8 hours before the alert went out and 127 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, Athens Municipal, GA at 12:00Z on 1987-01-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Athens Municipal, GA at 12:00Z on 1987-01-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 524 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
538 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
524 m²/s²
0-3 km storm-relative helicity
792 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jan 18, 2:50 PM ESTFlash Flood WarningFFCDeKalb, Fulton5 hr

Nearby

Flash Flood Warnings in Georgia, 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.