Alert archive / Georgia / Flash Flood Warnings in 1990

Flash Flood Warning 32, NWS Atlanta, GA

March 16, 1990Fannin County, Murray County, Georgia

NWS Atlanta, GA issued this flash flood warning at Mar 16, 1990, 4:37 PM EST for Fannin County, Murray County, Georgia. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Mar 16, 1990, 4:37 PM EST (21:37 UTC)
Expired
Mar 16, 1990, 10:00 PM EST
In force
5 hr
Issued by
NWS Atlanta, GA
Area
Whole counties

Counties Fannin County, GA, Murray 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, 9.6 hours before the alert went out and 149 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 1990-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Athens Municipal, GA at 12:00Z on 1990-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 352 square meters per square second.19395878Sfc1 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
18 J/kg
Mixed-layer CIN
-85 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
352 m²/s²
0-3 km storm-relative helicity
390 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 KATL 162139
FFWATL
GAC015-055-111-115-123-129-143-213-227-233-170300-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ATLANTA GA
437 PM EST FRI MAR 16 1990

THE NATIONAL WEATHER SERVICE IN ATLANTA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  1000 PM EST
FOR PEOPLE IN THE FOLLOWING COUNTIES...

IN NORTHWEST GEORGIA
          ...BARTOW...CHATTOOGA...FANNIN...FLOYD...GILMER...GORDON
          ...HARALSON...MURRAY...PICKENS...POLK

RAINFALL WAS GENERALLY LIGHTER ACROSS THE NORTHWEST GEORGIA AREA AT MID
AFTERNOON.  BUT LIGHT TO MODERATE RAINS CONTINUED TO FALL ON GROUND
THAT HAS ALREADY BEEN SATURATED BY THE 4 TO 5 INCHES OF RAINFALL WHICH
FELL EARLIER TODAY. CEDARTOWN MEASURED ANOTHER ONE INCH OF RAIN
BETWEEN 11 AM AND 4 PM...AND THE ROME AIRPORT HAD NEARLY 1/2 INCH.
AT 4PM...BIG CEDAR CREEK NEAR CEDARTOWN WAS AT 18.1 FEET AND
STILL RISING. A CREST APPROACHING 20 FEET IS NOW EXPECTED AT CEDARTOWN
EARLY TONIGHT.  FLOOD STAGE IS 15 FEET AND THIS RISE HAS RESULTED
IN EVACUATIONS IN THE GEORGIA AVENUE AND WEST AVENUE AREAS IN
CEDARTOWN. THIS EXPECTED CREST WOULD BE SIMILAR TO A FLOOD
IN 1979 IN CEDARTOWN.

NUMEROUS ROADS HAVE BEEN REPORTED CLOSED IN FLOYD AND CHATTOOGA
COUNTIES.  REPORTS FROM MANY OUTLYING AREAS WERE SKETCHY...BUT
IT IS APPARENT THAT MANY STREAMS WERE OVERFLOWING THEIR BANKS.

AT 430 PM...ANOTHER SURGE OF RAIN OVER EAST-CENTRAL ALABAMA WAS VISIBLE
ON SATELLITE AND RADAR.  THIS AREA OF RAIN WAS DEVELOPING NORTHEASTWARD
...AND MORE HEAVY RAIN IS POSSIBLE LATE TODAY AND TONIGHT IN THE
NORTHWEST GEORGIA AREA.  ADDITIONAL HEAVY RAIN WOULD ONLY AGGRAVATE
FLOOD CONDITIONS.  PEOPLE LIVING BELOW SMALL EARTHEN DAMS SHOULD BE
ESPECIALLY ALERQT.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 16, 7:25 AM ESTFlash Flood WarningFFCPolk5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCFannin, Gilmer, Gordon, Murray, Pickens5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCChattooga, Floyd5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCHaralson5 hr
Mar 16, 7:52 AM ESTFlash Flood WarningFFCBartow5 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCBartow, Floyd, Gordon, Pickens, Polk6 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCFannin, Gilmer, Murray6 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCChattooga6 hr
Mar 16, 10:53 AM ESTFlash Flood WarningFFCHaralson6 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCBartow, Floyd, Haralson, Polk5 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCGilmer, Gordon, Pickens5 hr
Mar 16, 4:37 PM ESTFlash Flood WarningFFCChattooga5 hr
Mar 16, 4:47 PM ESTFlash Flood WarningFFCDade, Walker4 hr
Mar 16, 4:47 PM ESTFlash Flood WarningFFCCatoosa, Whitfield4 hr
Mar 16, 5:40 PM ESTSevere Thunderstorm WarningFFCFulton50 min
Mar 16, 6:31 PM ESTTornado WarningFFCRockdale29 min
Mar 16, 6:46 PM ESTTornado WarningFFCNewton, Walton59 min
Mar 16, 6:54 PM ESTFlash Flood WarningFFCCobb, Douglas, Fulton4 hr
Mar 16, 6:54 PM ESTFlash Flood WarningFFCDeKalb4 hr

Nearby

Flash Flood Warnings in Georgia, 1990Every flash flood warning in 1990

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.