Alert archive / Tennessee / Flash Flood Warnings in 1989

Flash Flood Warning 11, NWS Atlanta, GA

June 20, 1989Hamilton County, Tennessee

NWS Atlanta, GA issued this flash flood warning at Jun 20, 1989, 2:50 PM EDT for Hamilton County, Tennessee. It was in force for 115 min.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 2:50 PM EDT (18:50 UTC)
Expired
Jun 20, 1989, 4:45 PM EDT
In force
115 min
Issued by
NWS Atlanta, GA
Area
Whole counties

County Hamilton County, TN

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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.8 hours before the alert went out and 167 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, Nashville Metro, TN at 12:00Z on 1989-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 463 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, Nashville Metro, TN at 12:00Z on 1989-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
463 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
599 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
35 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 KCHA 201856
FFWCHA
TNC065-202045-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHATTANOOGA TN
250 PM EDT TUE JUN 20 1989
 
THE NATIONAL WEATHER SERVICE IN CHATTANOOGA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  445 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTHEAST TENNESSEE
          ...HAMILTON
 
AT 2 50 EDT THIS AFTERNOON RADAR CONTINUED TO INDICTATE THUNDERSTORMS
WITH VERY HEAVY RAIN MOVING NORTHEAST ACROSS THE COUNTY.
 
SOME FLOODING HAS BEEN REPORTED IN PARTS OF THE COUNTY AND THE
ADDITIONAL RAIN FALLING IS GOING TO MAKE CONDITIONS MUCH WORSE.
 
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.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN A-UTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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, 12:45 PM EDT, 2 hours 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATHENS GA
 1240 PM EDT TUE JUN 20, 1989

...HEAVY RAINFALL AMOUNTS NOW OCCRING IN PORTIONS OF NORTHEAST GEORGIA...

NARROW BAND OF HEAVY RAINFALL OCCURING FROM NEAR TOCCOA TO JUST
NORTH OF JEFFERSON TO JUST NORTH OF GRIFFIN , GEORGIA.

STROMS CONTINUE TO MOVE ALONG THE SAME AREA CASUSING HEAVY SHOWER
AFTER HEAVY SHOWER WITH RAINFALL RATES GREATER THAN AN INCH AN
HOUR.

PERSONS IN LOW LYING AREAS AND NEAR SMALL STREAMS SHOULD BE
VERY WATCHFUL TO THE AREA AROUND THEM . WITH SUCH HEAVY RAINFALL
RATES THE WATER CAN RISE VERY QUICKLY CUTTING OFF ROUTES OF ESCAPE.

DO NOT PUT OFF MOVING OUT IF RAINFALL RATES ARE HEAVY IN YOUR AREA.
YOUR LIFE MAY COUNT ON YOUR PROMPT ACTION.
Special weather statement, Jun 20, 1:40 PM EDT, 1 hour 10 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATHENS GA
135 PM EDT TUE JUN 20 1989

BAND OF HEAVY RAIN FROM SOUTH OF ASHEVILLE NORTH CAROLINA TO NEAR
WALHALLA IN SOUTH CAROLINA TO NEAR WINDER GEORGIA TO NEAR GRIFFIN
GEORGIA AND ALSO IN THE ATLANTA AREA. RAINFALL RATES IN THIS BAND
GREATER THAN ONE INCH AN HOUR.

STREAMS IN HABERSAHM COUNTY ARE RISING AT A RAPIDED RATE CASUSING
SOME ROADS TO BE CLOSED. MANY COUNTIES IN THE ATLANTA AREA ARE
NOW UNDER FLASH FLOOD WARNINGS WHILE MOST OF NORTH GEORGIA REMAINS
UNDER A FLASH FLOOD WATCH.

IN GENERAL AREA OF RAIN AND THUNDERSTORMS  75 MILES WIDE FROM NEAR
MONTGOMERY ALABAMA NORTHEAST THROUGH GEORGIA TO NEAR ASHEVILLE
NORTH CAROLINA WITH OTHER SHOWERS OVER SOUTH GEORGIA AND
SOUTH CAROLIA.

ELEMENTS MOVING NORTH-NORTHEAST AT 30 MPH.
Special weather statement, Jun 20, 2:18 PM EDT, 32 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MACON GA
218 PM EDT TUE JUNE 20 1989

...FLASH FLOOD WATCH FOR NORTHEAST..CENTRAL..AND SOUTHWEST GEORGIA
   FOR TODAY...

AT AT 210 PM A STRONG THUNDERSTORM MOVED INTO TURNER COUNTY SOUTH OF
REBECCA AND WAS MOVING NORTHEAST 20 MILES AN HOUR TOWARD BEN HILL AND
WILCOX COUNTIES.

OTHER THUNDERSTORMS WERE INCREASING STRENGTH IN A LINE FROM NORTH OF
ABBEVILLE SOUTH TO NEAR REBECCA. THESE NEWLY FORMED STORMS WERE MOVING
NORTHEAST 20 MILES AN HOUR.

VERY HEAVY RAIN AND FREQUENT LIGHTNING WITH WIND GUSTS OVER 40 MILES
AN HOUR COME WITH THESE STORMS. LOW AREAS COULD FLOOD QUICKLY AS
THIS LINE OF STORMS FOLLOWS ONE AFTER ANOTHER THROUGH TURNER..BEN HILL
AND WILCOX COUNTIES IN THE NEXT TWO HOURS.
Special weather statement, Jun 20, 2:25 PM EDT, 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATHENS GA
 220PM TUE JUN 20, 1989

 COOP OBSERVER IN GAINESVILLE , GEORGIA, REPORTS 3 INCHES OF
RAIN IN PAST 24 HOURS..

PD IN WINDER , GEORGIA,! REPORTS FLOODING OF UNDERPASS IN THAT
CITY..

HABERSHAM EOC REPORTS ROAD IN NORTH PART OF THAT COUNTY CLOSED
DUE TO 3 FOOT  OF WATER OVER THE ROAD AND STILL RISING.
MORE ROADS LIKELY TO BECOME CLOSE...
Special weather statement, Jun 20, 2:35 PM EDT, 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ATHENS GA
335 PM TUE JUN 20, 1989

 COOP OBSERVER 6 NORTHWEST OF CLAYTON, GEORGIA, REPORTS 3.63 INCHES
OF RAIN IN PAST 15 HOURS.

LAKE BURTON IN RABUN CO(UNTY NEAR BANK FULL AT THIS TIME.
Special weather statement, Jun 20, 2:47 PM EDT, 3 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE ATHENS GA
243 PM EDT TUE JUN 20 1989

AT 235 PM EDT...A BAND OF THUNDERSTORMS WITH VERY HEAVY RAIN...
EXTENDED FROM NEAR BARNESVILLE IN WEST CENTRAL GEORGIA THROUGH
CONYERS TO JUST SOUTH OF TOCCOA IN NORTHEAST GEORGIA. THIS BAND
WAS 8 MILES WIDE AND WAS MOVING NORTH-NORTHEAST AT 30 MILES AN
HOUR. FLOODING HAS ALREADY BEEN REPORTED IN SOME OF THESE COUNTIES.

PERSONS IN NORTHEAST GEORGIA SHOULD BE ON THE ALERT FOR POSSIBLE
FLOODING FOR THE REST OF THE AFTERNOON. BANKS...BARROW...HABERSHAM
...HALL...JACKSON...STEPHENS AND WALTON COUNTIES OF NORTHEAST
GEORGIA ARE UNDER A FLASH FLOOD WARNING UNTIL 515 PM EDT THIS
3AFTERNOON.

MOVEMENT WAS NORTHEAST 30 MILES AN HOUR.

Nearby

Flash Flood Warnings in Tennessee, 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.