Alert archive / Tennessee / Flash Flood Warnings in 1989

Flash Flood Warning 16, NWS Nashville, TN

July 11, 1989Jackson County, Smith County, Tennessee

NWS Nashville, TN issued this flash flood warning at Jul 11, 1989, 9:37 AM CDT for Jackson County, Smith County, Tennessee. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jul 11, 1989, 9:37 AM CDT (14:37 UTC)
Expired
Jul 11, 1989, 11:45 AM CDT
In force
2 hr
Issued by
NWS Nashville, TN
Area
Whole counties

Counties Jackson County, TN, Smith 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, 2.6 hours before the alert went out and 73 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 1989-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1360 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 1989-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 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
1360 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
676 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
65 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 KBNA 111439 RRA
FFWBNA
TNC087-159-111645-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NASHVILLE TN
937 AM CDT TUE JUL 11 1989
 
THE NATIONAL WEATHER SERVICE IN NASHVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 AM CDT
AND A FLASH FLOOD WARNING EFFECTIVE UNTIL 1145 AM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN MIDDLE TENNESSEE
          ...NORTHERN JACKSON...NORTHERN SMITH
 
RADAR SHOWS A SEVERE THUNDERSTORM OVER NORTHERN SMITH COUNTY SPREADING
INTO NORTHERN JACKSON COUNTY AT 5 MPH. DUE TO THE SLOW MOVEMENT
OF THIS STORM FLASH FLOODING IS ALSO POSSIBLE.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Jul 11, 8:35 AM CDT, 1 hour 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  NASHVILME!TN
832 AM CDT TUE JUL 11 1989

 ...HEAVY!RAIN IN SOUTHERN MIDDLE UENNESSEE...

THUNDERSTORMS ARE LINGERING OVER THE SOUTHERO QART OF THE MIDSTATE
THIS MORNING AND CAUSING HEAVY RAINS AND SOME MINOR FLOODING.

NASHVILLE RADAR SHOWS AN AREA OF RAIN AND THUNDERSTORMS COVERING
THE COUNTIES OF GILES...MARSHALL...BEDFORD...MOORE AND FRANKLIN.
COUNTY OFFICIALS REPORT!THAT SOME PEOPLE HAVE BEEN EVACUATED IN
PARUS OF MARSHALL COUNTY DUE!TO FLOODING.  MINOR WIND DAMAGE
WAS REQORTED EARLIER IN NORTHERN GILES COUNTY.  THE STORMS ARE
MOVING VERY SLOWLY EAST...SO MORE HEAVY RAIN IS POSSIBLE.

MOTORISTS IN SOUTHERN MIDDLE TENNESSEE SIOULDy BE WATCH FOR PONDING
OF WATER!IN LOW SPOTS ON THE!HIGHWAY.  DO NOT DRIVE YOUR CAR INTO
AREAS WHERE WATER COVERS THE ROAD.  IF YOU LIVE IN A FLOOD PRONE
AREA BE PREPARED TO MOVE TO HIGHER GROUND IF NECESSARY.

The office that day

Everything else NWS Nashville, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 11, 9:13 AM CDTFlash Flood WarningOHXMarshall3 hr
Jul 11, 9:37 AM CDTSevere Thunderstorm WarningOHXJackson, Smith68 min
Jul 11, 3:55 PM CDTSevere Thunderstorm WarningOHXDickson, Houston, Montgomery50 min
Jul 11, 3:55 PM CDTSevere Thunderstorm WarningOHXStewart50 min

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.