Alert archive / Tennessee / Flash Flood Warnings in 1986

Flash Flood Warning 4, NWS Memphis, TN

September 18, 19865 counties in Tennessee

NWS Memphis, TN issued this flash flood warning at Sep 18, 1986, 6:52 PM CDT for 5 counties in Tennessee. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Sep 18, 1986, 6:52 PM CDT (23:52 UTC)
Expired
Sep 18, 1986, 10:00 PM CDT
In force
3 hr
Issued by
NWS Memphis, TN
Area
Whole counties

Counties Crockett County, TN, Dyer County, TN, Gibson County, TN, Lauderdale County, TN, Madison 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

Little Rock, AR (KLZK), launched 12:00Z, 11.9 hours before the alert went out and 132 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, Little Rock, AR at 12:00Z on 1986-09-18Temperature 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, Little Rock, AR at 12:00Z on 1986-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 8 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3613 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
8 m²/s²
0-3 km storm-relative helicity
17 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 
TTAAOO KMEM 182352
FFWMEM
ARC031-093-TNC033-045-053-097-113-190300-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MEMPHIS TN
652 PM CDT THU SEP 18 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1000 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
 
IN NORTHEAST ARKANSAS
          ..CRAIGHEAD..MISSISSIPPI
IN WEST TENNESSEE
          ..CROCKETT..DYER..GIBSON
          ..LAUDERDALE..MADISON

HEAVY RAINS THAT HAVE FALLEN IN A BAND FROM JONESBORO ARKANSAS TO
JACKSON TENNESSEE DURING THE PAST 3 HOURS HAVE DUMPED BETWEEN 3 AND 5
INCHES OF RAIN AND POSSIBLY MORE IN ISOLATED SPOTS. FLOODING HAS BEEN
REPORTED IN JONESBORO ARKANSAS...JACKSON TENNESSEE...AND HUMBOLDT
TENNESSEE.
 
RAINS CONTINUE TO FALL IN THESE AREAS.  EVEN WITHOUT  ADDITIONAL
RAIN...CONTINUED RUNOFF WILL LIKELY CAUSE FLASH FLOODING DURING THE
NEXT 3 HOURS.  STREAMS AND ROADS WILL OVERFLOW WITH WATER CAUSING
LIFE-THREATENING CONDITIONS.
 
IF WATER RISES IN YOUR AREA...MOVE TO HIGHER GROUND OR AWAY FROM THE
FLOODING RIGHT AWAY.  DO NOT...REPEAT DO NOT...DRIVE THROUGH FLOODED
AREAS OR ACROSS BRIDGES WHERE WATER IS FLOWING ACROSS THEM.
 
HEAVIEST RAINS ARE EXPECTED TO DIMINISH BY AROUND 900 PM.  HOWEVER,
AREA RESIDENTS NEED TO USE ALL APPROPRIATE CAUTION THIS EVENING.
 
PLEASE CONTINUE TO MONITOR THIS STATION FOR THE LATEST WEATHER
INFORMATION.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT.  IT'S
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS, RIVERS, OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS.  CAMPERS SHOULD
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

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, Sep 18, 3:16 PM CDT, 3 hours 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE  MEMPHIS TN
315 PM CDT THU SEP 18 1986

       ... STRONG THUNDERSTORMS DEVELOPING ACROSS THE MID-SOUTH ...

ONCE AGAIN...STRONG THUNDERSTORMS HAVE DEVELOPED DURING THE HEAT OF
MID-AFTERNOON ACROSS THE MID-SOUTH. AT 3:15 PM CDT THUNDERSTORMS COVERED
MUCH OF NORTHWEST MISSISSIPPI AND MUCH OF NORTHWEST TENNESSEE AND THE
MISSOURI BOOTHEEL.  THE STRONGEST THUNDERSTORM WAS LOCATED ALONG THE
TENNESSEE-MISSISSIPPI LINE BETWEEN HOLLY SPRINGS MISSISSIPPI AND
COLLIERVILLE TENNESSEE.

DUE...IN PART...TO THE VERY WARM AFTERNOON TEMPERATURES...THE STRONGEST
THUNDERSTORMS WILL PRODUCE STRONG AND POSSIBLY DAMAGING WINDS. IN
ADDITION...THE THUNDERSTORMS MAY ALSO FEATURE HAIL AND VERY HEAVY RAIN.

THESE THUNDERSTORMS ARE MOVING TO THE NORTHEAST AROUND 15 MILES AN HOUR
AND WILL CONTINUE TO AFFECT THE MID-SOUTH UNTIL A FEW HOURS AFTER
SUNSET.
RESIDENTS OF THE MID-SOUTH SHOULD REMAIN ALERT TO THE POSSIBILITY OF
SEVERE WEATHER.  PLEASE REMEMBER THAT LOW-LYING ROADWAYS MAY BECOME
WATER COVERED RAPIDLY...DO NOT ATTEMPT TO DRIVE THROUGH HIGH WATER.

PLEASE MONITOR THIS STATION FOR ADDITIONAL STATEMENTS AND POSSIBLE
WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 3:53 PM CDTSevere Thunderstorm WarningMEGLauderdale37 min

Nearby

Flash Flood Warnings in Tennessee, 1986Every flash flood warning in 1986

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.