Alert archive / Tennessee / Flash Flood Warnings in 1990

Flash Flood Warning 2, NWS Morristown, TN

December 23, 1990Claiborne County, Union County, Tennessee

NWS Morristown, TN issued this flash flood warning at Dec 23, 1990, 4:37 AM EST for Claiborne County, Union County, Tennessee. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Dec 23, 1990, 4:37 AM EST (09:37 UTC)
Expired
Dec 23, 1990, 7:45 AM EST
In force
3 hr
Issued by
NWS Morristown, TN
Area
Whole counties

Counties Claiborne County, TN, Union 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

Huntington/Tri S, WV (KHTS), launched 00:00Z, 9.6 hours before the alert went out and 247 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, Huntington/Tri S, WV at 00:00Z on 1990-12-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 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, Huntington/Tri S, WV at 00:00Z on 1990-12-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 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
7 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
676 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
122 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 KTYS 230937
FFWTYS
TNC025-173-231245-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KNOXVILLE TN
437 AM EST SUN DEC 23 1990
 
THE NATIONAL WEATHER SERVICE IN KNOXVILLE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  745 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL TENNESSEE
 
   ...CLAIBORNE COUNTY...UNION COUNTY
 
MODERATE TO OCCASIONALLY HEAVY RAIN IN THE PAST HOUR HAS CAUSED
STANDING WATER ACROSS SOME ROADS AND STREAMS HAVE OVERFLOWED
IN UNION AND CLAIBORNE COUNTIES.
 
RAIN CAN BE EXPECTED FOR ANOTHER 2 TO 3 HOURS IN THESE COUNTIES.
MOVE TO HIGHER GROUND IF YOU LIVE IN A FLOOD PRONE AREA.
 
WATER WAS ACROSS HIGHWAY 61 IN SPOTS FROM MAYNARDVILLE TO LUTTRELL.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WBHEN WATER BEGINS RISING.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  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.

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 23, 2:21 AM ESTFlash Flood WarningMRXCumberland, Morgan, Roane4 hr
Dec 23, 5:32 AM ESTFlash Flood WarningMRXBlount, Knox3 hr
Dec 23, 10:30 AM ESTFlash Flood WarningMRXBlount, Sevier2 hr
Dec 23, 3:05 PM ESTFlash Flood WarningMRXBlount, Sevier3 hr

Nearby

Flash Flood Warnings in Tennessee, 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.