Alert archive / Tennessee / Flash Flood Warnings in 2000

Flash Flood Warning 3, NWS Morristown, TN

April 4, 20004 counties in Tennessee

NWS Morristown, TN issued this flash flood warning at Apr 4, 2000, 12:48 AM EDT for 4 counties in Tennessee. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 4, 2000, 12:48 AM EDT (04:48 UTC)
Expired
Apr 4, 2000, 4:40 AM EDT
In force
4 hr
Issued by
NWS Morristown, TN
Area
Whole counties

Counties Anderson County, TN, Knox County, TN, Morgan County, TN, Roane County, TN

The radar

The Knoxville radar (KMRX), 85 km from the middle of the area, began a volume at 04:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 4.8 hours before the alert went out and 205 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 00:00Z on 2000-04-04Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2000-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
599 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 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 
WGUS54 KMRX 040450
FFWMRX
TNC001-093-129-145-040840-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MORRISTOWN TN
1248 AM EDT TUE APR 4 2000

THE NATIONAL WEATHER SERVICE IN MORRISTOWN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ANDERSON COUNTY IN EASTERN TENNESSEE
  KNOX COUNTY IN EASTERN TENNESSEE
  MORGAN COUNTY IN EASTERN TENNESSEE
  ROANE COUNTY IN EASTERN TENNESSEE

* UNTIL 440 AM EDT

* AT 1239 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LARGE AREA OF MODERATE TO LOCALLY HEAVY SHOWERS MOVING NORTHEAST AT
  35 MPH ACROSS THE WESTERN SECTIONS OF THE TENNESSEE VALLEY.

  AT 1240 AM EDT...HIGHWAY 95 IN ROANE COUNTY WAS REPORTED CLOSED AS 
  WELL AS HIGH WATER ACROSS HIGHWAY 61 IN SEVERAL LOCATIONS.         
  SEVERAL ROADS ARE OR SOON WILL BE CLOSED BETWEEN CLINTON AND       
  BRICEVILLE DUE TO HIGH WATER IN ANDERSON COUNTY.  KNOX COUNTY 
  DISPATCH REPORTED NUMEROUS ROADWAYS CLOSED DUE TO HIGH WATER.

* LOCATIONS IN THE WARNING INCLUDE SUNBRIGHT...RUGBY...POWELL...PINE
  ORCHARD...PETROS...PAINT ROCK...OLIVER SPRINGS...OAKDALE...
  NORRIS...MASCOT...MALONEYVILLE...LAKE CITY...KARNS...HIGH POINT...
  HARRIMAN...HALLS...FARRAGUT...FAIRVIEW...DEERLODGE...DEARMOND...
  BRADBURY AND BEARDEN.

NATIONAL WEATHER SERVICE DOPPLER RADAR HAS ESTIMATED THAT 2 TO 4  
INCHES OF RAIN HAVE FALLEN OVER THE PAST 12 HOURS.  AN ADDITIONAL 
1/2 TO 1 INCH OF RAIN IS EXPECTED OVER THE NEXT 3 HOURS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY COUNTRY
ROADS...FARMLANDS...AND OTHER LOW LYING AREAS THAT ARE SUBJECT TO
FLASH FLOODING. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS
IF WATER COVERS THE ROADWAY.

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 HIGHER GROUND TO ESCAPE FLOOD WATERS.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 10:45 PM EDTFlash Flood WarningMRXBledsoe, Hamilton, Marion, Rhea, Sequatchie6 hr

Nearby

Flash Flood Warnings in Tennessee, 2000Every flash flood warning in 2000

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; radar from the NEXRAD Level II archive.