Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 98, NWS Morristown, TN

June 22, 1998Sullivan County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jun 22, 1998, 7:47 PM EDT for Sullivan County, 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
Jun 22, 1998, 7:47 PM EDT (23:47 UTC)
Expired
Jun 22, 1998, 11:50 PM EDT
In force
4 hr
Issued by
NWS Morristown, TN
Area
Whole counties

County Sullivan County, TN

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.8 hours before the alert went out and 221 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, Greensboro/Hi Pt, NC at 12:00Z on 1998-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 147 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, Greensboro/Hi Pt, NC at 12:00Z on 1998-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
147 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1105 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
13 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 KMRX 222348
FFWMRX
TNC163-230350-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
747 PM EDT MON JUN 22 1998

THE NATIONAL WEATHER SERVICE IN KNOXVILLE/TRI-CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN SULLIVAN COUNTY IN EASTERN TENNESSEE

* UNTIL 1150 PM EDT

* AT 747 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THAT CLUSTERS OF THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED
  OVER WESTERN SULLIVAN COUNTY... MOVING SOUTHEAST AT 20 MPH.

* EXCESSIVE RAINFALL AT THE RATE OF EXCEEDING 1 INCH AN HOUR WILL
  PRODUCE FLOODING ACROSS WESTERN SULLIVAN COUNTY THROUGH 1150 PM
  EDT.  STREET FLOODING ACROSS KINGSPORT IS LIKELY.T..SO DRIVE WITH
  CAUTION.


DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

HSA/DH

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.

NWS Morristown, TN wrote its last area forecast discussion before this flash flood warning went out at Jun 22, 7:30 PM EDT, 17 minutes earlier.

Area forecast discussion, Jun 22, 7:30 PM EDT, 17 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
730 PM EDT MON JUN 22 1998

A COMPLEX OF SHOWERS AND THUNDERSTORMS OVER NRN/ERN KY CONTINUES TO
MOVE EAST SOUTHEAST TOWARD SW VA/NE TN/NRN PLATEAU. AMS ACROSS THE CWA
REMAINS MOIST AND UNSTABLE WITH ADAP DEPICTING LI'S OF -7 TO -9 AND
CAPES RANGING FROM 2500 TO 4000 J/KG. WOULD SUGGEST UPPING POPS TO
LIKELY FOR CSV TO TYS NORTH (INCLUDING SW VA) AND 30 PERCENT FOR SE
TN. ALSO...ADD 20-30 POPS FOR FAR SW NC.

MAIN THREAT FROM THESE STORMS WILL BE TORRENTIAL RAINS/LOCALLIZED
FLASH FLOODING AND DAMAGING DOWNBURSTS WINDS DUE TO THE MID-LVL DRY
AIR. ONLY MARGINAL SVR HAIL ANTICIPATED DUE TO HIGH WBZ. WOULD SUGGEST
INCLUDING LOCALLY HEAVY RAINFALL IN THE PUBLIC FCST.

DH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 9:56 PM EDTSevere Thunderstorm WarningMRXMonroe64 min
Jun 22, 6:50 PM EDTSevere Thunderstorm WarningMRXAnderson, Knox, Union35 min
Jun 22, 7:01 PM EDTSevere Thunderstorm WarningMRXSullivan49 min
Jun 22, 7:35 PM EDTSevere Thunderstorm WarningMRXKnox65 min
Jun 22, 7:57 PM EDTSevere Thunderstorm WarningMRXGreene48 min
Jun 22, 7:58 PM EDTSevere Thunderstorm WarningMRXClaiborne62 min

Nearby

Flash Flood Warnings in Tennessee, 1998Every flash flood warning in 1998

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.