Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 99, NWS Morristown, TN

June 22, 1998Carter County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jun 22, 1998, 8:13 PM EDT for Carter 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, 8:13 PM EDT (00:13 UTC)
Expired
Jun 23, 1998, 12:15 AM EDT
In force
4 hr
Issued by
NWS Morristown, TN
Area
Whole counties

County Carter County, TN

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 0.2 hours before the alert went out and 201 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 00:00Z on 1998-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1385 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1998-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
1385 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1520 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
138 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 230013
FFWMRX
TNC019-230415-

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

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

* FLASH FLOOD WARNING FOR...
  CARTER COUNTY IN EASTERN TENNESSEE

* UNTIL 1215 AM EDT

* AT 811 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THAT CLUSTERS OF THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED
  OVER CARTER COUNTY... MOVING SOUTHEAST AT 25 MPH.

* EXCESSIVE RAINFALL AT THE RATE OF EXCEEDING 2 INCHES AN HOUR WILL
  PRODUCE FLOODING ACROSS CARTER COUNTY THROUGH 1220 AM EDT.

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, 43 minutes earlier.

Area forecast discussion, Jun 22, 7:30 PM EDT, 43 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 22, 8:01 PM EDTSevere Thunderstorm WarningMRXHancock64 min
Jun 22, 8:03 PM EDTSevere Thunderstorm WarningMRXCarter62 min
Jun 22, 8:06 PM EDTSevere Thunderstorm WarningMRXJefferson64 min
Jun 22, 8:10 PM EDTSevere Thunderstorm WarningMRXSevier65 min
Jun 22, 8:10 PM EDTSevere Thunderstorm WarningMRXGrainger, Hamblen, Hawkins65 min
Jun 22, 8:26 PM EDTSevere Thunderstorm WarningMRXLoudon, Roane64 min
Jun 22, 8:31 PM EDTSevere Thunderstorm WarningMRXCocke64 min
Jun 22, 8:31 PM EDTSevere Thunderstorm WarningMRXUnicoi, Washington64 min
Jun 22, 8:39 PM EDTSevere Thunderstorm WarningMRXKnox66 min
Jun 22, 8:43 PM EDTSevere Thunderstorm WarningMRXGreene62 min
Jun 22, 8:45 PM EDTSevere Thunderstorm WarningMRXBlount65 min
Jun 22, 9:16 PM EDTSevere Thunderstorm WarningMRXCarter, Unicoi64 min
Jun 22, 9:18 PM EDTSevere Thunderstorm WarningMRXSevier32 min
Jun 22, 9:21 PM EDTSevere Thunderstorm WarningMRXJohnson49 min
Jun 22, 9:26 PM EDTSevere Thunderstorm WarningMRXLoudon, Roane64 min
Jun 22, 9:26 PM EDTSevere Thunderstorm WarningMRXMonroe64 min
Jun 22, 9:38 PM EDTFlash Flood WarningMRXLoudon, Roane3 hr
Jun 22, 9:42 PM EDTSevere Thunderstorm WarningMRXBlount63 min
Jun 22, 9:56 PM EDTSevere Thunderstorm WarningMRXMcMinn64 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.