Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 90, NWS Morristown, TN

June 5, 1998Cumberland County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jun 5, 1998, 6:11 PM CDT for Cumberland County, Tennessee. It was in force for 3 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 5, 1998, 6:11 PM CDT (23:11 UTC)
Expired
Jun 5, 1998, 8:45 PM CDT
In force
3 hr
Issued by
NWS Morristown, TN
Area
Whole counties

County Cumberland County, TN

The radar

The Nashville radar (KOHX), 144 km from the middle of the area, began a volume at 23:12 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 12:00Z, 11.2 hours before the alert went out and 145 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 12:00Z on 1998-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Nashville Metro, TN at 12:00Z on 1998-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -146 square meters per square second.19395878Sfc1 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
552 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
-146 m²/s²
0-3 km storm-relative helicity
-71 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 052312
FFWMRX
TNC035-060145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
711 PM EDT (611 PM CDT) FRI JUN 5 1998

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

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

* UNTIL 845 PM CDT (945 PM EDT)

* AT 710 PM EDT... AREA LAW ENFORCEMENT INDICATED THAT CLUSTERS OF
  THUNDERSTORMS WITH VERY HEAVY RAIN WERE LOCATED OVER CUMBERLAND
  COUNTY...MOVING EAST AT 35 MPH.

* EXCESSIVE RAINFALL AT THE RATE OF 1 TO 2 INCHES PER HOUR WILL
  PRODUCE FLOODING ACROSS ACROSS ALL OF CUMBERLAND COUNTY THROUGH 845
  PM CDT (945 PM EDT).

DON'T DRIVE ACROSS FLOODED ROADS! MOST FLASH FLOOD DEATHS OCCUR IN
AUTOMOBILES.

PDK

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 5, 2:05 PM CDT, 4 hours 6 minutes earlier.

Area forecast discussion, Jun 5, 2:05 PM CDT, 4 hours 6 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
305 PM EDT FRI JUN 5 1998

SATELLITE DEPICTING THUNDERSTORM COMPLEX IN CENTRAL ALABAMA...AHEAD OF
A SURFACE FRONT EXTENDING FROM EASTERN AR...TO WESTERN TN...OVER
CENTRAL KY...AND INTO CENTRAL NC.  COMPLEX TAKING A NORTHEASTERLY
MOVEMENT WHICH WILL PUT IT IN OUR CWA THIS EVENING.  STILL EXPECTING
THUNDERSTORMS TO DEVELOP LATE THIS AFTERNOON.  SUNSHINE WILL CONTINUE
TO DESTABILIZE THE AREA AND MODIFIED 12Z BNA SOUNDING HAD CAPES AROUND
1500 AND LI OF -4.  PROBABLY SHOULD KEEP A LIKELY POP OVER ENTIRE CWA
FOR THIS EVENING AND TONIGHT.  WITH THE LOW FFG VALUES OVER MOST OF
OUR COUNTIES AND THE HIGH PRECIPITABLE WATER AT BNA...RECOMMEND
EXTENDING THE FFA THROUGH TONIGHT.

MODELS FAIRLY SIMILAR.  COLD FRONT EXPECTED TO BE THROUGH THE CWA BY
SATURDAY MORNING...BUT STILL SOME PVA ASSOCIATE WITH THE TROF WHICH
MAY TRIGGER A FEW SHOWERS ON SATURDAY.  WEAK VERTICAL VELOCITIES WITH
IT...PROBABLY JUST NEED A CHANCE POP.  500MB TROF OVER APPALACHIANS BY
SUNDAY MORNING.  CWA SHOULD BE COOL AND DRY ON SUNDAY.

FAN AND FWC TEMPERATURES VERY CLOSE...PREFER THE COOLER FAN.

GH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 5, 4:23 AM CDTFlash Flood WarningMRXCumberland3 hr
Jun 5, 5:51 AM CDTSevere Thunderstorm WarningMRXHamilton49 min
Jun 5, 5:55 AM CDTSevere Thunderstorm WarningMRXHamilton45 min
Jun 5, 6:38 AM CDTFlash Flood WarningMRXBradley, Polk2 hr
Jun 5, 6:38 AM CDTFlash Flood WarningMRXHamilton2 hr
Jun 5, 8:06 AM CDTFlash Flood WarningMRXSevier3 hr
Jun 5, 5:26 PM CDTSevere Thunderstorm WarningMRXMonroe34 min
Jun 5, 5:50 PM CDTFlash Flood WarningMRXMonroe3 hr
Jun 5, 6:03 PM CDTSevere Thunderstorm WarningMRXKnox32 min
Jun 5, 6:08 PM CDTSevere Thunderstorm WarningMRXGrainger32 min
Jun 5, 6:13 PM CDTSevere Thunderstorm WarningMRXHamblen, Jefferson32 min
Jun 5, 6:16 PM CDTSevere Thunderstorm WarningMRXSevier19 min
Jun 5, 6:26 PM CDTTornado WarningMRXJefferson, Sevier19 min
Jun 5, 6:45 PM CDTSevere Thunderstorm WarningMRXCocke, Sevier40 min
Jun 5, 6:50 PM CDTSevere Thunderstorm WarningMRXGreene, Hamblen, Hawkins35 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; radar from the NEXRAD Level II archive.