Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 97, NWS Morristown, TN

June 10, 1998Cumberland County, Tennessee

NWS Morristown, TN issued this flash flood warning at Jun 10, 1998, 1:46 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 10, 1998, 1:46 PM CDT (18:46 UTC)
Expired
Jun 10, 1998, 4:45 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 18:49 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, 6.8 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 1998-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3323 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 1998-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 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
3323 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
1.6
Supercell composite
8.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMRX 101846
FFWMRX
TNC035-102145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
246 PM EDT (146 PM CDT) WED JUN 10 1998

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

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

* UNTIL 445 PM CDT (545 PM EDT)

* AT 140 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LARGE AREA OF RAINFALL LOCATED OVER SOUTHERN CUMBERLAND
  COUNTY... MOVING SOUTH AT 15 MPH..

* RAINFALL AT THE RATE OF 1/2 INCH PER HOUR WILL CAUSE THE
  FLOODING TO COUNTINUE ACROSS SOUTHERN CUMBERLAND
  COUNTY THROUGH 450 PM CDT (550 PM EDT).

EMA OFFICIALS REPORT MOST OF THE ROADS IN SOUTHERN CUMBERLAND COUNTY
CLOSED WITH SEVERAL EVACUATIONS.

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

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 10, 1:13 PM CDT, 33 minutes earlier.

Area forecast discussion, Jun 10, 1:13 PM CDT, 33 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
213 PM EDT WED JUN 10 1998

...MAIN CONCERNS FFW POTENTIAL..SVR POTENTIAL..PRECIP IN LATER
PERIODS..RECOMMEND FFW FOR ALL AREAS THIS EVENING AND OVERNIGHT...

...CORRECTED FFW PERIOD AS TSRA ALREADY FIRING IN KY...
..THANKS MEM FOR COORD. CALL...

HAVE GONE W/ THE ETA SOLUTION AS IT HAD THE BEST HANDLE ON THIS AFTNS
MCS OVER SW KY..N AND SE TN.  PRECIP AMNTS ARND 3 IN. IN AN HOUR
PRODUCING NUMEROUS REPORTS OF FLOODING ACROSS THE CWA.  CAPES ARND
4000 AND LIS ARND -10...K INDICES 45-50..AND PWS 1.5-2.0 INCHES.
HEAVY RAIN A DEFINITE POTENTIAL THIS EVENING.

RIDGE SFC AND ALOFT IS WEAK AND ALLOWING PRECIP TO MOVE SE ACRS CWA.
THICKNESS PATTERNS STAY NW THROUGH F36 HOURS SO ANYTHING THAT DEVELOPS
IN OK..KS..MO..IA..KY WILL MOVE INTO THE AREA AND SOME COULD PRODUCE
HEAVY RAIN AND SEVERE WEATHER.  UPPER LEVEL DIVERGENCE ONCE AGAIN
NOTICED ACROSS W TN AND MOST OF MO..TOWARDS 12Z THU MORNING.
ATMOSPHERE REMAINS UNSTABLE THROUGH F48...SURFACE WARM FRONT REMAINS
IN THE AREA FOR THE NEXT 24 HOURS...WITH LINGERING OUTFLOW
BOUNDARIES...POPS WARRENTED THROUGH FORECAST PERIOD.  WITH HIGH PWS
STAYING IN THE AREA...HEAVY RAIN POSSIBLE MOST AREAS THROUGH THE
EVENING UPDATE..WOULD LIKE TO GO WITH A FFW FOR THIS EVENING ALL
AREAS..AS THE PRECIP WILL MOVE OUT OF THE AREA WITH AN AREA OF
SUBSIDENCE BEHIND IT...THEN FIRE UP AGAIN AROUND 3 AM.

AFTER THESE SHOWERS/THUNDERSTORMS MOVE THROUGH THE AREA...SHOULD SEE A
BREAK AND HAVE REDEVELOPMENT AFTER MIDNIGHT.

RECOMMEND...
FOR CRW...MEM...RDU (ALL AREAS)...GO A CAT COOLER ON TEMPS IN MTNS.
..FLASH FLOOD WATCH THIS EVENING..

THIS EVENING...SHOWERS AND THUNDERSTORMS. HEAVY RAIN POSSIBLE. SOME
MAY BE SEVERE.
.TONIGHT...CLOUDY WITH A 40 PERCENT CHANCE FOR SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOW IN THE MID 60S. LIGHT AND VARIABLE
WIND.
.THURSDAY...CONTINUED CLOUDY AND MUGGY WITH A GOOD
CHANCE FOR THUNDERSOTRMS. HIGH AROUND 80. SOUTHWEST WIND 10 TO 15 MPH.
CHANCE FOR RAIN 50 PERCENT.
.THURSDAY NIGHT...CLOUDY WITH A CHANCE OF THUNDERSTORMS. LOW IN THE
MID 60S. CHANCE FOR RAIN 40 PERCENT.
.FRIDAY...BECOMING PARTLY CLOUDY WITH A CHANCE FOR THUNDERSTORMS. HIGH
IN THE LOWER 80S. CHANCE FOR RAIN 30 PERCENT.

THANKS...PDK

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 1:43 AM CDTSevere Thunderstorm WarningMRXCampbell47 min
Jun 10, 2:44 AM CDTSevere Thunderstorm WarningMRXJohnson36 min
Jun 10, 10:25 AM CDTSevere Thunderstorm WarningMRXCumberland60 min
Jun 10, 10:54 AM CDTSevere Thunderstorm WarningMRXRhea46 min
Jun 10, 11:02 AM CDTFlash Flood WarningMRXCumberland3 hr
Jun 10, 11:27 AM CDTSevere Thunderstorm WarningMRXCumberland63 min
Jun 10, 11:33 AM CDTSevere Thunderstorm WarningMRXHamilton62 min
Jun 10, 11:52 AM CDTSevere Thunderstorm WarningMRXRoane48 min
Jun 10, 12:07 PM CDTSevere Thunderstorm WarningMRXBradley, Polk33 min
Jun 10, 12:11 PM CDTSevere Thunderstorm WarningMRXMeigs34 min
Jun 10, 12:18 PM CDTSevere Thunderstorm WarningMRXMonroe62 min
Jun 10, 12:24 PM CDTSevere Thunderstorm WarningMRXLoudon, McMinn66 min
Jun 10, 12:24 PM CDTSevere Thunderstorm WarningMRXRhea66 min
Jun 10, 12:33 PM CDTFlash Flood WarningMRXMorgan, Roane3 hr
Jun 10, 12:33 PM CDTFlash Flood WarningMRXMeigs, Rhea3 hr
Jun 10, 12:36 PM CDTSevere Thunderstorm WarningMRXBlount19 min
Jun 10, 12:38 PM CDTSevere Thunderstorm WarningMRXHamilton62 min
Jun 10, 12:40 PM CDTSevere Thunderstorm WarningMRXBradley65 min
Jun 10, 1:31 PM CDTTornado WarningMRXBradley64 min
Jun 10, 1:34 PM CDTSevere Thunderstorm WarningMRXHamilton61 min
Jun 10, 1:34 PM CDTSevere Thunderstorm WarningMRXPolk61 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.