Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 25, NWS Morristown, TN

April 16, 19984 counties in Tennessee

NWS Morristown, TN issued this flash flood warning at Apr 16, 1998, 9:33 AM CDT 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 16, 1998, 9:33 AM CDT (14:33 UTC)
Expired
Apr 16, 1998, 2:00 PM CDT
In force
4 hr
Issued by
NWS Morristown, TN
Area
Whole counties

Counties Cumberland County, TN, Fentress County, TN, Morgan County, TN, Scott County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 2.6 hours before the alert went out and 165 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 1998-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 76 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 1998-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
76 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Apr 16, 9:18 AM CDT, 15 minutes earlier.

Area forecast discussion, Apr 16, 9:18 AM CDT, 15 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
1020 PM EDT THU APR 16 1998

BUSY MORNING WITH SEVERE CONVECTION MOVING IN FROM MIDDLE TN AND NEW STUFF
FORMING OVER CWA.  MODIFIED BNA SOUNDING LOOKS LIKE MORE OF A TORNADO
SOUNDING AS CELLS MOVE DUE EAST INCREASING HELICITY LOCALLY.  PARTS
OF LINEAR CONVECTION WILL HAVE MORE STRAIGHT LINE WIND DAMAGE.  IN
ADDITION...NEARLY SATURATED SOUNDING WITH PW OF 1.42 AT BNA WILL
RESULT IN FLOODING OF VARIOUS DEGREES AS ECHOES TRAIN.  MOST WILL BE
URBAN/SMALL STREAM FLOODING WITH ISOLATED FFW EXPECTED LATER.  DO NOT
RECOMMEND FFA ATTM...AS FLORA HAS THICKENED CONSIDERABLY AND BLV FLOODING
WILL BE MORE SPOTTY THAN WIDESPREAD TODAY.  TONIGHT MAY BE ANOTHER STORY
AS SEVERE CONVECTION WEAKENS AND TEMP/DP SPREADS NARROW.

AGREE WITH TEMPS AND POPS IN ZONES...WE MAY BE A LITTLE COOLER THAN
FORCAST IN NORTHERN ZONES AS CLOUDS KEEP SUN OUT...BUT DONT BELV AN
UPDATE IS IN ORDER.v

GOTTA RUN.

BB

In the hours before

Local storm report, Apr 16, 4:25 AM CDT, 5 hours 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
525 AM EDT THU APR 16 1998

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

440 PM     POUND AREA                VA   0.75 INCH HAIL
04/15/98   WISE                           HAIL CAUSED SERIOUS TRAFFIC
                                          PROBLEMS.  SOME HAIL POSSIBLY
                                          LARGER BUT COULD NOT BE VERIFIED.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 9:02 AM CDTTornado WarningMRXCumberland, Fentress, Morgan63 min
Apr 16, 9:30 AM CDTTornado WarningMRXAnderson, Scott65 min
Apr 16, 9:33 AM CDTFlash Flood WarningMRXClaiborne, Grainger, Hancock4 hr
Apr 16, 9:33 AM CDTFlash Flood WarningMRXAnderson, Campbell, Union4 hr
Apr 16, 11:27 AM CDTSevere Thunderstorm WarningMRXRhea33 min
Apr 16, 12:14 PM CDTSevere Thunderstorm WarningMRXMonroe46 min
Apr 16, 3:13 PM CDTSevere Thunderstorm WarningMRXClaiborne47 min
Apr 16, 3:34 PM CDTSevere Thunderstorm WarningMRXHancock46 min
Apr 16, 3:39 PM CDTSevere Thunderstorm WarningMRXHamilton61 min
Apr 16, 4:17 PM CDTSevere Thunderstorm WarningMRXBradley, McMinn, Meigs63 min
Apr 16, 4:17 PM CDTSevere Thunderstorm WarningMRXRhea63 min
Apr 16, 4:22 PM CDTTornado WarningMRXMeigs, Rhea33 min
Apr 16, 4:24 PM CDTSevere Thunderstorm WarningMRXSullivan46 min
Apr 16, 4:36 PM CDTSevere Thunderstorm WarningMRXLoudon, Roane64 min
Apr 16, 4:39 PM CDTSevere Thunderstorm WarningMRXMcMinn, Polk61 min
Apr 16, 4:47 PM CDTTornado WarningMRXPolk63 min
Apr 16, 5:00 PM CDTSevere Thunderstorm WarningMRXAnderson, Knox65 min
Apr 16, 5:00 PM CDTTornado WarningMRXMonroe45 min
Apr 16, 5:19 PM CDTSevere Thunderstorm WarningMRXCumberland1 min
Apr 16, 5:23 PM CDTSevere Thunderstorm WarningMRXCumberland57 min
Apr 16, 5:27 PM CDTSevere Thunderstorm WarningMRXGrainger, Union58 min
Apr 16, 5:37 PM CDTSevere Thunderstorm WarningMRXFentress, Morgan63 min
Apr 16, 5:38 PM CDTTornado WarningMRXCumberland62 min
Apr 16, 5:44 PM CDTSevere Thunderstorm WarningMRXMonroe31 min
Apr 16, 5:49 PM CDTTornado WarningMRXMorgan66 min
Apr 16, 5:53 PM CDTTornado WarningMRXClaiborne67 min
Apr 16, 6:07 PM CDTTornado WarningMRXHancock48 min
Apr 16, 6:12 PM CDTTornado WarningMRXCampbell33 min
Apr 16, 6:13 PM CDTSevere Thunderstorm WarningMRXBradley, Hamilton62 min
Apr 16, 6:13 PM CDTTornado WarningMRXUnion37 min
Apr 16, 6:15 PM CDTTornado WarningMRXAnderson35 min
Apr 16, 6:21 PM CDTTornado WarningMRXGrainger34 min
Apr 16, 6:23 PM CDTTornado WarningMRXScott32 min
Apr 16, 6:45 PM CDTSevere Thunderstorm WarningMRXCampbell65 min
Apr 16, 6:48 PM CDTTornado WarningMRXAnderson, Union47 min
Apr 16, 6:53 PM CDTTornado WarningMRXGrainger47 min
Apr 16, 6:58 PM CDTTornado WarningMRXClaiborne47 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.