Alert archive / Tennessee / Flash Flood Warnings in 1998

Flash Flood Warning 32, NWS Morristown, TN

April 18, 1998Cumberland County, Morgan County, Tennessee

NWS Morristown, TN issued this flash flood warning at Apr 18, 1998, 5:28 PM CDT for Cumberland County, Morgan County, Tennessee. It was in force for 5 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 18, 1998, 5:28 PM CDT (22:28 UTC)
Expired
Apr 18, 1998, 10:30 PM CDT
In force
5 hr
Issued by
NWS Morristown, TN
Area
Whole counties

Counties Cumberland County, TN, Morgan County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 10.5 hours before the alert went out and 160 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 1998-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1998-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.1939587897117Sfc1 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
940 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
235 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 182229
FFWMRX
TNC035-129-190330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
628 PM EDT (528 PM CDT) SAT APR 18 1998

THE NATIONAL WEATHER SERVICE IN KNOXV

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 18, 1:45 PM CDT, 3 hours 43 minutes earlier.

Area forecast discussion, Apr 18, 1:45 PM CDT, 3 hours 43 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE KNOXVILLE/TRI-CITIES TN
245 PM EDT SAT APR 18 1998

QUICK UPDATE WHILE I HAVE TIME.  ALL LOOKS ON TRACK...ESP THE WATCHES.
RDU WILL EXTEND FFA THROUGH TO MID DAY SUNDAY. RECOMMEND CRW EXTEND FFA
THROUGH SUNDAY MORNING AT LEAST AS WELL.  HAVE FLOODING IN HANCOCK COUNTY
TENNESSEE ATTM.  CLINCH RIVER IS OUT OF BANKS THERE STILL AND GROWING.
HAVE ISSUED URBAN/SMALL STREAM FOR ENTIRE CWA THROUGH 0Z.  ARE BRINGING
IN EXTRA STAFF FOR EVENING. ONLY SUGGESTION IS THAT I BLV THE SFC LOW
WILL TRACK UP THE TROF TOMORROW AND PLACEMENT SUGGESTS THAT AT LEAST THE
NORTHERN CUMBERLAND PLATEAU COUNTIES AND PERHAPS OVER TO AROUND HANCOCK
COUNTY WILL BE WEST OF THE LOW AND LO LVL CAA MAY KEEP HIGH TEMPS DOWN
BELOW CURRENT SUNDAY FCST. SUGGEST DROPPING THEM A FEW DEGREES.

GOTTA RUN...PHONES AND STATEMENTS CALLING.

B**2

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.