Alert archive / Kentucky / Flash Flood Warnings in 1998

Flash Flood Warning 49, NWS Louisville, KY

July 20, 1998Franklin County, Scott County, Kentucky

NWS Louisville, KY issued this flash flood warning at Jul 20, 1998, 9:33 AM EDT for Franklin County, Scott County, Kentucky. It was in force for 2 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
Jul 20, 1998, 9:33 AM EDT (13:33 UTC)
Expired
Jul 20, 1998, 11:35 AM EDT
In force
2 hr
Issued by
NWS Louisville, KY
Area
Whole counties

Counties Franklin County, KY, Scott County, KY

The radar

The Louisville radar (KLVX), 111 km from the middle of the area, began a volume at 13:34 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 1.6 hours before the alert went out and 153 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, Cncnati-Daytn, OH at 12:00Z on 1998-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 550 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, Cncnati-Daytn, OH at 12:00Z on 1998-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
550 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
699 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSDF 201333
FFWSDF
KYC067-073-113-209-239-201535-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
933 AM EDT MON JUL 20 1998

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FAYETTE COUNTY IN EAST CENTRAL KENTUCKY
  FRANKLIN COUNTY IN EAST CENTRAL KENTUCKY
  JESSAMINE COUNTY IN EAST CENTRAL KENTUCKY
  SCOTT COUNTY IN EAST CENTRAL KENTUCKY
  WOODFORD COUNTY IN EAST CENTRAL KENTUCKY

* UNTIL 1135 AM EDT

* THIS MORNING... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS EAST CENTRAL KENTUCKY...
  MOVING SOUTHEAST AT 25 MPH.

* HEAVY RAIN HAS FALLEN ACROSS MUCH OF EAST CE|NTRAL KENTUCKY DURING
  THE MORNING.  MANY ROADS WERE CLOSED DUE TO HIGH WATER.  IN
  GEORGETOWN IN SCOTT COUNTY THE ELKHORN BRIDGE ON NORTH 25 HAS
  BEEN FLOODED.

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

CS


&

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 20, 6:55 AM EDTFlash Flood WarningLMKBourbon, Harrison, Nicholas115 min
Jul 20, 6:55 AM EDTFlash Flood WarningLMKClark115 min
Jul 20, 7:09 AM EDTFlash Flood WarningLMKFayette, Jessamine, Woodford2 hr
Jul 20, 7:25 AM EDTFlash Flood WarningLMKScott2 hr
Jul 20, 7:33 AM EDTFlash Flood WarningLMKFranklin2 hr
Jul 20, 9:33 AM EDTFlash Flood WarningLMKFayette, Jessamine, Woodford2 hr

Nearby

Flash Flood Warnings in Kentucky, 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.