Alert archive / Kentucky / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 56, NWS Louisville, KY

July 6, 1987Nelson County, Spencer County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Jul 6, 1987, 11:50 PM EDT for Nelson County, Spencer County, Kentucky. It was in force for 40 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 6, 1987, 11:50 PM EDT (03:50 UTC)
Expired
Jul 7, 1987, 12:30 AM EDT
In force
40 min
Issued by
NWS Louisville, KY
Area
Whole counties

Counties Nelson County, KY, Spencer County, KY

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Jul 7, 12:00 AM EDTThunderstorm Wind 0Spencer, KY
Jul 7, 12:10 AM EDTThunderstorm Wind 0Nelson, KY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Dayton/James M C, OH (KDAY), launched 00:00Z, 3.8 hours before the alert went out and 243 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, Dayton/James M C, OH at 00:00Z on 1987-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2626 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, Dayton/James M C, OH at 00:00Z on 1987-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 square meters per square second.193958Sfc1 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
2626 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
695 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
155 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 8:05 PM EDTSevere Thunderstorm WarningLMKPulaski, Rockcastle55 min
Jul 6, 11:19 PM EDTSevere Thunderstorm WarningLMKBullitt, Hardin56 min
Jul 7, 1:04 AM EDTSevere Thunderstorm WarningLMKJessamine, Woodford56 min
Jul 7, 1:15 AM EDTSevere Thunderstorm WarningLMKFayette60 min
Jul 7, 1:28 AM EDTSevere Thunderstorm WarningLMKBoyle62 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 1987Every severe thunderstorm warning in 1987

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.