Alert archive / Kentucky / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 12, NWS Louisville, KY
NWS Louisville, KY issued this severe thunderstorm warning at Jun 12, 1987, 8:05 PM EDT for Jefferson County, Kentucky. It was in force for 40 min. 1 report 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
- Jun 12, 1987, 8:05 PM EDT (00:05 UTC)
- Expired
- Jun 12, 1987, 8:45 PM EDT
- In force
- 40 min
- Issued by
- NWS Louisville, KY
- Area
- Whole counties
County Jefferson 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 8:06 PM EDT | Thunderstorm Wind 0 | Jefferson, 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, 0.1 hours before the alert went out and 228 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.
- Mixed-layer CAPE
- 1473 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 670 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.9
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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 12, 6:16 PM EDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LEXINGTON KY 615 PM EDT FRI JUN 12 1987 AT 610 PM EDT...THUNDERSTORMS WERE SCATTERED ACROSS EAST CENTRAL KENTUCKY. THE STRONGEST STORMS WERE LOCATED OVER NORTHERN BOYLE COUNTY..NORTH OF DANVILLE AND OVER CENTRAL JESSAMINE COUNTY..NEAR NICHOLASVILLE. HEAVY RAIN...STRONG GUSTY WINDS AND DEADLY LIGHTNING STRIKES CAN BE EXPECTED WITH THE PASSAGE OF THESE STORMS. RECREATION INTERESTS IN AND AROUND THE LAKE HERRINGTON AREA SHOULD SEEK INDOOR SHELTER. THE THUNDERSTORMS WERE MOVING EAST AT 30 MPH AND WILL CROSS INTO NORTHERN GARRARD AND NORTHERN MADISON COUNTIES BETWEEN 615 PM AND 700 PM EDT THIS FRIDAY EVENING. WHITE
Special weather statement, Jun 12, 7:09 PM EDT, 56 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LOUISVILLE KY 700 PM EDT FRI JUN 12 1987 STRONG THUNDERSTORMS ARE MOVING SOUTH OUT OF SOUTHERN INDIANA AND WILL APPROACH NORTHERN KENTUCKY ALONG THE OHIO RIVER BETWEEN 7 AND 9 PM EDT. THESE STRONG THUNDERSTORMS STRETCHED FROM VINCENNES INDIANA WEST ACROSS SCOTTSBURG INDIANA...LOCATED 30 MILES NORTH OF LOUISVILLE...ON WEST INTO CINCINNATI. THESE STORMS WILL LIKELY PRODUCE VERY HEAVY RAIN...STRONG GUSTY WINDS...DANGEROUS CLOUD TO GROUND LIGHTNING...AND POSSIBLY SOME SMALL HAIL. PERSONS IN THE PATH OF THESE STRONG THUNDERSTORMS SHOULD MOVE TO INDOOR SHELTER WHEN STORMS APPROACH AND CONTINUE TO LISTEN TO NOAA WEATHER RADIO FOR FURTHER UPDATES. OTHER THUNDERSTORMS STRETCH FROM SOUTH OF LEXINGTON TO FORT KNOX. A SOUTHEAST MOVEMENT OF 20 MPH WAS OBSERVED. POOLE
The office that day
Everything else NWS Louisville, KY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 8:48 PM EDT | Severe Thunderstorm Warning | LMK | Hardin | 57 min |
| Jun 12, 9:42 PM EDT | Severe Thunderstorm Warning | LMK | Larue, Nelson | 63 min |
| Jun 13, 7:19 PM EDT | Severe Thunderstorm Warning | LMK | Jefferson | 41 min |
| Jun 13, 5:24 PM EDT | Severe Thunderstorm Warning | LMK | Washington | 66 min |
| Jun 13, 6:28 PM EDT | Severe Thunderstorm Warning | LMK | Orange, Washington | 62 min |
| Jun 13, 6:58 PM EDT | Severe Thunderstorm Warning | LMK | Floyd | 47 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.