Alert archive / Kentucky / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 101, NWS Louisville, KY

August 19, 1999Jefferson County, Kentucky

NWS Louisville, KY issued this severe thunderstorm warning at Aug 19, 1999, 12:33 PM EDT for Jefferson County, Kentucky. It was in force for 17 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: Aug 19, 1999, 12:33 PM EDT (16:33 UTC)
Expired: Aug 19, 1999, 12:50 PM EDT
In force: 17 min
Issued by: NWS Louisville, KY
Area: Whole counties

County Jefferson County, KY

The radar

The Louisville radar (KLVX), 34 km from the middle of the area, began a volume at 16:33 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.

What was reported inside it

Time	Report	Where	Remark
Aug 19, 12:40 PM EDT	Thunderstorm Wind	Middletown, KY	Windows were cracked at Eastern High School

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.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.6 hours before the alert went out and 212 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1471 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 140 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Louisville, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 19, 4:25 AM EDT, 8 hours 8 minutes earlier.

Area forecast discussion, Aug 19, 4:25 AM EDT, 8 hours 8 minutes before

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In the hours before

Local storm report, Aug 19, 11:48 AM EDT, 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1148 AM EDT THU AUG 19 1999

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

1130 AM    SALEM                     IN    .75 INCH HAIL
08/19/99   WASHINGTON                      DIME TO QUARTER SIZE
                                           HAIL JUST SOUTH OF SALEM.

Local storm report, Aug 19, 11:48 AM EDT, 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1148 AM EDT THU AUG 19 1999

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

1130 AM    SALEM                     IN    .75 INCH HAIL
08/19/99   WASHINGTON                      DIME TO QUARTER SIZE
                                           HAIL JUST SOUTH OF SALEM.

Local storm report, Aug 19, 12:14 PM EDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1214 PM EDT THU AUG 19 1999

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

1155 AM    PLEASURE RIDGE PARK       KY    WIND DAMAGE
08/19/99   JEFFERSON                       TREES AND POWER LINES
                                           DOWN.

1157 AM    LOUISVILLE ARPT           KY    56 MPH TSTM GUST
08/19/99   JEFFERSON                       MEASURED WIND GUST AT
                                           LOUISVILLE
                                           INTERNATIONAL AIRPORT.

Local storm report, Aug 19, 12:14 PM EDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1214 PM EDT THU AUG 19 1999

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

1155 AM    PLEASURE RIDGE PARK       KY    WIND DAMAGE
08/19/99   JEFFERSON                       TREES AND POWER LINES
                                           DOWN.

1157 AM    LOUISVILLE ARPT           KY    56 MPH TSTM GUST
08/19/99   JEFFERSON                       MEASURED WIND GUST AT
                                           LOUISVILLE
                                           INTERNATIONAL AIRPORT.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 11:43 AM EDT	Severe Thunderstorm Warning	LMK	Jefferson	32 min
Aug 19, 11:52 AM EDT	Severe Thunderstorm Warning	LMK	Jefferson	33 min
Aug 19, 3:09 PM EDT	Severe Thunderstorm Warning	LMK	Marion, Washington	36 min
Aug 19, 3:39 PM EDT	Severe Thunderstorm Warning	LMK	Boyle	31 min
Aug 19, 4:01 PM EDT	Tornado Warning	LMK	Lincoln	29 min
Aug 19, 4:28 PM EDT	Severe Thunderstorm Warning	LMK	Garrard, Lincoln	32 min
Aug 19, 5:34 PM EDT	Severe Thunderstorm Warning	LMK	Taylor	31 min
Aug 19, 5:36 PM EDT	Severe Thunderstorm Warning	LMK	Fayette	34 min
Aug 19, 5:44 PM EDT	Severe Thunderstorm Warning	LMK	Marion	16 min
Aug 19, 6:18 PM EDT	Severe Thunderstorm Warning	LMK	Taylor	17 min
Aug 19, 6:47 PM EDT	Severe Thunderstorm Warning	LMK	Casey	33 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 1999 Every severe thunderstorm warning in 1999

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; radar from the NEXRAD Level II archive.