Alert archive / Kentucky / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 69, NWS Jackson, KY

May 7, 1998Johnson County, Kentucky

NWS Jackson, KY issued this severe thunderstorm warning at May 7, 1998, 7:47 PM EDT for Johnson County, Kentucky. It was in force for 43 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: May 7, 1998, 7:47 PM EDT (23:47 UTC)
Expired: May 7, 1998, 8:30 PM EDT
In force: 43 min
Issued by: NWS Jackson, KY
Area: Whole counties

County Johnson County, KY

What was reported inside it

Time	Report	Where	Remark
May 7, 8:10 PM EDT	Hail 0.88	Nippa, 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.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 11.8 hours before the alert went out and 302 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: 4 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 712 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 147 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 Jackson, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at May 7, 2:15 PM EDT, 5 hours 32 minutes earlier.

Area forecast discussion, May 7, 2:15 PM EDT, 5 hours 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE JACKSON KY
215 PM EDT THU MAY 7 1998

SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE OUT OF TN AND INTO SE KY
THIS AFTERNOON. BATCH GOING THROUGH RIGHT NOW IS THE SECOND BATCH WITH
MORE DEVELOPING IN CENTRAL KY. VWP FROM KJKL SHOWS GOOD CORE OF 40-50
KT WINDS FROM 5-16KFT...BUT SO FAR WE HAVEN/T BEEN ABLE TO TRANSLATE
ANY OF THAT DOWN TO THE SFC.

BEST INSTABILITIES ARE STILL DEPICTED ACROSS S TN...CLOSER TO THE NOSE
OF THE JET. MAY GET A BRIEF BREAK IN THE ACTION TONIGHT BUT BREAK WILL
BE SHORT UNTIL THE NEXT PIECE OF ENERGY MOVES OUT OF TX AND INTO THE
LOWER MISS VALLEY ON FRIDAY. MODEST TO HIGH POPS WARRANTED TONIGHT
WITH LIKELY POPS IN ORDER FOR FRIDAY UNTIL THE FRONT COMES THROUGH.
CFP NOT REALLY EXPECTED HERE UNTIL LATE FRIDAY AFTERNOON OR EARLY
FRIDAY EVENING.

TEMPS WILL NOT CHANGE TOO MUCH UNTIL SAT WITH CLDS HOLDING FAST MOST
OF THAT TIME.

STORMS HAVE REACHED SVR LEVELS ALONG TN BORDER. COORD WITH MRX.

JKL  57/68/59/70  +733
LOZ  59/73/60/72  +733

INGRAM

In the hours before

Local storm report, May 7, 4:20 PM EDT, 3 hours 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON KY
420 PM EDT THU MAY 7 1998

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

420 PM     HYDEN                     KY   2.50 INCH HAIL
05/07/98   LESLIE

Local storm report, May 7, 5:22 PM EDT, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSON KY
420 PM EDT THU MAY 7 1998

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

420 PM     HYDEN                     KY   2.50 INCH HAIL
05/07/98   LESLIE

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 6:52 AM EDT	Severe Thunderstorm Warning	JKL	McCreary, Pulaski	33 min
May 7, 7:14 AM EDT	Severe Thunderstorm Warning	JKL	Knox, Laurel	36 min
May 7, 7:14 AM EDT	Severe Thunderstorm Warning	JKL	Rockcastle	36 min
May 7, 7:14 AM EDT	Severe Thunderstorm Warning	JKL	Knox, Laurel	31 min
May 7, 7:14 AM EDT	Severe Thunderstorm Warning	JKL	Rockcastle	31 min
May 7, 7:28 AM EDT	Severe Thunderstorm Warning	JKL	Clay, Jackson	47 min
May 7, 1:56 PM EDT	Severe Thunderstorm Warning	JKL	Bell, Knox, Whitley	49 min
May 7, 4:35 PM EDT	Severe Thunderstorm Warning	JKL	Perry	35 min
May 7, 4:56 PM EDT	Severe Thunderstorm Warning	JKL	Knott	49 min
May 7, 5:02 PM EDT	Severe Thunderstorm Warning	JKL	Letcher	48 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 1998 Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.