Alert archive / Kentucky / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 54, NWS Charleston, WV

July 30, 1999Lawrence County, Kentucky

NWS Charleston, WV issued this severe thunderstorm warning at Jul 30, 1999, 7:49 PM EDT for Lawrence County, Kentucky. It was in force for 26 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: Jul 30, 1999, 7:49 PM EDT (23:49 UTC)
Expired: Jul 30, 1999, 8:15 PM EDT
In force: 26 min
Issued by: NWS Charleston, WV
Area: Whole counties

County Lawrence County, KY

What was reported inside it

Time	Report	Where	Remark
Jul 30, 7:50 PM EDT	Hail 0.75	Louisa, 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.8 hours before the alert went out and 177 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: 3564 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 983 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 10.8

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 Charleston, WV wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 30, 1:48 PM EDT, 6 hours 1 minute earlier.

Area forecast discussion, Jul 30, 1:48 PM EDT, 6 hours 1 minute before

WVZ005>011-013>020-024>040-046-047-VAZ003-004-OHZ066-067-075-076-
083>087-KYZ101>103-105-310700-

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON WV
148 PM EDT FRI JUL 30 1999

AS EXPECTED CONVECTION ALMOST GONE FROM SWRN WV EARLY THIS AFTN.
HOWEVER...MODELS INDICATE WE WILL STILL BE ON THE ERN SIDE OF THIS
UPPER RIDGE TONIGHT...BEFORE BUILDING OVER THE REGION ON SAT.  THERE
IS ACTUALLY SOME SYNOPTIC SUPPORT FOR CONVECTION TNITE AS WHAT LOOKS
TO BE A WEAK WARM ADVECTION PATTERN TO MOVE ACROSS.  ATTENDING LOW
LVL BOUNDARY ALREADY SHOWS IN THE STLT CU FIELD ACROSS NERN IN AND
SWRN OH (AND NOW APPEARS WHY THE CONVECTION TRAINED AND LASTED SO
LONG OVER SWRN WV THIS MORNING) WHICH SUPPORTS THE MODELS OPINION.
WITH THE AIR REMAINING VERY UNSTABLE WITH HIGH PW'S...IT WONT TAKE
MUCH FOR STUFF TO GET GOING.  THE MOST LIKELY AREA IS IN THE WEST
AND THEN SHIFT EWD OVERNIGHT...BUT CONFIDENCE IN THE CONVECTIVE
SEASON IS QUITE LOW...SO INTENDING TO GO WITH 30 POPS EVERYWHERE
TNITE AND EARLY SAT MORNING.  SHOULD BE HOT AND DRY MOST OF SAT
UNDER BUILDING UPR RIDGE.  WILL DROP HEAT ADVISORY FOR THIS EVENING
ON FCST PCKG AS EVERYONE KNOWS WHAT THE SITUATION IS BY THEN...BUT
WILL INTRODUCE ANOTHER FOR SAT AFTN OVER THE SAME AREA. COLD FRONT
MOVES SEWD FROM THE GREAT LAKES TO CNTRL OH BY 12Z SUN.  THIS FRONT
HAS SOME PUSH AND UPR SUPPORT SO THAT HIER CHC POPS ARE WARRANTED
WITH COOLER TEMPS UNDER MORE CLOUDS. COOLER AND DRIER AIR FOR MON
AND TUE BEFORE WARMUP AND MOISTURE AHEAD OF NEXT FRONT ON
WED.

.RLX...
WV...EXCESSIVE HEAT ADVISORY SATURDAY AFTERNOON FOR ZONES
WVZ005>011...WVZ013>017...WVZ024>027.

VA...NONE.

KY...EXCESSIVE HEA`T ADVISORY FOR SATURDAY AFTERNOON FOR ZONES
KYZ101>103...KYZ105.

OH...EXCESSIVE HEAT ADVISORY FOR SATURDAY AFTERNOON FOR ZONES
OHZ066>067...OHZ075>076...OHZ083>087.

.END/JMV

In the hours before

Local storm report, Jul 30, 5:35 PM EDT, 2 hours 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON WEST VIRGINIA
535 PM EDT FRI JUL 30 1999

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

0525 PM    PATRIOT                   OH   1.75 INCH HAIL
07/30/99   GALLIA                         COOPERATIVE OBSERVER
                                          REPORTED GOLFBALL SIZE
                                          HAIFL AT 525 PM EST 7 MILES
                                          WEST OF PATRIOT

The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 30, 3:16 AM EDT	Severe Thunderstorm Warning	RLX	Jackson, Mason	44 min
Jul 30, 5:11 AM EDT	Severe Thunderstorm Warning	RLX	Lincoln	49 min
Jul 30, 9:06 AM EDT	Flash Flood Warning	RLX	Mingo	3 hr
Jul 30, 9:38 AM EDT	Severe Thunderstorm Warning	RLX	Wayne	52 min
Jul 30, 10:28 AM EDT	Severe Thunderstorm Warning	RLX	Logan	32 min
Jul 30, 12:07 PM EDT	Severe Thunderstorm Warning	RLX	Boone	23 min
Jul 30, 5:04 PM EDT	Severe Thunderstorm Warning	RLX	Mingo, Wayne	26 min
Jul 30, 6:00 PM EDT	Severe Thunderstorm Warning	RLX	Mingo, Wayne	60 min
Jul 30, 6:01 PM EDT	Flash Flood Warning	RLX	Mingo, Wayne	119 min
Jul 30, 7:16 PM EDT	Severe Thunderstorm Warning	RLX	Wayne	59 min
Jul 30, 5:21 PM EDT	Severe Thunderstorm Warning	RLX	Gallia, Jackson, Lawrence	39 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.