Alert archive / Kentucky / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 13, NWS Paducah, KY

January 17, 1999Caldwell County, Trigg County, Kentucky

NWS Paducah, KY issued this severe thunderstorm warning at Jan 17, 1999, 6:45 PM CST for Caldwell County, Trigg County, Kentucky. It was in force for 60 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: Jan 17, 1999, 6:45 PM CST (00:45 UTC)
Expired: Jan 17, 1999, 7:45 PM CST
In force: 60 min
Issued by: NWS Paducah, KY
Area: Whole counties

Counties Caldwell County, KY, Trigg County, KY

What was reported inside it

Time	Report	Where	Remark
Jan 17, 7:00 PM CST	Thunderstorm Wind	Princeton, KY	About a dozen trees were blown down across Caldwell County.
Jan 17, 7:00 PM CST	Thunderstorm Wind 50	Rockcastle, KY	Trees and power lines were down in the north and west parts of Trigg County.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 17, 6:30 PM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 0.8 hours before the alert went out and 147 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: 687 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 352 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.9

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 Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 17, 2:05 PM CST, 4 hours 40 minutes earlier.

Area forecast discussion, Jan 17, 2:05 PM CST, 4 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PADUCAH KY
205 PM CST SUN JAN 17 1999

WATER VAPOR IMAGERY SUPPORTS 12Z AVN TRACK OF VORT MAX FM CNTL OK TO
SE KS/SW MO BORDER...WHERE PROFILERS SHOW VORT CENTER AT 18Z WITH SE
KS PROFILER NDSK1 TURNING TO NW BETWEEN 17Z-18Z. KPAH 88D DEPICTS PRIMARY
AXIS OF PCPN MOVING THRU ERN PTNS FA THIS PM...ASSOCIATED WITH H8
WARM FRONT AND WEAK SURFACE REFLECTION OF PRE-CURSING WARM SECTOR.
PRIMARY SFC WARM FRONT AT 18Z ANALYZED JUST S OF MO/KY BORDER...WITH
SECONDARY PCPN ECHOES DEVELOPING ON KNQA/KPAH 88DS OVER SE MO/NE AR.

AM CONCERNED ABOUT DRY PUNCH UNDERNEATH NEWARD PROGESSING VORT
MAX...EVIDENT UPON IR/VIS IMAGERY OVER SRN AR. WATER VAPOR SHOWS
THIS SLOT...THOUGH NARROW...EXTENDS NWARD THRU MUCH OF MO. 12Z HAND
ANALYSIS OF H5/H7/H8 CHARTS ALREADY NICELY DEPICTED THIS LACK OF
VERTICAL EXTENT IN ATMOSPHERIC MOISTURE ABOVE H8...UNDERNEATH THE
PRIMARY WAVE. THIS HAD IN EFFECT LIMITED PCPN DEVELOPMENT TO LOWER
TROPOSPHERIC WARM FRONTAL BOUNDARIES THIS MORNING...WHICH WERE WELL
AHEAD OF THE UPPER WAVE. HOWEVER...DYNAMICAL STRENGTH OF VORTICITY
MAXIMA AND PASSAGE OF SFC FRONT/TROF WL PRECLUDE A CUT IN
POPS...PARTICULARLY CONSIDERING THE LATEST IR ENHANCEMENT OVER
SW-SCNTL MO...WHERE TSMS HAVE DEVELOPED. FOR THESE REASONS WILL
THEREFORE MAINTAIN AT LEAST LIKELY CATEGORY SHOWERS AND TSMS...AS
PRIMARY WARM FRONT PERCHED JUST TO SW AND NOSE OF UPPER JET COULD
AID UVM FIELD.

WHILE MONDAY SHOULD SEE OVERALL DEPARTURE OF SYSTEM/DECREASE IN
CLOUDS...TIME/HEIGHT CROSS SECTIONS ARE SLOW TO SCOUR OUT THE SUB H8
MOISTURE. THIS IS TRUE IN PARTICULAR FOR THE NE PTNS OF THE
FA...WHERE WRAP-AROUND MOISTURE COULD ALSO KEEP CLOUDS INTO AT LEAST
PART OF THE AFTERNOON.

.PAH...NONE.

DH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 6:05 PM CST	Severe Thunderstorm Warning	PAH	McCracken	55 min
Jan 17, 6:13 PM CST	Severe Thunderstorm Warning	PAH	Livingston	57 min
Jan 17, 6:19 PM CST	Severe Thunderstorm Warning	PAH	Graves	56 min
Jan 17, 6:24 PM CST	Severe Thunderstorm Warning	PAH	Calloway, Marshall	56 min
Jan 17, 6:35 PM CST	Severe Thunderstorm Warning	PAH	Crittenden, Lyon	55 min
Jan 17, 7:14 PM CST	Severe Thunderstorm Warning	PAH	Christian, Hopkins	56 min
Jan 17, 7:29 PM CST	Severe Thunderstorm Warning	PAH	Muhlenberg, Todd	61 min
Jan 17, 6:13 PM CST	Severe Thunderstorm Warning	PAH	Johnson	57 min
Jan 17, 6:35 PM CST	Severe Thunderstorm Warning	PAH	Hardin, Saline	55 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.