Alert archive / Kentucky / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 21, NWS Paducah, KY

February 20, 2007Graves County, Hickman County, Kentucky

NWS Paducah, KY issued this severe thunderstorm warning at Feb 20, 2007, 7:51 PM CST for Graves County, Hickman County, Kentucky. It was in force for 39 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Feb 20, 2007, 7:51 PM CST (01:51 UTC)
Expired: Feb 20, 2007, 8:30 PM CST
In force: 39 min
Issued by: NWS Paducah, KY
Area: Counties, with a storm outline in the text

Counties Graves County, KY, Hickman County, KY

The radar

The Paducah radar (KPAH), 45 km from the middle of the area, began a volume at 01:51 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
Feb 20, 8:10 PM CST	HAIL 0.88	2 S Mayfield, KY

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Feb 20, 5:07 PM CST	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.9 hours before the alert went out and 205 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: 320 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 846 m above ground
0-6 km bulk shear: 73 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 420 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS53 KPAH 210151
SVRPAH
KYC083-105-210230-
/O.NEW.KPAH.SV.W.0021.070221T0151Z-070221T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PADUCAH KY
751 PM CST TUE FEB 20 2007

THE NATIONAL WEATHER SERVICE IN PADUCAH KENTUCKY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRAVES COUNTY IN WESTERN KENTUCKY.
  HICKMAN COUNTY IN WESTERN KENTUCKY.

* UNTIL 830 PM CST.

* AT 745 PM CST...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS
  LOCATED NEAR FANCY FARM...AND MOVING EAST AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE LYNNVILLE...FULGHAM...WINGO...
  WATER VALLEY AND MAYFIELD.

SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

LAT...LON 3683 8883 3668 8899 3659 8900 3658 8890
      3650 8881 3651 8850 3682 8849

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 20, 7:04 PM CST	Severe Thunderstorm Warning	PAH	Graves, Marshall	41 min
Feb 20, 7:17 PM CST	Severe Thunderstorm Warning	PAH	Ballard	28 min
Feb 20, 7:49 PM CST	Severe Thunderstorm Warning	PAH	Ballard, McCracken	26 min
Feb 20, 8:19 PM CST	Severe Thunderstorm Warning	PAH	Calloway	41 min

Nearby

Severe Thunderstorm Warnings in Kentucky, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.