Alert archive / Kentucky / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 97

March 4, 200832 counties in Kentucky; 18 counties in Virginia; 18 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Mar 4, 2008, 2:27 PM EST for 32 counties in Kentucky; 18 counties in Virginia; 18 counties in West Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 4, 2008, 2:27 PM EST (19:27 UTC)
Expired
Mar 4, 2008, 8:00 PM EST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 68 counties

Bath County, KY, Bell County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Harlan County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Rowan County, KY, Whitley County, KY, Wolfe County, KY, Bland County, VA, Buchanan County, VA, Carroll County, VA, City of Bristol, VA, City of Galax, VA, City of Norton, VA, Dickenson County, VA, Giles County, VA, Grayson County, VA, Lee County, VA, Pulaski County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Boone County, WV, Cabell County, WV, Clay County, WV, Fayette County, WV, Greenbrier County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Putnam County, WV, Raleigh County, WV, Summers County, WV, Wayne County, WV, Wyoming County, WV

The radar

The Jackson,KY radar (KJKL), 48 km from the middle of the area, began a volume at 19:31 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
50%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Mar 4, 2:30 PM ESTSevere Thunderstorm WarningJKLEstill, Jackson, Laurel, Lee, Owsley, Rockcastle30 min
Mar 4, 2:53 PM ESTSevere Thunderstorm WarningJKLBell, Clay, Knox, Laurel, Whitley37 min
Mar 4, 3:11 PM ESTSevere Thunderstorm WarningJKLBath, Fleming, Montgomery34 min
Mar 4, 3:31 PM ESTSevere Thunderstorm WarningJKLBell, Clay, Harlan, Knox, Leslie29 min
Mar 4, 6:01 PM ESTFlash Flood WarningRNKSmyth, Tazewell4 hr
Mar 4, 6:52 PM ESTFlash Flood WarningRNKBland3 hr
Mar 4, 7:11 PM ESTSevere Thunderstorm WarningRNKCarroll, Floyd, Grayson, Patrick, Pulaski, Wythe and 1 more49 min
Mar 4, 7:51 PM ESTSevere Thunderstorm WarningRNKAlleghany, Bath, Botetourt, Craig, Floyd, Franklin and 8 more54 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.5 hours before the alert went out and 217 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2008-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2008-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 296 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
485 m above ground
0-6 km bulk shear
77 kt
0-1 km storm-relative helicity
296 m²/s²
0-3 km storm-relative helicity
568 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 4, 10:38 AM ESTMesoscale DiscussionSPCAdair, Allen, Barren, Bath, Bell, Boyle and 44 more2 hr
Mar 4, 4:11 PM ESTMesoscale DiscussionSPCFloyd, Johnson, Knott, Lawrence, Letcher, Magoffin and 2 more94 min
Mar 4, 6:33 AM ESTMesoscale DiscussionSPCCharles City, Greensville, Isle of Wight, Prince George, Southampton, Surry and 6 more87 min
Mar 4, 4:31 PM ESTTornado WatchSPCAmherst, Appomattox, Bedford, Campbell, Charlotte, Floyd and 17 more8 hr
Mar 4, 5:53 PM ESTTornado WatchSPCAlbemarle, Alleghany, Amelia, Arlington, Augusta, Bath and 82 more9 hr

Nearby

Severe Thunderstorm Watches in Kentucky, 2008Severe Thunderstorm Watches in Virginia, 2008Severe Thunderstorm Watches in West Virginia, 2008Every severe thunderstorm watch in 2008

Sources

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