Alert archive / Kentucky / Mesoscale Discussions in 2004

Mesoscale Discussion 958

May 27, 200427 counties in Kentucky; Buchanan County, Dickenson County, Virginia; 11 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 27, 2004, 9:53 PM EDT for 27 counties in Kentucky; Buchanan County, Dickenson County, Virginia; 11 counties in West Virginia. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 27, 2004, 9:53 PM EDT (01:53 UTC)
Expired
May 27, 2004, 11:30 PM EDT
In force
97 min
Issued by
the Storm Prediction Center
All 40 counties

Boyle County, KY, Breathitt County, KY, Casey County, KY, Clay County, KY, Estill County, KY, Floyd County, KY, Garrard County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Lee County, KY, Letcher County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Marion County, KY, Martin County, KY, Menifee County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Rockcastle County, KY, Taylor County, KY, Washington County, KY, Wolfe County, KY, Buchanan County, VA, Dickenson County, VA, Boone County, WV, Fayette County, WV, Greenbrier County, WV, Logan County, WV, McDowell County, WV, Mingo County, WV, Monroe County, WV, Pocahontas County, WV, Raleigh County, WV, Summers County, WV, Wyoming County, WV

The radar

The Jackson,KY radar (KJKL), 31 km from the middle of the area, began a volume at 01:53 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 1.9 hours before the alert went out and 220 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 00:00Z on 2004-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 290 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 2004-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 197 square meters per square second.1939587897117136Sfc1 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
290 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
1105 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
197 m²/s²
0-3 km storm-relative helicity
353 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 27, 8:12 PM EDTMesoscale DiscussionSPCAllen, Ballard, Barren, Breckinridge, Bullitt, Butler and 37 more93 min
May 27, 8:40 PM EDTTornado WatchSPCBreckinridge, Bullitt, Butler, Caldwell, Crittenden, Daviess and 17 more5 hr
May 27, 10:30 PM EDTTornado WatchSPCBell, Boyle, Breathitt, Casey, Clay, Clinton and 30 more6 hr
May 27, 10:39 PM EDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Boyd, Carter, Elliott and 15 more96 min
May 27, 11:27 PM EDTMesoscale DiscussionSPCBreckinridge, Bullitt, Butler, Caldwell, Crittenden, Daviess and 16 more93 min
May 28, 12:17 AM EDTMesoscale DiscussionSPCAnderson, Bath, Bell, Bourbon, Boyd, Boyle and 50 more58 min
May 27, 9:01 PM EDTMesoscale DiscussionSPCAlbemarle, Arlington, Augusta, Caroline, Clarke, Culpeper and 33 more89 min
May 28, 12:29 PM EDTMesoscale DiscussionSPCBarbour, Braxton, Cabell, Calhoun, Clay, Doddridge and 21 more3 hr

Nearby

Mesoscale Discussions in Kentucky, 2004Mesoscale Discussions in West Virginia, 2004Mesoscale Discussions in Virginia, 2004Every mesoscale discussion in 2004

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.