Alert archive / Virginia / Mesoscale Discussions in 2004

Mesoscale Discussion 912

May 26, 200411 counties in Kentucky; 78 counties in Virginia; 29 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 26, 2004, 1:38 PM EDT for 11 counties in Kentucky; 78 counties in Virginia; 29 counties in West Virginia. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 26, 2004, 1:38 PM EDT (17:38 UTC)
Expired
May 26, 2004, 3:15 PM EDT
In force
97 min
Issued by
the Storm Prediction Center
All 118 counties

Bell County, KY, Floyd County, KY, Harlan County, KY, Johnson County, KY, Knott County, KY, Knox County, KY, Leslie County, KY, Letcher County, KY, Martin County, KY, Perry County, KY, Pike County, KY, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buchanan County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Bristol, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Danville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Galax, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Martinsville, VA, City of Norton, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, Craig County, VA, Culpeper County, VA, Cumberland County, VA, Dickenson County, VA, Fairfax County, VA, Fauquier County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Giles County, VA, Goochland County, VA, Grayson County, VA, Greene County, VA, Halifax County, VA, Henry County, VA, Highland County, VA, Lee County, VA, Louisa County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Prince Edward County, VA, Prince William County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Russell County, VA, Scott County, VA, Shenandoah County, VA, Smyth County, VA, Spotsylvania County, VA, Stafford County, VA, Tazewell County, VA, Warren County, VA, Washington County, VA, Wise County, VA, Wythe County, VA, Boone County, WV, Braxton County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Roane County, WV, Summers County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 102 km from the middle of the area, began a volume at 17:39 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

Roanoke, VA (KRNK), launched 12:00Z, 5.6 hours before the alert went out and 136 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, Roanoke, VA at 12:00Z on 2004-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 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, Roanoke, VA at 12:00Z on 2004-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 square meters per square second.19395878Sfc1 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
3 J/kg
Mixed-layer CIN
-255 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 25, 8:28 PM EDTMesoscale DiscussionSPCAnderson, Bath, Boone, Bourbon, Boyle, Bracken and 61 more92 min
May 26, 9:50 AM EDTSevere Thunderstorm WatchSPCBreckinridge, Daviess, Hancock, Henderson, McLean, Meade and 3 more5 hr
May 26, 11:50 AM EDTMesoscale DiscussionSPCAdair, Allen, Anderson, Ballard, Barren, Bath and 90 more85 min
May 26, 12:25 PM EDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Bath, Boone and 83 more7 hr
May 26, 2:10 PM EDTTornado WatchSPCBallard, Carlisle, Fulton, Hickman, McCracken8 hr
May 26, 2:18 PM EDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Boone and 83 more87 min
May 26, 2:50 PM EDTSevere Thunderstorm WatchSPCBell, Boyd, Breathitt, Clay, Elliott, Floyd and 18 more7 hr
May 26, 4:25 PM EDTSevere Thunderstorm WatchSPCAdair, Allen, Barren, Bell, Butler, Caldwell and 37 more6 hr
May 26, 4:32 PM EDTMesoscale DiscussionSPCBallard, Carlisle, Fulton, Hickman, McCracken88 min
May 26, 6:27 PM EDTMesoscale DiscussionSPCAdair, Allen, Barren, Bell, Butler, Caldwell and 31 more93 min
May 26, 6:57 PM EDTMesoscale DiscussionSPCBallard, Carlisle, Fulton, Hickman93 min
May 25, 9:50 PM EDTMesoscale DiscussionSPCAccomack, Essex, King and Queen, Lancaster, Northumberland, Richmond and 1 more55 min
May 26, 5:45 PM EDTSevere Thunderstorm WatchSPCAlbemarle, Amelia, Amherst, Appomattox, Arlington, Augusta and 69 more5 hr
May 26, 12:55 PM EDTMesoscale DiscussionSPCBarbour, Braxton, Calhoun, Clay, Doddridge, Fayette and 26 more95 min

Nearby

Mesoscale Discussions in Virginia, 2004Mesoscale Discussions in West Virginia, 2004Mesoscale Discussions in Kentucky, 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.