Alert archive / West Virginia / Mesoscale Discussions in 2008

Mesoscale Discussion 893

May 11, 20085 states

The Storm Prediction Center issued this mesoscale discussion at May 11, 2008, 2:33 PM EDT for 5 states. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 11, 2008, 2:33 PM EDT (18:33 UTC)
Expired: May 11, 2008, 3:30 PM EDT
In force: 57 min
Issued by: the Storm Prediction Center

All 64 counties

Ashe County, NC, Watauga County, NC, Ashland County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Mahoning County, OH, Medina County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Portage County, OH, Richland County, OH, Stark County, OH, Summit County, OH, Tuscarawas County, OH, Washington County, OH, Wayne County, OH, Carter County, TN, Johnson County, TN, Bland County, VA, Giles County, VA, Grayson County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wythe County, VA, Boone County, WV, Braxton County, WV, Brooke County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Marshall County, WV, McDowell County, WV, Mercer County, WV, Nicholas County, WV, Ohio County, WV, Pleasants County, WV, Raleigh County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Tyler County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 97 km from the middle of the area, began a volume at 18:35 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.6 hours before the alert went out and 185 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: 19 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 68 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.

Issued	Product	Office	Counties	Lasted
May 11, 9:34 AM EDT	Mesoscale Discussion	SPC	Ashe, Avery, Buncombe, Graham, Haywood, Madison and 4 more	26 min
May 11, 9:52 AM EDT	Tornado Watch	SPC	Avery, Buncombe, Cherokee, Clay, Graham, Haywood and 8 more	6 hr
May 11, 1:39 PM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Beaufort, Bertie, Bladen, Brunswick and 49 more	2 hr
May 11, 2:07 PM EDT	Tornado Watch	SPC	Alamance, Alexander, Anson, Bladen, Cabarrus, Caswell and 43 more	6 hr
May 11, 4:18 PM EDT	Mesoscale Discussion	SPC	Alamance, Beaufort, Bertie, Chatham, Chowan, Cumberland and 26 more	87 min
May 11, 4:43 PM EDT	Tornado Watch	SPC	Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 23 more	6 hr
May 11, 7:30 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Brunswick, Camden, Carteret, Chowan and 20 more	90 min
May 11, 7:47 PM EDT	Severe Thunderstorm Watch	SPC	Alamance, Anson, Chatham, Cumberland, Davidson, Durham and 20 more	3 hr
May 11, 6:35 AM EDT	Mesoscale Discussion	SPC	Butler, Clermont, Darke, Hamilton, Montgomery, Preble and 1 more	115 min
May 11, 1:33 PM EDT	Mesoscale Discussion	SPC	Ashland, Athens, Belmont, Carroll, Coshocton, Crawford and 27 more	117 min
May 10, 8:08 PM EDT	Tornado Watch	SPC	Bedford, Coffee, Franklin, Giles, Grundy, Hickman and 8 more	7 hr
May 10, 8:36 PM EDT	Mesoscale Discussion	SPC	Fayette, Hardeman, Haywood, Madison, Shelby, Tipton	54 min
May 10, 10:06 PM EDT	Tornado Watch	SPC	Bradley, Hamilton, Marion, Sequatchie	7 hr
May 10, 10:21 PM EDT	Mesoscale Discussion	SPC	Chester, Decatur, Fayette, Giles, Hardeman, Hardin and 12 more	84 min
May 11, 12:32 AM EDT	Mesoscale Discussion	SPC	Franklin, Giles, Lawrence, Lincoln, Moore	118 min
May 11, 11:10 AM EDT	Mesoscale Discussion	SPC	Greene, Hawkins, Sullivan, Washington	95 min

Nearby

Mesoscale Discussions in West Virginia, 2008 Mesoscale Discussions in Ohio, 2008 Mesoscale Discussions in Virginia, 2008 Every mesoscale discussion 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.