Alert archive / West Virginia / Mesoscale Discussions in 2003

Mesoscale Discussion 890

May 9, 2003Athens County, Hocking County, Meigs County, Ohio; 8 counties in Virginia; 17 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 8:57 PM EDT for Athens County, Hocking County, Meigs County, Ohio; 8 counties in Virginia; 17 counties in West Virginia. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: May 9, 2003, 8:57 PM EDT (00:57 UTC)
Expired: May 9, 2003, 10:00 PM EDT
In force: 63 min
Issued by: the Storm Prediction Center

All 28 counties

Athens County, OH, Hocking County, OH, Meigs County, OH, Alleghany County, VA, Bath County, VA, Botetourt County, VA, City of Buena Vista, VA, City of Covington, VA, City of Lexington, VA, Craig County, VA, Rockbridge County, VA, 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, Mason County, WV, Nicholas County, WV, Pocahontas County, WV, Ritchie County, WV, Roane County, WV, Webster County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 96 km from the middle of the area, began a volume at 00:59 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

Roanoke, VA (KRNK), launched 00:00Z, 1.0 hours before the alert went out and 171 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: 1541 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1135 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.3

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 9, 11:40 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Defiance, Fulton, Hancock, Henry, Lucas and 5 more	5 hr
May 10, 4:33 AM EDT	Mesoscale Discussion	SPC	Adams, Ashland, Athens, Auglaize, Belmont, Brown and 54 more	87 min
May 10, 11:12 AM EDT	Mesoscale Discussion	SPC	Adams, Athens, Brown, Butler, Clermont, Clinton and 15 more	2 hr
May 10, 11:54 AM EDT	Mesoscale Discussion	SPC	Butler, Clermont, Clinton, Hamilton, Highland, Preble and 1 more	66 min
May 10, 12:00 PM EDT	Tornado Watch	SPC	Adams, Brown, Butler, Champaign, Clark, Clermont and 27 more	5 hr
May 10, 1:20 PM EDT	Tornado Watch	SPC	Lawrence	6 hr
May 10, 2:04 PM EDT	Mesoscale Discussion	SPC	Adams, Brown, Butler, Champaign, Clark, Clermont and 27 more	86 min
May 10, 3:27 PM EDT	Mesoscale Discussion	SPC	Lawrence	93 min
May 10, 3:46 PM EDT	Mesoscale Discussion	SPC	Adams, Brown, Clermont, Clinton, Fayette, Gallia and 8 more	59 min
May 10, 5:56 PM EDT	Mesoscale Discussion	SPC	Lawrence	94 min
May 10, 6:30 PM EDT	Tornado Watch	SPC	Lawrence	6 hr
May 10, 12:41 PM EDT	Mesoscale Discussion	SPC	Bland, Buchanan, Carroll, Dickenson, Floyd, Franklin and 23 more	2 hr
May 10, 2:31 PM EDT	Mesoscale Discussion	SPC	Bedford, Brunswick, Campbell, Charlotte, Franklin, Greensville and 14 more	89 min
May 10, 3:15 PM EDT	Tornado Watch	SPC	Bedford, Brunswick, Campbell, Charlotte, Craig, Dinwiddie and 18 more	6 hr
May 10, 4:46 PM EDT	Mesoscale Discussion	SPC	Bedford, Brunswick, Campbell, Charlotte, Craig, Floyd and 16 more	89 min

Nearby

Mesoscale Discussions in West Virginia, 2003 Mesoscale Discussions in Virginia, 2003 Mesoscale Discussions in Ohio, 2003 Every mesoscale discussion in 2003

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.