Alert archive / West Virginia / Mesoscale Discussions in 2004

Mesoscale Discussion 1012

May 31, 20046 states

The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 2:40 AM EDT for 6 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 31, 2004, 2:40 AM EDT (06:40 UTC)
Expired
May 31, 2004, 4:45 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
All 151 counties

Bath County, KY, Bell County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Clark County, KY, Clay County, KY, Clinton County, KY, Cumberland County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Greenup 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, Lewis County, KY, Madison County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, McCreary County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Russell County, KY, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Garrett County, MD, Adams County, OH, Ashland County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Clinton County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Guernsey County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Lorain County, OH, Madison County, OH, Medina County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Portage County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Stark County, OH, Summit County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Fayette County, PA, Greene County, PA, Somerset County, PA, Bland County, VA, Buchanan County, VA, City of Galax, VA, City of Norton, VA, City of Radford, 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, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monongalia County, WV, Monroe County, WV, Nicholas County, WV, Ohio County, WV, Pleasants County, WV, Pocahontas County, WV, Preston County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.7 hours before the alert went out and 141 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 2004-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 778 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, Cncnati-Daytn, OH at 00:00Z on 2004-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 316 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
778 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
710 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
316 m²/s²
0-3 km storm-relative helicity
399 m²/s²
Significant tornado parameter
1.7
Supercell composite
9.6

Open this sounding in Storm Lab

The text

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

702 
ACUS11 KWNS 310640
SWOMCD
SPC MCD 310640 
PAZ000-MDZ000-WVZ000-VAZ000-OHZ000-KYZ000-310845-

MESOSCALE DISCUSSION 1012
NWS STORM PREDICTION CENTER NORMAN OK
0140 AM CDT MON MAY 31 2004

AREAS AFFECTED...OH...WV...VA...KY

CONCERNING...TORNADO WATCH 344...348...

VALID 310640Z - 310845Z

SEVERE SQUALL LINE WITH DAMAGING WINDS...AND POSSIBLY EMBEDDED
TORNADOES WILL MOVE ACROSS THE OH RIVER AND INTO TORNADO WATCH 348
SHORTLY. LATEST LINE MOTION WAS ALMOST DUE EAST AT 45-55KT WHICH
WILL BRING THE LINE ACROSS MUCH OF WV AND SWRN VA OVER THE NEXT 2-3
HOURS. LATEST UPSTREAM VWP DATA AND SHORT-TERM MODEL DATA INDICATES
THE NOSE OF 50-70KT MID LEVEL JET IS DIRECTED INTO THE BACK OF THE
SQUALL LINE. STRONGER WINDS ARE QUITE LIKELY AS THE CONVECTION
DEVELOPS INTO THE HIGHER ELEVATIONS OF THE APPALACHIANS.

..CARBIN.. 05/31/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...CTP...LWX...RNK...PBZ...RLX...CLE...MRX...JKL...ILN...LMK...

36628079 36668581 37298459 38458395 39228414 41458220
41428101 40168162 40157892

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 30, 8:21 PM EDTMesoscale DiscussionSPCAnderson, Bath, Boone, Bourbon, Boyd, Boyle and 50 more84 min
May 30, 9:20 PM EDTTornado WatchSPCAdair, Anderson, Bath, Bell, Boone, Bourbon and 69 more7 hr
May 30, 9:39 PM EDTMesoscale DiscussionSPCBreckinridge, Butler, Caldwell, Crittenden, Daviess, Graves and 13 more96 min
May 30, 11:47 PM EDTMesoscale DiscussionSPCAdair, Anderson, Barren, Bath, Boone, Bourbon and 56 more58 min
May 31, 12:40 AM EDTTornado WatchSPCFloyd, Harlan, Knott, Letcher, Martin, Pike5 hr
May 31, 4:40 AM EDTMesoscale DiscussionSPCFloyd, Harlan, Knott, Letcher, Martin, Pike95 min
May 31, 2:53 PM EDTMesoscale DiscussionSPCCalvert, Charles, Saint Mary's, Somerset37 min
May 31, 3:50 PM EDTTornado WatchSPCCalvert, Charles, Dorchester, Montgomery, Prince George's, Saint Mary's and 1 more6 hr
May 31, 7:17 PM EDTMesoscale DiscussionSPCCalvert, Charles, Dorchester, Montgomery, Prince George's, Saint Mary's and 1 more118 min
May 31, 1:50 PM EDTMesoscale DiscussionSPCWilliams55 min
May 31, 1:40 AM EDTTornado WatchSPCCity of Bristol5 hr
May 31, 5:50 AM EDTSevere Thunderstorm WatchSPCCampbell, Carroll, Charlotte, Floyd, Franklin, Halifax and 9 more5 hr
May 31, 7:56 AM EDTMesoscale DiscussionSPCBedford, Campbell, Charlotte, Franklin, Halifax, Henry and 4 more2 hr
May 31, 9:10 AM EDTSevere Thunderstorm WatchSPCMecklenburg5 hr

Nearby

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