Alert archive / West Virginia / Mesoscale Discussions in 2015

Mesoscale Discussion 229

April 8, 201523 counties in Kentucky; 17 counties in Ohio; 25 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2015, 11:52 AM EDT for 23 counties in Kentucky; 17 counties in Ohio; 25 counties in West Virginia. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Apr 8, 2015, 11:52 AM EDT (15:52 UTC)
Expired
Apr 8, 2015, 1:15 PM EDT
In force
83 min
Issued by
the Storm Prediction Center
All 65 counties

Bath County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Floyd County, KY, Greenup County, KY, Harrison County, KY, Johnson County, KY, Lawrence County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Pike County, KY, Robertson County, KY, Rowan County, KY, Adams County, OH, Athens County, OH, Fairfield County, OH, Franklin County, OH, Gallia County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Morgan County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, Mingo County, WV, Nicholas County, WV, Pleasants County, WV, Putnam County, WV, Raleigh County, WV, Ritchie County, WV, Roane County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 76 km from the middle of the area, began a volume at 15:55 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 12:00Z, 3.9 hours before the alert went out and 143 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 12:00Z on 2015-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 487 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 12:00Z on 2015-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 square meters per square second.193958Sfc1 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
487 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
711 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

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
Apr 7, 8:58 PM EDTMesoscale DiscussionSPCBell, Breathitt, Clay, Floyd, Harlan, Jackson and 14 more62 min
Apr 8, 10:16 AM EDTMesoscale DiscussionSPCBath, Boone, Bourbon, Boyd, Bracken, Campbell and 30 more119 min
Apr 8, 10:34 AM EDTSevere Thunderstorm WatchSPCBath, Boone, Bourbon, Boyd, Bracken, Campbell and 20 more5 hr
Apr 8, 12:33 PM EDTSevere Thunderstorm WatchSPCFloyd, Johnson, Lawrence, Magoffin, Martin, Menifee and 5 more5 hr
Apr 8, 1:50 PM EDTMesoscale DiscussionSPCJefferson, Oldham85 min
Apr 8, 1:51 PM EDTMesoscale DiscussionSPCBoyd, Breathitt, Carter, Elliott, Floyd, Greenup and 10 more84 min
Apr 8, 2:55 PM EDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Boyle, Breckinridge and 54 more2 hr
Apr 8, 3:22 PM EDTMesoscale DiscussionSPCBoyd, Breathitt, Clay, Elliott, Floyd, Johnson and 12 more83 min
Apr 8, 5:50 PM EDTMesoscale DiscussionSPCAdair, Anderson, Barren, Bath, Bourbon, Boyle and 50 more115 min

Nearby

Mesoscale Discussions in West Virginia, 2015Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Ohio, 2015Every mesoscale discussion in 2015

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.