Alert archive / West Virginia / Mesoscale Discussions in 2019

Mesoscale Discussion 883

May 29, 20198 counties in Kentucky; 6 counties in Ohio; 40 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at May 29, 2019, 1:54 PM EDT for 8 counties in Kentucky; 6 counties in Ohio; 40 counties in West Virginia. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 29, 2019, 1:54 PM EDT (17:54 UTC)
Expired
May 29, 2019, 4:00 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 54 counties

Boyd County, KY, Carter County, KY, Elliott County, KY, Greenup County, KY, Johnson County, KY, Lawrence County, KY, Martin County, KY, Rowan County, KY, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Washington County, OH, 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, Mason County, WV, Mingo County, WV, Monongalia County, WV, Nicholas 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 radar

The Charleston,WV radar (KRLX), 38 km from the middle of the area, began a volume at 17:57 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, 5.9 hours before the alert went out and 216 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 2019-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 772 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 2019-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 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
772 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
847 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
93 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 29, 10:06 AM EDTMesoscale DiscussionSPCAdair, Anderson, Ballard, Barren, Bath, Bourbon and 77 more114 min
May 29, 11:31 AM EDTMesoscale DiscussionSPCBoyd, Carter, Elliott, Greenup, Johnson, Lawrence and 2 more119 min
May 29, 11:52 AM EDTSevere Thunderstorm WatchSPCBoyd, Carter, Greenup, Lawrence6 hr
May 29, 2:59 PM EDTMesoscale DiscussionSPCAllen, Barren, Butler, Edmonson, Logan, Simpson and 1 more2 hr
May 29, 12:06 PM EDTMesoscale DiscussionSPCBelmont, Carroll, Columbiana, Harrison, Jefferson, Mahoning84 min
May 29, 12:56 PM EDTSevere Thunderstorm WatchSPCBelmont, Carroll, Columbiana, Harrison, Jefferson, Tuscarawas6 hr
May 29, 3:17 PM EDTMesoscale DiscussionSPCBelmont, Jefferson118 min
May 29, 2:21 PM EDTMesoscale DiscussionSPCBoone, Fayette, Grant, Hampshire, Hardy, Mineral and 6 more114 min
May 29, 3:41 PM EDTSevere Thunderstorm WatchSPCGreenbrier, Mercer, Monroe, Summers4 hr

Nearby

Mesoscale Discussions in West Virginia, 2019Mesoscale Discussions in Kentucky, 2019Mesoscale Discussions in Ohio, 2019Every mesoscale discussion in 2019

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.