Alert archive / Kentucky / Mesoscale Discussions in 2020

Mesoscale Discussion 319

April 8, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2020, 10:14 PM EDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Apr 8, 2020, 10:14 PM EDT (02:14 UTC)
Expired
Apr 9, 2020, 12:45 AM EDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 68 counties

Bath County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Clay 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, Magoffin County, KY, Martin 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, Wayne County, KY, Whitley County, KY, Wolfe County, KY, Athens County, OH, Gallia County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Vinton County, OH, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Wise County, VA, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV

The radar

The Jackson,KY radar (KJKL), 56 km from the middle of the area, began a volume at 02:14 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 00:00Z, 2.2 hours before the alert went out and 175 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 2020-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2020-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2413 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
295 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 8, 8:46 PM EDTMesoscale DiscussionSPCAnderson, Ballard, Boone, Bourbon, Boyle, Bracken and 61 more119 min
Apr 8, 10:51 PM EDTTornado WatchSPCBath, Bell, Boyd, Breathitt, Carter, Clay and 31 more5 hr
Apr 8, 11:16 PM EDTSevere Thunderstorm WatchSPCLee, Russell, Scott, Washington, Wise, City of Bristol and 1 more6 hr
Apr 9, 12:50 AM EDTMesoscale DiscussionSPCAlleghany, Bath, Bland, Craig, Giles, Highland and 7 more115 min
Apr 9, 2:03 AM EDTSevere Thunderstorm WatchSPCAlbemarle, Alleghany, Amherst, Augusta, Bath, Bedford and 37 more3 hr
Apr 9, 3:36 AM EDTMesoscale DiscussionSPCAlbemarle, Alleghany, Amherst, Augusta, Bath, Bedford and 40 more84 min
Apr 9, 12:01 PM EDTSevere Thunderstorm WatchSPCArlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church4 hr

Nearby

Mesoscale Discussions in Kentucky, 2020Mesoscale Discussions in West Virginia, 2020Mesoscale Discussions in Ohio, 2020Every mesoscale discussion in 2020

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.