Alert archive / Ohio / Mesoscale Discussions in 2020

Mesoscale Discussion 305

April 8, 202021 counties in Ohio; 19 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 8, 2020, 3:16 AM EDT for 21 counties in Ohio; 19 counties in West Virginia. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Apr 8, 2020, 3:16 AM EDT (07:16 UTC)
Expired
Apr 8, 2020, 4:45 AM EDT
In force
89 min
Issued by
the Storm Prediction Center
All 40 counties

Athens County, OH, Clark County, OH, Clinton County, OH, Fairfield County, OH, Fayette County, OH, Gallia County, OH, Greene County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Madison County, OH, Meigs County, OH, Montgomery County, OH, Morgan County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Barbour County, WV, Braxton County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Mason County, WV, Pleasants County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 120 km from the middle of the area, began a volume at 07:20 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 7.3 hours before the alert went out and 153 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 2020-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 773 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 2020-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
773 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
1493 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.5

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 7, 9:07 PM EDTSevere Thunderstorm WatchSPCAllen, Ashland, Ashtabula, Auglaize, Crawford, Cuyahoga and 33 more6 hr
Apr 7, 10:04 PM EDTMesoscale DiscussionSPCAllen, Ashland, Ashtabula, Auglaize, Carroll, Columbiana and 42 more86 min
Apr 7, 11:40 PM EDTSevere Thunderstorm WatchSPCAthens, Belmont, Carroll, Champaign, Clark, Columbiana and 31 more6 hr
Apr 8, 1:52 AM EDTMesoscale DiscussionSPCBelmont, Guernsey, Harrison, Monroe, Noble, Washington83 min
Apr 8, 5:30 AM EDTMesoscale DiscussionSPCFayette, Gallia, Highland, Jackson, Meigs, Pike and 2 more30 min
Apr 8, 12:39 PM EDTMesoscale DiscussionSPCAdams, Brown, Clermont, Gallia, Lawrence, Scioto96 min
Apr 8, 1:10 PM EDTSevere Thunderstorm WatchSPCLawrence7 hr
Apr 8, 6:52 PM EDTMesoscale DiscussionSPCAdams, Brown, Butler, Clark, Clermont, Clinton and 13 more2 hr
Apr 8, 7:24 PM EDTTornado WatchSPCAdams, Brown, Butler, Clermont, Clinton, Fayette and 9 more5 hr
Apr 8, 2:14 AM EDTSevere Thunderstorm WatchSPCBerkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 1 more2 hr
Apr 8, 3:53 AM EDTMesoscale DiscussionSPCHardy, Jefferson97 min
Apr 8, 4:05 PM EDTMesoscale DiscussionSPCBoone, Logan, McDowell, Mercer, Mingo, Monroe and 3 more85 min

Nearby

Mesoscale Discussions in Ohio, 2020Mesoscale Discussions in West Virginia, 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.