Alert archive / Ohio / Mesoscale Discussions in 2019

Mesoscale Discussion 650

May 17, 20194 states

The Storm Prediction Center issued this mesoscale discussion at May 17, 2019, 3:17 PM EDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 17, 2019, 3:17 PM EDT (19:17 UTC)
Expired: May 17, 2019, 4:45 PM EDT
In force: 88 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 98 counties

Blackford County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Hancock County, IN, Henry County, IN, Jay County, IN, Madison County, IN, Ohio County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Allen County, OH, Athens County, OH, Auglaize County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hardin County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Meigs County, OH, Mercer County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wyandot County, OH, Cabell County, WV, Jackson County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Tyler County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 43 km from the middle of the area, began a volume at 19:18 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.

Severe Thunderstorm Watch 174May 17, 4:45 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.3 hours before the alert went out and 41 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 76 J/kg
Mixed-layer CIN: -252 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 175 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.

Issued	Product	Office	Counties	Lasted
May 16, 8:57 PM EDT	Severe Thunderstorm Watch	SPC	Benton	6 hr
May 16, 9:57 PM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, DeKalb, Delaware, Jay and 3 more	2 hr
May 17, 12:12 AM EDT	Mesoscale Discussion	SPC	Benton	2 hr
May 17, 1:56 AM EDT	Mesoscale Discussion	SPC	Dearborn, Franklin, Ohio, Randolph, Union, Wayne	3 hr
May 17, 4:43 PM EDT	Severe Thunderstorm Watch	SPC	Dearborn, Franklin, Ohio, Ripley, Switzerland	6 hr
May 17, 7:37 PM EDT	Mesoscale Discussion	SPC	Boyd, Carter, Elliott, Greenup, Lawrence, Martin	113 min

Nearby

Mesoscale Discussions in Ohio, 2019 Mesoscale Discussions in Indiana, 2019 Mesoscale Discussions in Kentucky, 2019 Every 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.