Alert archive / Ohio / Mesoscale Discussions in 2017

Mesoscale Discussion 1131

June 23, 20175 states

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2017, 1:15 PM EDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 23, 2017, 1:15 PM EDT (17:15 UTC)
Expired
Jun 23, 2017, 3:15 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 63 counties

Ohio County, IN, Switzerland County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Gallatin County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Carroll County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Fairfield County, OH, Fayette County, OH, Gallia County, OH, Guernsey County, OH, Hamilton County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Licking County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Allegheny County, PA, Beaver County, PA, Greene County, PA, Lawrence County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Jackson County, WV, Marshall County, WV, Mason County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 112 km from the middle of the area, began a volume at 17:17 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, 5.3 hours before the alert went out and 110 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 2017-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 654 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 2017-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 square meters per square second.19395878Sfc1 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
654 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
531 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
180 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.6

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
Jun 23, 1:39 PM EDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 66 more2 hr
Jun 23, 2:20 PM EDTSevere Thunderstorm WatchSPCBoyd, Bracken, Carter, Greenup, Lewis, Mason and 2 more8 hr
Jun 23, 3:32 PM EDTTornado WatchSPCAdair, Allen, Barren, Bath, Bell, Bourbon and 51 more6 hr
Jun 23, 4:53 PM EDTMesoscale DiscussionSPCBracken, Greenup, Harrison, Lewis, Mason, Pendleton and 1 more2 hr
Jun 23, 5:50 PM EDTMesoscale DiscussionSPCAdair, Bath, Bell, Bourbon, Boyd, Boyle and 54 more115 min
Jun 23, 3:35 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 6 more115 min
Jun 23, 5:09 PM EDTSevere Thunderstorm WatchSPCBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more4 hr

Nearby

Mesoscale Discussions in Ohio, 2017Mesoscale Discussions in West Virginia, 2017Mesoscale Discussions in Kentucky, 2017Every mesoscale discussion in 2017

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.