Alert archive / Ohio / Mesoscale Discussions in 2015

Mesoscale Discussion 1238

June 30, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2015, 12:03 PM EDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 30, 2015, 12:03 PM EDT (16:03 UTC)
Expired
Jun 30, 2015, 2:30 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 100 counties

Dearborn County, IN, Franklin County, IN, Jefferson County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Henry County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton 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, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Madison County, OH, Meigs 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, Ross County, OH, Scioto County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Beaver County, PA, Greene County, PA, Lawrence County, PA, Washington County, PA, Brooke County, WV, Doddridge County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Marion 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), 91 km from the middle of the area, began a volume at 16:04 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, 4.1 hours before the alert went out and 89 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 2015-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 134 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 2015-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 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
134 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
728 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
104 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 30, 12:58 PM EDTSevere Thunderstorm WatchSPCClark, Dearborn, Floyd, Franklin, Jefferson, Ohio and 3 more8 hr
Jun 30, 2:32 PM EDTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Jackson, Lawrence and 3 more2 hr
Jun 30, 7:08 PM EDTMesoscale DiscussionSPCClark67 min
Jun 30, 12:55 PM EDTMesoscale DiscussionSPCBell, Breathitt, Clay, Clinton, Floyd, Harlan and 22 more3 hr
Jun 30, 1:37 PM EDTSevere Thunderstorm WatchSPCBath, Bell, Boyd, Breathitt, Carter, Clay and 30 more7 hr
Jun 30, 3:48 PM EDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Bracken, Breathitt, Carter and 34 more117 min
Jun 30, 4:33 PM EDTMesoscale DiscussionSPCMcCreary, Whitley117 min
Jun 30, 12:31 PM EDTMesoscale DiscussionSPCAdams, Berks, Bradford, Bucks, Carbon, Chester and 28 more2 hr
Jun 30, 1:21 PM EDTSevere Thunderstorm WatchSPCAdams, Bedford, Berks, Blair, Bradford, Bucks and 44 more7 hr
Jun 30, 2:57 PM EDTMesoscale DiscussionSPCBucks, Montgomery, Northampton63 min
Jun 30, 4:15 PM EDTMesoscale DiscussionSPCBerks, Bucks, Carbon, Chester, Columbia, Dauphin and 14 more2 hr
Jun 30, 7:38 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Bedford, Berks, Blair and 55 more67 min
Jun 30, 2:22 PM EDTSevere Thunderstorm WatchSPCBerkeley, Grant, Greenbrier, Hampshire, Hardy, Jefferson and 6 more7 hr

Nearby

Mesoscale Discussions in Ohio, 2015Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in West Virginia, 2015Every mesoscale discussion in 2015

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.