Alert archive / Ohio / Mesoscale Discussions in 2014

Mesoscale Discussion 1293

July 7, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2014, 1:18 PM EDT for 4 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2014, 1:18 PM EDT (17:18 UTC)
Expired: Jul 7, 2014, 2:45 PM EDT
In force: 87 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 52 counties

Brown County, IN, Clay County, IN, Fayette County, IN, Franklin County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Johnson County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Union County, IN, Wayne County, IN, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Darke County, OH, Delaware County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Muskingum County, OH, Preble County, OH, Shelby County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Allegheny County, PA, Beaver County, PA, Butler County, PA, Lawrence County, PA, Brooke County, WV, Hancock County, WV

The radar

The Cincinnati radar (KILN), 74 km from the middle of the area, began a volume at 17:18 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 397Jul 7, 2:45 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 5.3 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1145 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jul 7, 2:45 PM EDT	Mesoscale Discussion	SPC	Clay, Daviess, Dubois, Gibson, Greene, Knox and 9 more	90 min
Jul 7, 7:17 PM EDT	Mesoscale Discussion	SPC	Harrison, Perry	58 min
Jul 7, 2:10 PM EDT	Mesoscale Discussion	SPC	Carroll, Columbiana, Geauga, Mahoning, Portage, Stark and 1 more	65 min
Jul 7, 2:45 PM EDT	Severe Thunderstorm Watch	SPC	Allegheny, Armstrong, Beaver, Bradford, Butler, Cambria and 30 more	6 hr
Jul 7, 4:44 PM EDT	Mesoscale Discussion	SPC	Bradford, Cameron, Carbon, Centre, Clearfield, Clinton and 23 more	91 min

Nearby

Mesoscale Discussions in Ohio, 2014 Mesoscale Discussions in Indiana, 2014 Mesoscale Discussions in Pennsylvania, 2014 Every mesoscale discussion in 2014

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.