Alert archive / Ohio / Mesoscale Discussions in 2012

Mesoscale Discussion 1600

July 26, 20126 states

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2012, 12:26 PM EDT for 6 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 26, 2012, 12:26 PM EDT (16:26 UTC)
Expired
Jul 26, 2012, 2:30 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
95%
All 159 counties

Bartholomew County, IN, Blackford County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Ohio County, IN, Orange County, IN, Owen County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Wayne County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Kenton County, KY, Mason County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Shelby County, KY, Trimble County, KY, Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Chemung County, NY, Schuyler County, NY, Steuben County, NY, Adams County, OH, Allen County, OH, Ashland County, OH, Ashtabula County, OH, Auglaize County, OH, Belmont County, OH, Brown County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Geauga County, OH, Greene County, OH, Guernsey County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami 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, Portage County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Seneca County, OH, Shelby County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Vinton County, OH, Warren County, OH, Wayne County, OH, Wyandot County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Cameron County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Potter County, PA, Tioga County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV

The radar

The Cincinnati radar (KILN), 139 km from the middle of the area, began a volume at 16:29 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, 4.4 hours before the alert went out and 137 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 2012-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1791 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 2012-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 262 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
1791 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
1055 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
262 m²/s²
0-3 km storm-relative helicity
287 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.4

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
Jul 26, 2:40 AM EDTMesoscale DiscussionSPCElkhart, LaGrange, Lake, LaPorte, Porter, Saint Joseph and 1 more65 min
Jul 26, 1:16 PM EDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more9 hr
Jul 26, 2:46 PM EDTSevere Thunderstorm WatchSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 29 more10 hr
Jul 26, 4:55 PM EDTMesoscale DiscussionSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 29 more35 min
Jul 26, 7:29 PM EDTMesoscale DiscussionSPCPosey61 min
Jul 26, 2:25 PM EDTMesoscale DiscussionSPCBallard, Carlisle, Livingston, McCracken65 min
Jul 26, 3:37 PM EDTMesoscale DiscussionSPCBoone, Boyd, Bracken, Campbell, Carter, Fleming and 8 more113 min
Jul 26, 4:57 PM EDTMesoscale DiscussionSPCBath, Bourbon, Breathitt, Carter, Casey, Clark and 30 more2 hr
Jul 26, 6:06 PM EDTMesoscale DiscussionSPCBoyd, Greenup, Lewis84 min
Jul 26, 6:26 PM EDTSevere Thunderstorm WatchSPCBath, Boyd, Breathitt, Carter, Clay, Elliott and 24 more7 hr
Jul 26, 1:15 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 4 more2 hr
Jul 26, 4:31 AM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Chautauqua, Chemung, Livingston, Ontario and 5 more89 min
Jul 26, 1:50 PM EDTMesoscale DiscussionSPCAlbany, Broome, Chemung, Chenango, Columbia, Cortland and 22 more115 min
Jul 26, 2:10 PM EDTTornado WatchSPCAlbany, Broome, Cayuga, Chemung, Chenango, Columbia and 26 more6 hr
Jul 26, 3:57 PM EDTSevere Thunderstorm WatchSPCBronx, Kings, Nassau, New York, Orange, Putnam and 5 more6 hr
Jul 26, 6:04 PM EDTMesoscale DiscussionSPCBronx, Columbia, Dutchess, Kings, Nassau, New York and 9 more86 min
Jul 26, 7:28 PM EDTMesoscale DiscussionSPCBronx, Dutchess, Kings, Nassau, New York, Putnam and 5 more92 min
Jul 26, 3:08 PM EDTMesoscale DiscussionSPCHampshire, Hardy, Jefferson2 hr
Jul 26, 5:54 PM EDTSevere Thunderstorm WatchSPCBerkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more6 hr

Nearby

Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Pennsylvania, 2012Every mesoscale discussion in 2012

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.