Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 1691

July 22, 2011Jay County, Randolph County, Wayne County, Indiana; 47 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2011, 4:32 PM EDT for Jay County, Randolph County, Wayne County, Indiana; 47 counties in Ohio. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jul 22, 2011, 4:32 PM EDT (20:32 UTC)
Expired
Jul 22, 2011, 6:00 PM EDT
In force
88 min
Issued by
the Storm Prediction Center
All 50 counties

Jay County, IN, Randolph County, IN, Wayne County, IN, Allen County, OH, Ashland County, OH, Auglaize County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Hocking County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Medina County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Muskingum County, OH, Ottawa County, OH, Perry County, OH, Pickaway County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Ross County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 134 km from the middle of the area, began a volume at 20:34 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.5 hours before the alert went out and 132 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 2011-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3503 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 2011-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.1939Sfc1 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
3503 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
912 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
25 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.

IssuedProductOfficeCountiesLasted
Jul 22, 11:20 AM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 29 more55 min
Jul 22, 12:50 PM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 29 more55 min
Jul 22, 1:14 PM EDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Cass, DeKalb, Elkhart and 18 more7 hr
Jul 22, 3:17 PM EDTMesoscale DiscussionSPCBelmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 4 more58 min
Jul 22, 5:19 PM EDTMesoscale DiscussionSPCBelmont, Carroll, Columbiana, Coshocton, Geauga, Guernsey and 11 more56 min
Jul 22, 5:37 PM EDTSevere Thunderstorm WatchSPCBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more4 hr
Jul 22, 5:59 PM EDTMesoscale DiscussionSPCGallia, Lawrence2 hr
Jul 22, 7:10 PM EDTMesoscale DiscussionSPCClark, Clinton, Coshocton, Delaware, Fairfield, Fayette and 14 more35 min

Nearby

Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Indiana, 2011Every mesoscale discussion in 2011

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.