Alert archive / Ohio / Mesoscale Discussions in 2004

Mesoscale Discussion 575

May 7, 200423 counties in Indiana; 32 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 7, 2004, 8:30 AM EST for 23 counties in Indiana; 32 counties in Ohio. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
May 7, 2004, 8:30 AM EST (13:30 UTC)
Expired
May 7, 2004, 10:00 AM EST
In force
90 min
Issued by
the Storm Prediction Center
All 55 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, Madison County, IN, Miami County, IN, Pulaski County, IN, Randolph County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allen County, OH, Auglaize County, OH, Champaign County, OH, Clark County, OH, Coshocton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Franklin County, OH, Guernsey County, OH, Hardin County, OH, Hocking County, OH, Holmes County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Paulding County, OH, Perry County, OH, Pickaway County, OH, Putnam County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 128 km from the middle of the area, began a volume at 13:33 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, 1.5 hours before the alert went out and 128 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 2004-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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 2004-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 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
2 J/kg
Mixed-layer CIN
-504 J/kg
Mixed-layer LCL
1488 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
161 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
May 6, 8:37 PM ESTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Kosciusko, LaGrange, Noble and 2 more83 min
May 6, 9:10 PM ESTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Cass, DeKalb, Elkhart and 20 more5 hr
May 7, 6:38 AM ESTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 30 more97 min
May 7, 8:30 AM ESTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 26 more6 hr
May 6, 10:05 PM ESTMesoscale DiscussionSPCAshland, Ashtabula, Cuyahoga, Geauga, Lake, Lorain and 7 more85 min
May 6, 10:20 PM ESTSevere Thunderstorm WatchSPCAshland, Ashtabula, Carroll, Columbiana, Crawford, Cuyahoga and 27 more5 hr
May 7, 2:13 AM ESTMesoscale DiscussionSPCAshtabula, Carroll, Columbiana, Cuyahoga, Erie, Geauga and 15 more62 min
May 7, 9:29 AM ESTMesoscale DiscussionSPCAthens, Belmont, Carroll, Coshocton, Guernsey, Harrison and 9 more91 min
May 7, 10:00 AM ESTSevere Thunderstorm WatchSPCAthens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 10 more6 hr
May 7, 11:49 AM ESTMesoscale DiscussionSPCAthens, Champaign, Clark, Clinton, Delaware, Fairfield and 24 more86 min
May 7, 12:49 PM ESTMesoscale DiscussionSPCAthens, Belmont, Gallia, Guernsey, Harrison, Hocking and 7 more86 min

Nearby

Mesoscale Discussions in Ohio, 2004Mesoscale Discussions in Indiana, 2004Every mesoscale discussion in 2004

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.