Alert archive / Ohio / Mesoscale Discussions in 2004

Mesoscale Discussion 578

May 7, 200430 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 7, 2004, 12:49 PM EDT for 30 counties in Ohio. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
May 7, 2004, 12:49 PM EDT (16:49 UTC)
Expired
May 7, 2004, 2:15 PM EDT
In force
86 min
Issued by
the Storm Prediction Center
All 30 counties

Athens County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Gallia County, OH, Greene County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Knox County, OH, Licking County, OH, Madison County, OH, Meigs County, OH, Miami County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Union County, OH, Vinton County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 75 km from the middle of the area, began a volume at 16:48 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, 4.8 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-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, 9:37 PM EDTMesoscale DiscussionSPCDefiance, Erie, Fulton, Henry, Huron, Lucas and 7 more83 min
May 6, 10:10 PM EDTSevere Thunderstorm WatchSPCAllen, Crawford, Defiance, Fulton, Hancock, Henry and 11 more5 hr
May 6, 11:05 PM EDTMesoscale DiscussionSPCAshland, Ashtabula, Cuyahoga, Geauga, Lake, Lorain and 7 more85 min
May 6, 11:20 PM EDTSevere Thunderstorm WatchSPCAshland, Ashtabula, Carroll, Columbiana, Crawford, Cuyahoga and 27 more5 hr
May 7, 3:13 AM EDTMesoscale DiscussionSPCAshtabula, Carroll, Columbiana, Cuyahoga, Erie, Geauga and 15 more62 min
May 7, 7:38 AM EDTMesoscale DiscussionSPCMercer97 min
May 7, 9:30 AM EDTMesoscale DiscussionSPCAllen, Auglaize, Champaign, Clark, Coshocton, Darke and 26 more90 min
May 7, 9:30 AM EDTSevere Thunderstorm WatchSPCAllen, Auglaize, Butler, Champaign, Clark, Clinton and 24 more6 hr
May 7, 10:29 AM EDTMesoscale DiscussionSPCAthens, Belmont, Carroll, Coshocton, Guernsey, Harrison and 9 more91 min
May 7, 11:00 AM EDTSevere Thunderstorm WatchSPCAthens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 10 more6 hr
May 7, 1:49 PM EDTMesoscale DiscussionSPCAthens, Belmont, Gallia, Guernsey, Harrison, Hocking and 7 more86 min

Nearby

Mesoscale Discussions in Ohio, 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.