Alert archive / Indiana / Mesoscale Discussions in 2003

Mesoscale Discussion 663

May 1, 200332 counties in Indiana; 30 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 1, 2003, 12:09 PM EST for 32 counties in Indiana; 30 counties in Ohio. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 1, 2003, 12:09 PM EST (17:09 UTC)
Expired: May 1, 2003, 2:45 PM EST
In force: 3 hr
Issued by: the Storm Prediction Center

All 62 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Delaware County, IN, Fayette County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, Allen County, OH, Ashland County, OH, Auglaize County, OH, Champaign County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Erie County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Knox County, OH, Logan County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Wood County, OH, Wyandot County, OH

The radar

The Northern Indiana radar (KIWX), 132 km from the middle of the area, began a volume at 17:11 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 198May 1, 12:50 PM EST

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 5.2 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-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: 354 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1165 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 101 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
Apr 30, 7:31 PM EST	Mesoscale Discussion	SPC	Allen, DeKalb, Elkhart, Fulton, Huntington, Jasper and 15 more	119 min
Apr 30, 10:31 PM EST	Mesoscale Discussion	SPC	Allen, DeKalb, Elkhart, Fulton, Huntington, Jasper and 15 more	89 min
Apr 30, 10:55 PM EST	Severe Thunderstorm Watch	SPC	Benton, Jasper, Lake, Newton, Porter	5 hr
May 1, 1:19 AM EST	Mesoscale Discussion	SPC	Benton, Jasper, Lake, Newton	86 min
May 1, 7:51 AM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clay, Daviess, Dubois, Gibson and 22 more	114 min
May 1, 12:15 PM EST	Severe Thunderstorm Watch	SPC	Crawford, Dubois, Floyd, Gibson, Harrison, Perry and 5 more	5 hr
May 1, 12:50 PM EST	Severe Thunderstorm Watch	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Clay and 43 more	5 hr
May 1, 3:10 PM EST	Mesoscale Discussion	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Clay and 35 more	95 min
Apr 30, 8:48 PM EST	Mesoscale Discussion	SPC	Allen, Ashland, Auglaize, Crawford, Cuyahoga, Defiance and 25 more	87 min
May 1, 11:41 AM EST	Mesoscale Discussion	SPC	Columbiana, Mahoning, Portage, Trumbull	3 hr
May 1, 2:35 PM EST	Severe Thunderstorm Watch	SPC	Adams, Brown, Clermont, Highland, Jackson, Pike and 2 more	5 hr
May 1, 5:11 PM EST	Mesoscale Discussion	SPC	Adams, Brown, Clermont, Hamilton, Highland, Jackson and 4 more	94 min
May 1, 5:55 PM EST	Severe Thunderstorm Watch	SPC	Ashland, Auglaize, Butler, Champaign, Clark, Clinton and 24 more	4 hr
May 1, 6:10 PM EST	Mesoscale Discussion	SPC	Adams, Brown, Clermont, Hamilton, Highland, Jackson and 4 more	95 min

Nearby

Mesoscale Discussions in Indiana, 2003 Mesoscale Discussions in Ohio, 2003 Every mesoscale discussion in 2003

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.