Alert archive / Indiana / Mesoscale Discussions in 2004

Mesoscale Discussion 844

May 23, 200425 counties in Indiana; 25 counties in Michigan; 14 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 23, 2004, 12:35 PM EST for 25 counties in Indiana; 25 counties in Michigan; 14 counties in Ohio. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: May 23, 2004, 12:35 PM EST (17:35 UTC)
Expired: May 23, 2004, 2:30 PM EST
In force: 115 min
Issued by: the Storm Prediction Center

All 64 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Barry County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Defiance County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Henry County, OH, Lucas County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Northern Indiana radar (KIWX), 44 km from the middle of the area, began a volume at 17:39 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.

Tornado Watch 264May 23, 3:50 PM EST

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 5.6 hours before the alert went out and 201 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: 123 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 589 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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
May 23, 9:45 AM EST	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Boone, Carroll and 37 more	2 hr
May 23, 10:10 AM EST	Tornado Watch	SPC	Adams, Allen, Blackford, Carroll, Cass, Clinton and 21 more	6 hr
May 23, 10:45 AM EST	Tornado Watch	SPC	Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 35 more	5 hr
May 23, 12:45 PM EST	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 33 more	2 hr
May 23, 2:53 PM EST	Mesoscale Discussion	SPC	Adams, Allen, Benton, Blackford, Carroll, Cass and 29 more	67 min
May 23, 3:50 PM EST	Tornado Watch	SPC	Allen, Benton, Carroll, Cass, DeKalb, Elkhart and 21 more	6 hr
May 23, 5:30 PM EST	Tornado Watch	SPC	Adams, Bartholomew, Blackford, Boone, Brown, Clay and 41 more	6 hr
May 23, 6:30 PM EST	Mesoscale Discussion	SPC	Allen, Benton, Carroll, Cass, DeKalb, Elkhart and 21 more	2 hr

Nearby

Mesoscale Discussions in Indiana, 2004 Mesoscale Discussions in Michigan, 2004 Mesoscale Discussions in Ohio, 2004 Every 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.