Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 1403

June 24, 200421 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 24, 2004, 2:37 AM EDT for 21 counties in Michigan. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 24, 2004, 2:37 AM EDT (06:37 UTC)
Expired: Jun 24, 2004, 3:30 AM EDT
In force: 53 min
Issued by: the Storm Prediction Center

All 21 counties

Branch County, MI, Calhoun County, MI, Cass County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Livingston County, MI, Macomb County, MI, Oakland County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI

The radar

The Detroit radar (KDTX), 84 km from the middle of the area, began a volume at 06:38 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

Detroit, MI (KDTX), launched 00:00Z, 6.6 hours before the alert went out and 88 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: 742 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1134 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.4

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
Jun 23, 11:10 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Branch, Calhoun, Clinton, Eaton and 31 more	95 min
Jun 23, 11:30 PM EDT	Severe Thunderstorm Watch	SPC	Arenac, Barry, Bay, Branch, Calhoun, Cass and 40 more	6 hr

Nearby

Mesoscale Discussions in Michigan, 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.