Alert archive / Michigan / Mesoscale Discussions in 2007

Mesoscale Discussion 58

January 14, 200712 counties in Indiana; 17 counties in Michigan; 6 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jan 14, 2007, 7:39 AM EST for 12 counties in Indiana; 17 counties in Michigan; 6 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jan 14, 2007, 7:39 AM EST (12:39 UTC)
Expired: Jan 14, 2007, 1:45 PM EST
In force: 6 hr
Issued by: the Storm Prediction Center

All 35 counties

DeKalb County, IN, Elkhart County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Marshall County, IN, Noble County, IN, Porter County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Eaton County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Lenawee County, MI, Livingston County, MI, Monroe County, MI, Saint Joseph County, MI, Van Buren County, MI, Washtenaw County, MI, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Williams County, OH, Wood County, OH

The radar

The Northern Indiana radar (KIWX), 71 km from the middle of the area, began a volume at 12:39 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 nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 0.7 hours before the alert went out and 178 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 449 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 198 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
Jan 14, 1:21 AM EST	Mesoscale Discussion	SPC	Allen, DeKalb, Elkhart, Fulton, Jasper, Kosciusko and 12 more	5 hr

Nearby

Mesoscale Discussions in Michigan, 2007 Mesoscale Discussions in Indiana, 2007 Mesoscale Discussions in Ohio, 2007 Every mesoscale discussion in 2007

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.