Alert archive / Michigan / Mesoscale Discussions in 2003

Mesoscale Discussion 1262

June 8, 200323 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2003, 3:43 PM EDT for 23 counties in Michigan. It was in force for 107 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2003, 3:43 PM EDT (19:43 UTC)
Expired: Jun 8, 2003, 5:30 PM EDT
In force: 107 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 488

All 23 counties

Alpena County, MI, Arenac County, MI, Bay County, MI, Clinton County, MI, Crawford County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Ingham County, MI, Iosco County, MI, Isabella County, MI, Kalkaska County, MI, Lapeer County, MI, Livingston County, MI, Midland County, MI, Montmorency County, MI, Oakland County, MI, Ogemaw County, MI, Oscoda County, MI, Roscommon County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI

The radar

The Detroit radar (KDTX), 99 km from the middle of the area, began a volume at 19:45 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, 7.7 hours before the alert went out and 99 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: 197 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 1139 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 8, 10:53 AM EDT	Mesoscale Discussion	SPC	Lenawee, Macomb, Monroe, Oakland, Washtenaw, Wayne	2 hr
Jun 8, 12:47 PM EDT	Mesoscale Discussion	SPC	Antrim, Barry, Bay, Branch, Calhoun, Cheboygan and 29 more	118 min
Jun 8, 1:20 PM EDT	Severe Thunderstorm Watch	SPC	Alcona, Arenac, Barry, Bay, Benzie, Branch and 44 more	6 hr
Jun 8, 6:04 PM EDT	Mesoscale Discussion	SPC	Alcona, Alpena, Arenac, Bay, Calhoun, Clare and 32 more	56 min

Nearby

Mesoscale Discussions in Michigan, 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.