Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 606

May 8, 200414 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at May 8, 2004, 9:46 PM EDT for 14 counties in Michigan. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: May 8, 2004, 9:46 PM EDT (01:46 UTC)
Expired: May 8, 2004, 11:45 PM EDT
In force: 119 min
Issued by: the Storm Prediction Center

Counties Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Kent County, MI, Lapeer County, MI, Livingston County, MI, Macomb County, MI, Montcalm County, MI, Oakland County, MI, Saginaw County, MI, Shiawassee County, MI

The radar

The Detroit radar (KDTX), 58 km from the middle of the area, began a volume at 01:48 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, 1.8 hours before the alert went out and 60 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: 1004 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 337 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
May 8, 10:55 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Branch, Calhoun, Cass, Eaton and 15 more	2 hr
May 9, 10:35 AM EDT	Mesoscale Discussion	SPC	Barry, Branch, Calhoun, Cass, Eaton, Hillsdale and 8 more	55 min
May 9, 12:48 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Bay, Berrien, Branch, Calhoun and 33 more	2 hr
May 9, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Bay, Berrien, Branch, Calhoun and 35 more	6 hr
May 9, 3:46 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Bay, Berrien, Branch, Calhoun and 35 more	89 min
May 9, 6:17 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Bay, Berrien, Branch, Calhoun and 33 more	88 min
May 9, 7:15 PM EDT	Severe Thunderstorm Watch	SPC	Gogebic, Ontonagon	8 hr
May 9, 7:50 PM EDT	Severe Thunderstorm Watch	SPC	Allegan, Barry, Berrien, Branch, Calhoun, Cass and 14 more	4 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.