Alert archive / Michigan / Mesoscale Discussions in 2008

Mesoscale Discussion 1349

June 12, 200818 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2008, 11:36 PM EDT for 18 counties in Michigan. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: Jun 12, 2008, 11:36 PM EDT (03:36 UTC)
Expired: Jun 13, 2008, 12:30 AM EDT
In force: 54 min
Issued by: the Storm Prediction Center

Counties Clare County, MI, Crawford County, MI, Gladwin County, MI, Grand Traverse County, MI, Kalkaska County, MI, Lake County, MI, Mason County, MI, Mecosta County, MI, Missaukee County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Roscommon County, MI, Wexford County, MI

The radar

The NCL Michigan radar (KAPX), 100 km from the middle of the area, began a volume at 03:37 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 519Jun 13, 1:55 AM EDT

The nearest sounding before it

Detroit, MI (KDTX), launched 00:00Z, 3.6 hours before the alert went out and 213 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: 154 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 1300 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 231 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
Jun 12, 9:21 PM EDT	Mesoscale Discussion	SPC	Antrim, Benzie, Cheboygan, Clare, Crawford, Gladwin and 13 more	24 min
Jun 12, 9:35 PM EDT	Tornado Watch	SPC	Antrim, Benzie, Clare, Crawford, Gladwin, Grand Traverse and 17 more	4 hr
Jun 13, 1:04 AM EDT	Mesoscale Discussion	SPC	Bay, Benzie, Clare, Crawford, Gladwin, Grand Traverse and 16 more	86 min
Jun 13, 1:57 AM EDT	Tornado Watch	SPC	Allegan, Arenac, Barry, Bay, Clare, Clinton and 24 more	5 hr
Jun 13, 6:58 AM EDT	Mesoscale Discussion	SPC	Branch, Calhoun, Genesee, Hillsdale, Ingham, Jackson and 9 more	62 min
Jun 13, 12:27 PM EDT	Severe Thunderstorm Watch	SPC	Berrien, Branch, Cass, Hillsdale, Saint Joseph	7 hr
Jun 13, 12:51 PM EDT	Mesoscale Discussion	SPC	Lenawee	84 min
Jun 13, 2:21 PM EDT	Mesoscale Discussion	SPC	Barry, Branch, Calhoun, Clinton, Eaton, Genesee and 15 more	54 min
Jun 13, 2:39 PM EDT	Severe Thunderstorm Watch	SPC	Barry, Bay, Calhoun, Clinton, Eaton, Genesee and 20 more	4 hr

Nearby

Mesoscale Discussions in Michigan, 2008 Every mesoscale discussion in 2008

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.