Alert archive / Ohio / Mesoscale Discussions in 2007

Mesoscale Discussion 1542

July 19, 20075 counties in Michigan; 13 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2007, 3:54 PM EDT for 5 counties in Michigan; 13 counties in Ohio. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 19, 2007, 3:54 PM EDT (19:54 UTC)
Expired: Jul 19, 2007, 5:30 PM EDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Jackson County, MI, Lenawee County, MI, Monroe County, MI, Washtenaw County, MI, Wayne County, MI, Crawford County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Henry County, OH, Huron County, OH, Lorain County, OH, Lucas County, OH, Ottawa County, OH, Sandusky County, OH, Seneca County, OH, Wood County, OH, Wyandot County, OH

The radar

The Detroit radar (KDTX), 111 km from the middle of the area, began a volume at 19:56 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, 7.9 hours before the alert went out and 113 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: 270 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 695 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 60 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
Jul 18, 8:29 PM EDT	Severe Thunderstorm Watch	SPC	Berrien, Branch, Cass, Saint Joseph	7 hr
Jul 18, 10:06 PM EDT	Mesoscale Discussion	SPC	Berrien, Branch, Cass, Hillsdale, Lenawee, Monroe and 1 more	84 min
Jul 18, 10:59 PM EDT	Severe Thunderstorm Watch	SPC	Allen, Ashland, Ashtabula, Auglaize, Belmont, Carroll and 56 more	6 hr
Jul 19, 10:09 AM EDT	Mesoscale Discussion	SPC	Gallia, Lawrence, Meigs	96 min
Jul 19, 12:45 PM EDT	Mesoscale Discussion	SPC	Adams, Brown, Butler, Clermont, Clinton, Gallia and 9 more	60 min
Jul 19, 1:07 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Butler, Clermont, Clinton, Gallia and 10 more	8 hr
Jul 19, 7:15 PM EDT	Mesoscale Discussion	SPC	Allen, Ashland, Ashtabula, Auglaize, Carroll, Champaign and 31 more	90 min

Nearby

Mesoscale Discussions in Ohio, 2007 Mesoscale Discussions in Michigan, 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.