Alert archive / Michigan / Mesoscale Discussions in 2007

Mesoscale Discussion 814

May 15, 200712 counties in Indiana; 28 counties in Michigan; 8 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 15, 2007, 7:25 PM EDT for 12 counties in Indiana; 28 counties in Michigan; 8 counties in Ohio. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
May 15, 2007, 7:25 PM EDT (23:25 UTC)
Expired
May 15, 2007, 8:30 PM EDT
In force
65 min
Issued by
the Storm Prediction Center
All 48 counties

Adams County, IN, Allen County, IN, Blackford County, IN, DeKalb County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, LaGrange County, IN, Noble County, IN, Steuben County, IN, Wells County, IN, Whitley County, IN, Arenac County, MI, Barry County, MI, Bay County, MI, Branch County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Midland County, MI, Monroe County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH

The radar

The Detroit radar (KDTX), 89 km from the middle of the area, began a volume at 23:27 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, 11.4 hours before the alert went out and 93 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-pSkew-T log-p diagram, Detroit, MI at 12:00Z on 2007-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Detroit, MI at 12:00Z on 2007-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1711 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
162 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.

IssuedProductOfficeCountiesLasted
May 15, 1:15 PM EDTMesoscale DiscussionSPCBenton, Carroll, Cass, Clay, Clinton, DeKalb and 28 more90 min
May 15, 1:53 PM EDTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 33 more7 hr
May 15, 4:32 PM EDTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 33 more58 min
May 15, 5:58 PM EDTMesoscale DiscussionSPCGibson, Knox, Pike, Posey, Vanderburgh, Warrick62 min
May 15, 6:25 PM EDTMesoscale DiscussionSPCBoone, Brown, Clay, Daviess, Gibson, Greene and 16 more35 min
May 14, 10:56 PM EDTMesoscale DiscussionSPCBaraga, Dickinson, Iron, Marquette, Menominee64 min
May 15, 4:02 AM EDTMesoscale DiscussionSPCArenac, Bay, Clare, Gladwin, Gratiot, Isabella and 7 more88 min

Nearby

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