Alert archive / Michigan / Mesoscale Discussions in 2003

Mesoscale Discussion 347

March 28, 200315 counties in Indiana; 34 counties in Michigan; 14 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2003, 3:57 PM EST for 15 counties in Indiana; 34 counties in Michigan; 14 counties in Ohio. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Mar 28, 2003, 3:57 PM EST (20:57 UTC)
Expired
Mar 28, 2003, 6:00 PM EST
In force
2 hr
Issued by
the Storm Prediction Center
All 63 counties

Adams County, IN, Allen County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Huntington County, IN, Kosciusko County, IN, LaGrange County, IN, Miami County, IN, Noble County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Arenac County, MI, Barry County, MI, Bay County, MI, Branch County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Ionia County, MI, Isabella 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, Montcalm County, MI, Oakland County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph 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, Hancock County, OH, Hardin County, OH, Henry County, OH, Lucas County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Sandusky County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Detroit radar (KDTX), 115 km from the middle of the area, began a volume at 21:00 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 9.0 hours before the alert went out and 120 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 2003-03-28Temperature 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 2003-03-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 416 square meters per square second.19395878Sfc1 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
1115 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
416 m²/s²
0-3 km storm-relative helicity
436 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.

IssuedProductOfficeCountiesLasted
Mar 28, 8:35 AM ESTMesoscale DiscussionSPCAllen, Benton, Boone, Carroll, Cass, Clay and 41 more3 hr
Mar 28, 11:22 AM ESTMesoscale DiscussionSPCBenton, Boone, Brown, Carroll, Cass, Clay and 52 more113 min
Mar 28, 1:20 PM ESTSevere Thunderstorm WatchSPCAdams, Allen, Carroll, Cass, DeKalb, Elkhart and 15 more6 hr
Mar 28, 2:20 PM ESTSevere Thunderstorm WatchSPCBartholomew, Blackford, Boone, Brown, Clark, Clay and 51 more6 hr
Mar 28, 4:30 PM ESTMesoscale DiscussionSPCBartholomew, Blackford, Boone, Brown, Clark, Clay and 50 more2 hr
Mar 28, 6:27 PM ESTMesoscale DiscussionSPCBartholomew, Blackford, Boone, Brown, Clark, Clay and 51 more93 min
Mar 28, 12:54 PM ESTMesoscale DiscussionSPCArenac, Barry, Bay, Branch, Calhoun, Clare and 30 more2 hr
Mar 28, 5:58 PM ESTMesoscale DiscussionSPCArenac, Bay, Calhoun, Clinton, Eaton, Genesee and 21 more92 min
Mar 28, 6:00 PM ESTSevere Thunderstorm WatchSPCGenesee, Huron, Lapeer, Lenawee, Livingston, Macomb and 7 more4 hr

Nearby

Mesoscale Discussions in Michigan, 2003Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Ohio, 2003Every 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.