Alert archive / Michigan / Mesoscale Discussions in 2004

Mesoscale Discussion 611

May 9, 2004Steuben County, Indiana; 14 counties in Michigan; 11 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 9, 2004, 9:35 AM EST for Steuben County, Indiana; 14 counties in Michigan; 11 counties in Ohio. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
May 9, 2004, 9:35 AM EST (14:35 UTC)
Expired
May 9, 2004, 10:30 AM EST
In force
55 min
Issued by
the Storm Prediction Center
All 26 counties

Steuben County, IN, Barry County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Eaton County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Washtenaw County, MI, Wayne County, MI, Cuyahoga County, OH, Erie County, OH, Fulton County, OH, Geauga County, OH, Lake County, OH, Lorain County, OH, Lucas County, OH, Ottawa County, OH, Portage County, OH, Sandusky County, OH, Williams County, OH

The radar

The Detroit radar (KDTX), 83 km from the middle of the area, began a volume at 14:37 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.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 2.6 hours before the alert went out and 86 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 2004-05-09Temperature 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 2004-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 19 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
834 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
19 m²/s²
0-3 km storm-relative helicity
68 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 8, 7:16 PM ESTMesoscale DiscussionSPCElkhart, Kosciusko, LaGrange, Marshall, Noble, Saint Joseph and 1 more119 min
May 9, 11:48 AM ESTMesoscale DiscussionSPCDeKalb, Elkhart, LaGrange, LaPorte, Noble, Saint Joseph and 1 more2 hr
May 9, 12:55 PM ESTSevere Thunderstorm WatchSPCElkhart, LaGrange, Lake, LaPorte, Porter, Saint Joseph and 1 more6 hr
May 9, 2:46 PM ESTMesoscale DiscussionSPCElkhart, LaGrange, Lake, LaPorte, Porter, Saint Joseph and 1 more89 min
May 9, 5:17 PM ESTMesoscale DiscussionSPCElkhart, LaGrange, Lake, LaPorte, Porter, Saint Joseph and 1 more88 min
May 9, 6:50 PM ESTSevere Thunderstorm WatchSPCAllen, DeKalb, Elkhart, Fulton, Jasper, Kosciusko and 11 more4 hr
May 8, 8:46 PM ESTMesoscale DiscussionSPCClinton, Eaton, Genesee, Gratiot, Ingham, Ionia and 8 more119 min
May 8, 9:55 PM ESTMesoscale DiscussionSPCAllegan, Barry, Branch, Calhoun, Cass, Eaton and 15 more2 hr
May 9, 6:15 PM ESTSevere Thunderstorm WatchSPCGogebic, Ontonagon8 hr

Nearby

Mesoscale Discussions in Michigan, 2004Mesoscale Discussions in Ohio, 2004Mesoscale Discussions in Indiana, 2004Every 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.