Alert archive / Michigan / Mesoscale Discussions in 2011

Mesoscale Discussion 890

May 23, 201119 counties in Indiana; 27 counties in Michigan; 12 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 23, 2011, 12:35 PM EDT for 19 counties in Indiana; 27 counties in Michigan; 12 counties in Ohio. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 23, 2011, 12:35 PM EDT (16:35 UTC)
Expired
May 23, 2011, 2:00 PM EDT
In force
85 min
Issued by
the Storm Prediction Center
All 58 counties

Adams County, IN, Allen County, IN, Blackford County, IN, Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Steuben County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Arenac County, MI, Bay County, MI, Branch County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Huron County, MI, Ingham County, MI, Jackson County, MI, Kalamazoo County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe 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, Auglaize County, OH, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Mercer County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH

The radar

The Detroit radar (KDTX), 112 km from the middle of the area, began a volume at 16:37 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, 4.6 hours before the alert went out and 117 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 2011-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 181 joules per kilogram.LCLLFCEL10008507005003002001001 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 2011-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
181 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
746 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

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 22, 8:20 PM EDTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 33 more115 min
May 22, 10:35 PM EDTMesoscale DiscussionSPCLake55 min
May 22, 10:59 PM EDTMesoscale DiscussionSPCAllen, Carroll, Cass, DeKalb, Elkhart, Fulton and 14 more61 min
May 22, 11:24 PM EDTMesoscale DiscussionSPCVermillion, Vigo66 min
May 23, 4:20 AM EDTMesoscale DiscussionSPCClark, Floyd, Harrison, Jefferson, Ohio, Scott and 1 more85 min
May 23, 8:25 AM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 36 more65 min
May 23, 11:55 AM EDTSevere Thunderstorm WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick7 hr
May 23, 1:37 PM EDTMesoscale DiscussionSPCClay, Daviess, Gibson, Greene, Knox, Pike and 6 more83 min
May 23, 1:54 PM EDTSevere Thunderstorm WatchSPCBartholomew, Boone, Brown, Carroll, Clay, Clinton and 33 more5 hr
May 23, 2:15 PM EDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Cass, DeKalb, Elkhart and 15 more8 hr
May 23, 3:52 PM EDTMesoscale DiscussionSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 42 more53 min
May 23, 4:28 PM EDTSevere Thunderstorm WatchSPCClark, Crawford, Dearborn, Dubois, Fayette, Floyd and 12 more6 hr
May 23, 4:58 PM EDTMesoscale DiscussionSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick92 min
May 23, 6:20 PM EDTMesoscale DiscussionSPCClark, Crawford, Dearborn, Decatur, Fayette, Floyd and 15 more55 min
May 23, 6:40 PM EDTMesoscale DiscussionSPCAdams, Allen, Blackford, DeKalb, Grant, Howard and 8 more65 min
May 22, 8:09 PM EDTMesoscale DiscussionSPCAntrim, Crawford, Grand Traverse, Kalkaska, Lake, Missaukee and 3 more96 min
May 22, 8:42 PM EDTMesoscale DiscussionSPCDickinson, Iron63 min
May 23, 7:20 PM EDTMesoscale DiscussionSPCAthens, Belmont, Coshocton, Gallia, Guernsey, Harrison and 15 more85 min

Nearby

Mesoscale Discussions in Michigan, 2011Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Ohio, 2011Every mesoscale discussion in 2011

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.