Alert archive / Michigan / Mesoscale Discussions in 2012

Mesoscale Discussion 1598

July 26, 20124 states

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2012, 1:40 AM CDT for 4 states. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Jul 26, 2012, 1:40 AM CDT (06:40 UTC)
Expired
Jul 26, 2012, 2:45 AM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 89 counties

Boone County, IL, Bureau County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Henry County, IL, Kane County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Marshall County, IL, McHenry County, IL, Ogle County, IL, Putnam County, IL, Stark County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Elkhart County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Porter County, IN, Saint Joseph County, IN, Steuben County, IN, Allegan County, MI, Barry County, MI, Bay County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass 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, Kent County, MI, Lake County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Monroe County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saginaw County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Tuscola County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Calumet County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Jefferson County, WI, Kenosha County, WI, Manitowoc County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Grand Rapids radar (KGRR), 46 km from the middle of the area, began a volume at 06:41 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 00:00Z, 6.7 hours before the alert went out and 211 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 00:00Z on 2012-07-26Temperature 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 00:00Z on 2012-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 226 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
1843 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
226 m²/s²
0-3 km storm-relative helicity
373 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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
Jul 25, 8:40 PM CDTMesoscale DiscussionSPCCarroll, Henry, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more65 min
Jul 25, 8:57 PM CDTSevere Thunderstorm WatchSPCCarroll, Jo Daviess, Lee, Ogle, Rock Island, Stephenson and 2 more6 hr
Jul 25, 11:34 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, Henry, Jo Daviess and 7 more86 min
Jul 26, 12:09 PM CDTMesoscale DiscussionSPCBoone, McHenry2 hr
Jul 26, 1:25 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Cumberland, Edwards and 27 more65 min
Jul 26, 1:46 PM CDTSevere Thunderstorm WatchSPCAlexander, Clark, Clay, Clinton, Crawford, Cumberland and 28 more10 hr
Jul 26, 3:55 PM CDTMesoscale DiscussionSPCAlexander, Clay, Clinton, Crawford, Edwards, Franklin and 24 more35 min
Jul 26, 6:29 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hamilton, Hardin, Johnson, Massac and 5 more61 min
Jul 26, 11:26 AM CDTMesoscale DiscussionSPCBartholomew, Blackford, Brown, Clark, Clay, Crawford and 37 more2 hr
Jul 26, 12:16 PM CDTSevere Thunderstorm WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more9 hr
Jul 25, 8:28 PM CDTMesoscale DiscussionSPCArenac, Bay, Clare, Clinton, Eaton, Genesee and 34 more92 min
Jul 25, 8:47 PM CDTSevere Thunderstorm WatchSPCBay, Genesee, Huron, Lapeer, Livingston, Macomb and 9 more6 hr
Jul 25, 11:09 PM CDTMesoscale DiscussionSPCArenac, Bay, Clare, Clinton, Genesee, Gladwin and 26 more96 min
Jul 25, 7:20 PM CDTMesoscale DiscussionSPCLa Crosse85 min

Nearby

Mesoscale Discussions in Michigan, 2012Mesoscale Discussions in Illinois, 2012Mesoscale Discussions in Wisconsin, 2012Every mesoscale discussion in 2012

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.