Alert archive / Michigan / Mesoscale Discussions in 2005

Mesoscale Discussion 1843

July 24, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2005, 4:59 AM EST for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued
Jul 24, 2005, 4:59 AM EST (09:59 UTC)
Expired
Jul 24, 2005, 6:30 AM EST
In force
91 min
Issued by
the Storm Prediction Center
All 64 counties

DeKalb County, IN, Steuben County, IN, Antrim County, MI, Arenac County, MI, Barry County, MI, Bay County, MI, Benzie County, MI, Branch County, MI, Calhoun County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Delta County, MI, Dickinson County, MI, Eaton County, MI, Genesee County, MI, Gladwin County, MI, Grand Traverse County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Jackson County, MI, Kalamazoo County, MI, Kalkaska County, MI, Kent County, MI, Lake County, MI, Lapeer County, MI, Leelanau County, MI, Lenawee County, MI, Livingston County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Menominee County, MI, Midland County, MI, Missaukee County, MI, Monroe County, MI, Montcalm County, MI, Newaygo County, MI, Oakland County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Roscommon County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI, Washtenaw County, MI, Wayne County, MI, Wexford County, MI, Defiance County, OH, Fulton County, OH, Lucas County, OH, Ottawa County, OH, Williams County, OH, Door County, WI, Florence County, WI, Forest County, WI, Kewaunee County, WI, Marinette County, WI, Oconto County, WI

The radar

The Grand Rapids radar (KGRR), 66 km from the middle of the area, began a volume at 10:02 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 00:00Z, 10.0 hours before the alert went out and 202 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 2005-07-24Temperature 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 2005-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 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
1725 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
72 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
Jul 24, 7:30 AM ESTSevere Thunderstorm WatchSPCDeKalb, Steuben4 hr
Jul 24, 3:46 PM ESTMesoscale DiscussionSPCDeKalb, LaGrange, Noble, Steuben119 min
Jul 23, 11:02 PM ESTMesoscale DiscussionSPCAntrim, Baraga, Benzie, Charlevoix, Cheboygan, Clare and 23 more118 min
Jul 23, 11:35 PM ESTSevere Thunderstorm WatchSPCBaraga, Delta, Dickinson, Gogebic, Iron, Marquette and 2 more6 hr
Jul 24, 1:57 AM ESTMesoscale DiscussionSPCAntrim, Benzie, Clare, Delta, Dickinson, Gladwin and 25 more2 hr
Jul 24, 2:40 AM ESTSevere Thunderstorm WatchSPCAlcona, Alpena, Antrim, Arenac, Bay, Benzie and 34 more7 hr
Jul 24, 9:22 AM ESTMesoscale DiscussionSPCArenac, Bay, Genesee, Gladwin, Gratiot, Huron and 15 more53 min
Jul 24, 6:26 PM ESTMesoscale DiscussionSPCCrawford, Grant, Iowa, Lafayette, Richland64 min

Nearby

Mesoscale Discussions in Michigan, 2005Mesoscale Discussions in Wisconsin, 2005Mesoscale Discussions in Ohio, 2005Every mesoscale discussion in 2005

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.