Alert archive / Michigan / Mesoscale Discussions in 2010

Mesoscale Discussion 1439

July 23, 2010LaGrange County, Saint Joseph County, Steuben County, Indiana; 5 counties in Michigan; Fulton County, Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2010, 7:47 PM EDT for LaGrange County, Saint Joseph County, Steuben County, Indiana; 5 counties in Michigan; Fulton County, Ohio. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued
Jul 23, 2010, 7:47 PM EDT (23:47 UTC)
Expired
Jul 23, 2010, 9:45 PM EDT
In force
118 min
Issued by
the Storm Prediction Center

Counties LaGrange County, IN, Saint Joseph County, IN, Steuben County, IN, Branch County, MI, Cass County, MI, Hillsdale County, MI, Lenawee County, MI, Saint Joseph County, MI, Fulton County, OH

The radar

The Northern Indiana radar (KIWX), 70 km from the middle of the area, began a volume at 23:49 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 12:00Z, 11.8 hours before the alert went out and 171 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 2010-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2736 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 2010-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 202 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
2736 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
470 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
202 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
1.5
Supercell composite
8.7

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 23, 12:00 AM EDTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Fulton, Kosciusko, LaGrange and 9 more90 min
Jul 23, 12:35 AM EDTTornado WatchSPCDeKalb, LaGrange, Steuben3 hr
Jul 23, 3:30 PM EDTMesoscale DiscussionSPCLake, LaPorte, Porter90 min
Jul 23, 4:01 PM EDTSevere Thunderstorm WatchSPCBenton, Jasper, Lake, Newton, Porter5 hr
Jul 23, 5:23 PM EDTSevere Thunderstorm WatchSPCAllen, DeKalb, Elkhart, Fulton, Kosciusko, LaGrange and 8 more7 hr
Jul 23, 4:58 PM EDTMesoscale DiscussionSPCAllegan, Barry, Branch, Calhoun, Cass, Eaton and 13 more92 min
Jul 23, 12:14 PM EDTMesoscale DiscussionSPCAshtabula, Cuyahoga, Geauga, Lake, Lorain, Mahoning and 4 more91 min
Jul 23, 12:46 PM EDTSevere Thunderstorm WatchSPCAshtabula, Geauga, Lake, Mahoning, Portage, Trumbull7 hr
Jul 23, 7:00 PM EDTMesoscale DiscussionSPCAshtabula, Columbiana, Cuyahoga, Geauga, Lake, Lorain and 6 more60 min
Jul 23, 7:19 PM EDTSevere Thunderstorm WatchSPCAshland, Ashtabula, Columbiana, Crawford, Cuyahoga, Erie and 23 more6 hr

Nearby

Mesoscale Discussions in Michigan, 2010Mesoscale Discussions in Indiana, 2010Mesoscale Discussions in Ohio, 2010Every mesoscale discussion in 2010

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.