Alert archive / Indiana / Mesoscale Discussions in 2007

Mesoscale Discussion 1528

July 18, 20075 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2007, 6:38 PM CDT for 5 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 18, 2007, 6:38 PM CDT (23:38 UTC)
Expired
Jul 18, 2007, 8:15 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 97 counties

Champaign County, IL, Cook County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, Livingston County, IL, McHenry County, IL, Piatt County, IL, Vermilion County, IL, Will County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fayette County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Johnson County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Saint Joseph County, IN, Shelby County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Hillsdale County, MI, Jackson County, MI, Kalamazoo County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Van Buren County, MI, Allen County, OH, Auglaize County, OH, Darke 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, Kenosha County, WI

The radar

The Northern Indiana radar (KIWX), 72 km from the middle of the area, began a volume at 23:41 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.6 hours before the alert went out and 224 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, Lincoln, IL at 12:00Z on 2007-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1015 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, Lincoln, IL at 12:00Z on 2007-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 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
1015 J/kg
Mixed-layer CIN
-112 J/kg
Mixed-layer LCL
1147 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
205 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

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 17, 9:31 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, DeKalb, Jo Daviess, Lee, Ogle and 3 more6 hr
Jul 17, 11:24 PM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Henderson, Henry, Jo Daviess and 15 more96 min
Jul 18, 3:35 AM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, Jo Daviess, Kane, Lee and 5 more85 min
Jul 18, 4:21 AM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Douglas and 10 more54 min
Jul 18, 4:59 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Champaign, Cook, DeKalb and 32 more91 min
Jul 18, 5:35 PM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, DeKalb, DeWitt, Fulton and 25 more6 hr
Jul 18, 6:50 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, Henderson, Henry and 18 more85 min
Jul 18, 12:17 PM CDTMesoscale DiscussionSPCMenominee118 min
Jul 18, 3:03 PM CDTMesoscale DiscussionSPCArenac, Bay, Clare, Clinton, Genesee, Gladwin and 25 more117 min
Jul 18, 3:39 PM CDTSevere Thunderstorm WatchSPCArenac, Bay, Clare, Clinton, Genesee, Gladwin and 24 more5 hr
Jul 18, 5:46 PM CDTMesoscale DiscussionSPCAlcona, Alpena, Arenac, Barry, Bay, Clare and 42 more119 min
Jul 18, 1:37 PM CDTSevere Thunderstorm WatchSPCBrown, Calumet, Dodge, Door, Fond du Lac, Green Lake and 18 more7 hr
Jul 18, 3:42 PM CDTMesoscale DiscussionSPCBuffalo, Chippewa, Clark, Dunn, Eau Claire, Jackson and 6 more63 min
Jul 18, 3:59 PM CDTSevere Thunderstorm WatchSPCAdams, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 10 more5 hr
Jul 18, 6:44 PM CDTMesoscale DiscussionSPCAdams, Jackson, Juneau, La Crosse, Monroe, Trempealeau and 1 more2 hr

Nearby

Mesoscale Discussions in Indiana, 2007Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Michigan, 2007Every mesoscale discussion in 2007

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.