Alert archive / Indiana / Mesoscale Discussions in 2008

Mesoscale Discussion 20

January 7, 200810 counties in Illinois; 35 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Jan 7, 2008, 7:03 PM CST for 10 counties in Illinois; 35 counties in Indiana. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jan 7, 2008, 7:03 PM CST (01:03 UTC)
Expired
Jan 7, 2008, 9:00 PM CST
In force
117 min
Issued by
the Storm Prediction Center
All 45 counties

Champaign County, IL, Clark County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Jasper County, IL, Moultrie County, IL, Vermilion County, IL, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hendricks County, IN, Howard County, IN, Huntington County, IN, Kosciusko County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN

The radar

The Indianapolis radar (KIND), 79 km from the middle of the area, began a volume at 01:04 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 00:00Z, 1.1 hours before the alert went out and 132 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 00:00Z on 2008-01-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 655 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 00:00Z on 2008-01-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 317 square meters per square second.1939587897Sfc1 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
655 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
746 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
317 m²/s²
0-3 km storm-relative helicity
343 m²/s²
Significant tornado parameter
1.3
Supercell composite
4.8

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
Jan 7, 6:11 PM CSTMesoscale DiscussionSPCAdams, Brown, Pike, Schuyler94 min
Jan 7, 6:57 PM CSTMesoscale DiscussionSPCCalhoun, Greene, Jersey, Madison, Monroe, Pike and 2 more93 min
Jan 7, 7:48 PM CSTTornado Watch PDSSPCBond, Calhoun, Clinton, Fayette, Greene, Jackson and 12 more9 hr
Jan 7, 10:04 PM CSTMesoscale DiscussionSPCCalhoun86 min
Jan 7, 10:12 PM CSTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 12 more2 hr
Jan 8, 11:27 AM CSTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more2 hr
Jan 8, 11:40 AM CSTMesoscale DiscussionSPCJo Daviess5 hr
Jan 8, 12:22 PM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 10 more83 min
Jan 8, 1:11 PM CSTMesoscale DiscussionSPCGallatin, Hardin, Massac, Pope2 hr
Jan 8, 1:26 PM CSTTornado WatchSPCGallatin, Hardin, Massac, Pope8 hr
Jan 7, 6:01 PM CSTTornado WatchSPCCass, Elkhart, Fulton, Kosciusko, LaGrange, LaPorte and 7 more5 hr
Jan 7, 8:22 PM CSTTornado WatchSPCAdams, Allen, Blackford, DeKalb, Grant, Huntington and 5 more3 hr
Jan 8, 4:03 PM CSTMesoscale DiscussionSPCHarrison, Perry, Spencer, Warrick117 min

Nearby

Mesoscale Discussions in Indiana, 2008Mesoscale Discussions in Illinois, 2008Every mesoscale discussion in 2008

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.