Alert archive / Indiana / Mesoscale Discussions in 2008

Mesoscale Discussion 770

May 2, 200819 counties in Illinois; 67 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at May 2, 2008, 9:48 AM CDT for 19 counties in Illinois; 67 counties in Indiana. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: May 2, 2008, 9:48 AM CDT (14:48 UTC)
Expired: May 2, 2008, 11:45 AM CDT
In force: 117 min
Issued by: the Storm Prediction Center

All 86 counties

Champaign County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Ford County, IL, Iroquois County, IL, Jasper County, IL, Lawrence County, IL, Moultrie County, IL, Richland County, IL, Vermilion County, IL, Wabash County, IL, Wayne County, IL, Bartholomew County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Decatur County, IN, Delaware County, IN, Dubois County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Fulton County, IN, Gibson County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jackson County, IN, Jasper County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Kosciusko County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Newton County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Pike County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Washington County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN

The radar

The Indianapolis radar (KIND), 66 km from the middle of the area, began a volume at 14:51 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

Lincoln, IL (KILX), launched 12:00Z, 2.8 hours before the alert went out and 146 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 729 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 730 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.4

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.

Issued	Product	Office	Counties	Lasted
May 2, 5:00 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Calhoun, Greene, Jersey, Pike	5 hr
May 2, 10:44 AM CDT	Tornado Watch	SPC	Alexander, Edwards, Gallatin, Hamilton, Hardin, Johnson and 7 more	9 hr
May 2, 11:05 AM CDT	Mesoscale Discussion	SPC	Jo Daviess	115 min
May 2, 12:12 PM CDT	Mesoscale Discussion	SPC	Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 2 more	2 hr
May 2, 3:05 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Champaign, DeKalb, DeWitt and 30 more	115 min

Nearby

Mesoscale Discussions in Indiana, 2008 Mesoscale Discussions in Illinois, 2008 Every 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.