Alert archive / Indiana / Mesoscale Discussions in 2007

Mesoscale Discussion 1848

August 22, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Aug 22, 2007, 3:04 PM EDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 22, 2007, 3:04 PM EDT (19:04 UTC)
Expired: Aug 22, 2007, 5:30 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 92 counties

Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Dearborn County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fayette County, IN, Franklin County, IN, Fulton 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, Jay County, IN, Jennings County, IN, Johnson County, IN, Kosciusko County, IN, LaGrange County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Ohio County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Steuben County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vigo County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, Whitley County, IN, Boone County, KY, Campbell County, KY, Kenton County, KY, Branch County, MI, Hillsdale County, MI, Lenawee County, MI, Saint Joseph County, MI, Allen County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clermont County, OH, Darke County, OH, Defiance County, OH, Fulton County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Lucas County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Shelby County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH

The radar

The Indianapolis radar (KIND), 98 km from the middle of the area, began a volume at 19:09 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.1 hours before the alert went out and 158 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: 1637 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1057 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -21 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.

Issued	Product	Office	Counties	Lasted
Aug 22, 5:53 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Carroll, Cass, DeKalb and 24 more	67 min
Aug 22, 7:51 PM EDT	Mesoscale Discussion	SPC	Allegan, Barry, Bay, Calhoun, Clinton, Eaton and 19 more	114 min

Nearby

Mesoscale Discussions in Indiana, 2007 Mesoscale Discussions in Ohio, 2007 Mesoscale Discussions in Michigan, 2007 Every 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.