Alert archive / Indiana / Mesoscale Discussions in 2017

Mesoscale Discussion 851

May 26, 201740 counties in Indiana; 8 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 26, 2017, 10:28 PM EDT for 40 counties in Indiana; 8 counties in Ohio. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: May 26, 2017, 10:28 PM EDT (02:28 UTC)
Expired: May 27, 2017, 12:00 AM EDT
In force: 92 min
Issued by: the Storm Prediction Center

All 48 counties

Adams County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, Whitley County, IN, Butler County, OH, Darke County, OH, Greene County, OH, Hamilton County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Warren County, OH

The radar

The Indianapolis radar (KIND), 31 km from the middle of the area, began a volume at 02:29 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 00:00Z, 2.5 hours before the alert went out and 200 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1715 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 125 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 8:09 PM EDT	Severe Thunderstorm Watch	SPC	Bartholomew, Boone, Carroll, Clinton, Decatur, Delaware and 23 more	3 hr
May 27, 1:50 PM EDT	Mesoscale Discussion	SPC	Clark, Crawford, Dearborn, Floyd, Harrison, Jackson and 9 more	85 min
May 27, 2:16 PM EDT	Mesoscale Discussion	SPC	Dubois, Gibson, Pike, Posey, Spencer, Vanderburgh and 1 more	59 min
May 27, 2:36 PM EDT	Severe Thunderstorm Watch	SPC	Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more	7 hr
May 27, 4:11 PM EDT	Severe Thunderstorm Watch	SPC	Ohio, Switzerland	6 hr
May 27, 4:50 PM EDT	Mesoscale Discussion	SPC	Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 8 more	85 min
May 27, 6:13 PM EDT	Severe Thunderstorm Watch PDS	SPC	Gibson, Pike, Posey, Spencer, Vanderburgh, Warrick	7 hr

Nearby

Mesoscale Discussions in Indiana, 2017 Mesoscale Discussions in Ohio, 2017 Every mesoscale discussion in 2017

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.