Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 1583

August 19, 201428 counties in Indiana; 8 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Aug 19, 2014, 6:24 PM EDT for 28 counties in Indiana; 8 counties in Ohio. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
Aug 19, 2014, 6:24 PM EDT (22:24 UTC)
Expired
Aug 19, 2014, 8:00 PM EDT
In force
96 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 36 counties

Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Jay County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Union County, IN, Wayne County, IN, Auglaize County, OH, Butler County, OH, Darke County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Shelby County, OH

The radar

The Indianapolis radar (KIND), 61 km from the middle of the area, began a volume at 22:26 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, 10.4 hours before the alert went out and 163 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, Cncnati-Daytn, OH at 12:00Z on 2014-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 874 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, Cncnati-Daytn, OH at 12:00Z on 2014-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
874 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
763 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
56 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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
Aug 19, 2:03 PM EDTMesoscale DiscussionSPCAdams, Allen, Benton, Boone, Carroll, Cass and 31 more57 min
Aug 19, 2:34 PM EDTSevere Thunderstorm WatchSPCDeKalb, Elkhart, Fulton, Kosciusko, LaGrange, Marshall and 4 more5 hr
Aug 19, 3:20 PM EDTMesoscale DiscussionSPCCrawford, Daviess, Dubois, Gibson, Greene, Knox and 13 more115 min
Aug 19, 4:51 PM EDTMesoscale DiscussionSPCAllen, DeKalb, LaGrange, Noble, Steuben, Whitley84 min

Nearby

Mesoscale Discussions in Indiana, 2014Mesoscale Discussions in Ohio, 2014Every mesoscale discussion in 2014

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.