Alert archive / Indiana / Mesoscale Discussions in 2014

Mesoscale Discussion 1707

September 10, 20145 counties in Illinois; 50 counties in Indiana; 10 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Sep 10, 2014, 10:34 AM CDT for 5 counties in Illinois; 50 counties in Indiana; 10 counties in Ohio. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Sep 10, 2014, 10:34 AM CDT (15:34 UTC)
Expired
Sep 10, 2014, 12:30 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 65 counties

Clark County, IL, Coles County, IL, Douglas County, IL, Edgar County, IL, Vermilion County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Johnson County, IN, Kosciusko County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Newton County, IN, Noble County, IN, Owen County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Starke County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allen County, OH, Auglaize County, OH, Darke County, OH, Defiance County, OH, Mercer County, OH, Miami County, OH, Paulding County, OH, Putnam County, OH, Shelby County, OH, Van Wert County, OH

The radar

The Indianapolis radar (KIND), 72 km from the middle of the area, began a volume at 15:33 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 3.6 hours before the alert went out and 244 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 2014-09-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 586 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 2014-09-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 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
586 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
85 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.

IssuedProductOfficeCountiesLasted
Sep 10, 5:02 AM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Hancock, McDonough, Menard and 4 more118 min
Sep 10, 1:48 PM CDTMesoscale DiscussionSPCBond, Calhoun, Champaign, Christian, Clark, Clay and 31 more117 min
Sep 10, 3:24 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Champaign, Christian, Clark, Clay and 37 more6 hr
Sep 10, 4:36 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more84 min
Sep 10, 6:22 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 19 more83 min
Sep 10, 12:54 PM CDTTornado WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 51 more9 hr
Sep 10, 3:08 PM CDTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Brown, Decatur and 24 more2 hr
Sep 10, 5:11 PM CDTMesoscale DiscussionSPCClay, Delaware, Fayette, Hamilton, Hancock, Hendricks and 13 more64 min

Nearby

Mesoscale Discussions in Indiana, 2014Mesoscale Discussions in Ohio, 2014Mesoscale Discussions in Illinois, 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.