Alert archive / Indiana / Mesoscale Discussions in 2013

Mesoscale Discussion 22

January 12, 201333 counties in Indiana; 7 counties in Kentucky; 12 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jan 12, 2013, 11:47 PM EST for 33 counties in Indiana; 7 counties in Kentucky; 12 counties in Ohio. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued
Jan 12, 2013, 11:47 PM EST (04:47 UTC)
Expired
Jan 13, 2013, 1:15 AM EST
In force
88 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 52 counties

Bartholomew County, IN, Brown County, IN, Clark County, IN, Crawford County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Dubois County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Greene County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Ohio County, IN, Orange County, IN, Pike County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Switzerland County, IN, Union County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Wayne County, IN, Boone County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Henderson County, KY, Kenton County, KY, Trimble County, KY, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton 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), 86 km from the middle of the area, began a volume at 04:47 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, 4.8 hours before the alert went out and 166 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 00:00Z on 2013-01-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 138 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 00:00Z on 2013-01-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 147 square meters per square second.1939587897Sfc1 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
138 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
468 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
147 m²/s²
0-3 km storm-relative helicity
180 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Jan 12, 7:17 PM ESTMesoscale DiscussionSPCLake, Newton, Porter6 hr
Jan 12, 10:13 PM ESTMesoscale DiscussionSPCSaint Joseph6 hr
Jan 13, 1:09 PM ESTMesoscale DiscussionSPCClay, Parke, Sullivan, Vigo4 hr
Jan 13, 5:27 PM ESTMesoscale DiscussionSPCCarroll, Cass, Elkhart, Fulton, Kosciusko, LaGrange and 2 more4 hr
Jan 12, 10:25 PM ESTMesoscale DiscussionSPCFulton2 hr
Jan 13, 3:46 PM ESTMesoscale DiscussionSPCAdair, Allen, Barren, Cumberland, Metcalfe, Monroe and 2 more119 min

Nearby

Mesoscale Discussions in Indiana, 2013Mesoscale Discussions in Ohio, 2013Mesoscale Discussions in Kentucky, 2013Every mesoscale discussion in 2013

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.