Alert archive / Indiana / Mesoscale Discussions in 2013

Mesoscale Discussion 659

May 16, 201311 counties in Indiana; 6 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at May 16, 2013, 3:20 PM EDT for 11 counties in Indiana; 6 counties in Ohio. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 16, 2013, 3:20 PM EDT (19:20 UTC)
Expired
May 16, 2013, 4:45 PM EDT
In force
85 min
Issued by
the Storm Prediction Center
Chance of a watch
5%

Counties Boone County, IN, Fayette County, IN, Franklin County, IN, Hamilton County, IN, Hancock County, IN, Henry County, IN, Marion County, IN, Rush County, IN, Shelby County, IN, Union County, IN, Wayne County, IN, Butler County, OH, Clinton County, OH, Greene County, OH, Montgomery County, OH, Preble County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 101 km from the middle of the area, began a volume at 19:23 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, 7.3 hours before the alert went out and 103 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 2013-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 471 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 2013-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
471 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
837 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
65 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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Nearby

Mesoscale Discussions in Indiana, 2013Mesoscale Discussions in Ohio, 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.