Alert archive / Indiana / Mesoscale Discussions in 2016

Mesoscale Discussion 483

April 28, 201612 counties in Indiana; 8 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2016, 3:53 PM EDT for 12 counties in Indiana; 8 counties in Ohio. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Apr 28, 2016, 3:53 PM EDT (19:53 UTC)
Expired
Apr 28, 2016, 5:30 PM EDT
In force
97 min
Issued by
the Storm Prediction Center
Chance of a watch
40%

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

The radar

The Indianapolis radar (KIND), 101 km from the middle of the area, began a volume at 19:52 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, 7.9 hours before the alert went out and 115 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 2016-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 153 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
153 m²/s²
0-3 km storm-relative helicity
199 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.

IssuedProductOfficeCountiesLasted
Apr 27, 8:24 PM EDTSevere Thunderstorm WatchSPCClark, Crawford, Floyd, Harrison, Jefferson, Orange and 2 more2 hr
Apr 28, 3:56 PM EDTMesoscale DiscussionSPCAthens, Gallia, Jackson, Lawrence, Meigs, Scioto and 2 more64 min

Nearby

Mesoscale Discussions in Indiana, 2016Mesoscale Discussions in Ohio, 2016Every mesoscale discussion in 2016

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.