Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 345

April 4, 20117 counties in Indiana; Boone County, Campbell County, Kenton County, Kentucky; 19 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Apr 4, 2011, 12:50 PM EDT for 7 counties in Indiana; Boone County, Campbell County, Kenton County, Kentucky; 19 counties in Ohio. It was in force for 25 min.

The area

The outline as issued.

The facts

Issued
Apr 4, 2011, 12:50 PM EDT (16:50 UTC)
Expired
Apr 4, 2011, 1:15 PM EDT
In force
25 min
Issued by
the Storm Prediction Center
All 29 counties

Dearborn County, IN, Decatur County, IN, Franklin County, IN, Jennings County, IN, Ohio County, IN, Ripley County, IN, Union County, IN, Boone County, KY, Campbell County, KY, Kenton County, KY, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Delaware County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Madison County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Preble County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 39 km from the middle of the area, began a volume at 16:54 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, 4.8 hours before the alert went out and 40 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 2011-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 2011-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 324 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
6 J/kg
Mixed-layer CIN
-333 J/kg
Mixed-layer LCL
1160 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
324 m²/s²
0-3 km storm-relative helicity
410 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
Apr 3, 9:54 PM EDTSevere Thunderstorm WatchSPCLake, Porter5 hr
Apr 4, 5:20 AM EDTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 48 more25 min
Apr 4, 5:30 AM EDTSevere Thunderstorm WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 39 more8 hr
Apr 4, 7:53 AM EDTMesoscale DiscussionSPCBartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 39 more2 hr
Apr 4, 8:22 AM EDTTornado WatchSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 10 more7 hr
Apr 4, 12:34 PM EDTTornado WatchSPCClark, Crawford, Floyd, Harrison, Jefferson, Orange and 3 more5 hr
Apr 4, 2:25 PM EDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 74 more65 min
Apr 4, 3:05 PM EDTSevere Thunderstorm WatchSPCBath, Bell, Boyd, Breathitt, Carter, Clay and 33 more6 hr
Apr 4, 3:08 PM EDTMesoscale DiscussionSPCAllen, Clinton, Cumberland, McCreary, Monroe, Russell and 2 more67 min
Apr 4, 4:49 PM EDTMesoscale DiscussionSPCBell, Boyd, Breathitt, Carter, Clay, Elliott and 21 more56 min
Apr 4, 6:00 PM EDTMesoscale DiscussionSPCBell, Boyd, Breathitt, Clay, Floyd, Harlan and 12 more90 min
Apr 4, 4:12 PM EDTMesoscale DiscussionSPCAthens, Belmont, Carroll, Columbiana, Coshocton, Guernsey and 12 more63 min

Nearby

Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Kentucky, 2011Every mesoscale discussion in 2011

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.