Alert archive / Ohio / Mesoscale Discussions in 2011

Mesoscale Discussion 164

February 28, 20118 counties in Indiana; 10 counties in Kentucky; 37 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Feb 28, 2011, 1:28 AM EST for 8 counties in Indiana; 10 counties in Kentucky; 37 counties in Ohio. It was in force for 32 min.

The area

The outline as issued.

The facts

Issued
Feb 28, 2011, 1:28 AM EST (06:28 UTC)
Expired
Feb 28, 2011, 2:00 AM EST
In force
32 min
Issued by
the Storm Prediction Center
All 55 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hardin County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Union County, OH, Vinton County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 25 km from the middle of the area, began a volume at 06:28 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 00:00Z, 6.5 hours before the alert went out and 24 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 2011-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 2011-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 325 square meters per square second.1939587897117Sfc1 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
539 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
325 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Feb 27, 9:25 PM ESTMesoscale DiscussionSPCBoone, Brown, Clay, Clinton, Daviess, Dubois and 25 more65 min
Feb 28, 12:46 AM ESTTornado WatchSPCBartholomew, Boone, Brown, Clay, Daviess, Decatur and 29 more5 hr
Feb 28, 1:40 AM ESTTornado WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more6 hr
Feb 28, 2:05 AM ESTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Perry, Spencer and 3 more25 min
Feb 28, 2:33 AM ESTTornado WatchSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more7 hr
Feb 28, 3:32 AM ESTMesoscale DiscussionSPCBartholomew, Brown, Dearborn, Decatur, Fayette, Franklin and 14 more58 min
Feb 28, 4:25 AM ESTMesoscale DiscussionSPCClark, Floyd, Harrison, Perry65 min
Feb 28, 5:31 AM ESTMesoscale DiscussionSPCBath, Boyd, Breathitt, Carter, Clay, Elliott and 31 more29 min
Feb 28, 5:47 AM ESTTornado WatchSPCBath, Bell, Boyd, Breathitt, Carter, Clay and 31 more5 hr

Nearby

Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Indiana, 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.