Alert archive / Indiana / Mesoscale Discussions in 2017

Mesoscale Discussion 228

February 28, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Feb 28, 2017, 11:03 PM EST for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Feb 28, 2017, 11:03 PM EST (04:03 UTC)
Expired
Mar 1, 2017, 1:00 AM EST
In force
117 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 105 counties

Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, Dearborn County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Johnson County, IN, Kosciusko County, IN, LaGrange County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Morgan County, IN, Noble County, IN, Ohio County, IN, Parke County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Steuben County, IN, Switzerland County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Gallatin County, KY, Kenton County, KY, Pendleton County, KY, Branch County, MI, Hillsdale County, MI, Lenawee County, MI, Allen County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Fayette County, OH, Franklin County, OH, Fulton County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Highland County, OH, Logan County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Preble County, OH, Putnam County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 131 km from the middle of the area, began a volume at 04:06 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, 4.1 hours before the alert went out and 131 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 2017-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 126 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 2017-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 416 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
126 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
490 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
416 m²/s²
0-3 km storm-relative helicity
441 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

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
Feb 28, 7:00 PM ESTMesoscale DiscussionSPCAdams, Allen, Cass, DeKalb, Elkhart, Fulton and 14 more90 min
Feb 28, 7:37 PM ESTSevere Thunderstorm WatchSPCAllen, DeKalb, Elkhart, Fulton, Kosciusko, LaGrange and 8 more8 hr
Feb 28, 8:46 PM ESTMesoscale DiscussionSPCBrown, Crawford, Daviess, Dubois, Gibson, Greene and 14 more119 min
Feb 28, 9:29 PM ESTTornado WatchSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 34 more12 hr
Feb 28, 9:41 PM ESTMesoscale DiscussionSPCAllen, DeKalb, Elkhart, Fulton, Kosciusko, LaGrange and 9 more94 min
Feb 28, 10:51 PM ESTTornado WatchSPCBenton, Jasper, Lake, Newton, Porter6 hr
Feb 28, 11:09 PM ESTMesoscale DiscussionSPCCrawford, Daviess, Dubois, Gibson, Knox, Lawrence and 6 more66 min
Feb 28, 11:29 PM ESTTornado WatchSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 41 more8 hr
Mar 1, 12:52 AM ESTMesoscale DiscussionSPCBenton, Elkhart, Fulton, Jasper, LaPorte, Marshall and 7 more53 min
Mar 1, 1:44 AM ESTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 28 more61 min
Mar 1, 2:32 AM ESTMesoscale DiscussionSPCClark, Crawford, Dearborn, Dubois, Floyd, Harrison and 11 more88 min
Mar 1, 4:03 AM ESTTornado WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick5 hr
Mar 1, 5:19 AM ESTMesoscale DiscussionSPCHarrison, Perry, Posey, Spencer, Vanderburgh, Warrick56 min
Mar 1, 5:57 AM ESTTornado WatchSPCClark, Crawford, Dearborn, Dubois, Floyd, Franklin and 9 more5 hr
Mar 1, 3:09 AM ESTMesoscale DiscussionSPCBallard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 6 more2 hr
Mar 1, 6:28 AM ESTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bell and 88 more2 hr
Mar 1, 6:48 AM ESTSevere Thunderstorm WatchSPCBoyd, Carter, Greenup5 hr
Mar 1, 7:47 AM ESTSevere Thunderstorm WatchSPCBath, Bell, Breathitt, Clay, Elliott, Estill and 28 more5 hr
Mar 1, 8:28 AM ESTMesoscale DiscussionSPCBell, Boyd, Breathitt, Carter, Clay, Clinton and 32 more92 min
Mar 1, 3:56 PM ESTMesoscale DiscussionSPCBoyd, Breathitt, Carter, Elliott, Floyd, Greenup and 8 more2 hr
Mar 1, 2:19 AM ESTMesoscale DiscussionSPCAshland, Ashtabula, Belmont, Carroll, Columbiana, Coshocton and 22 more86 min
Mar 1, 3:24 AM ESTSevere Thunderstorm WatchSPCAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more4 hr

Nearby

Mesoscale Discussions in Indiana, 2017Mesoscale Discussions in Ohio, 2017Mesoscale Discussions in Kentucky, 2017Every mesoscale discussion in 2017

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.