Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 250

April 9, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2015, 4:01 PM EDT for 4 states. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2015, 4:01 PM EDT (20:01 UTC)
Expired
Apr 9, 2015, 5:00 PM EDT
In force
59 min
Issued by
the Storm Prediction Center
All 79 counties

Dearborn County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Jessamine County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Madison County, KY, Mason County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Woodford County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Clermont County, OH, Clinton County, OH, Gallia County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Noble County, OH, Perry County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Marshall County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wayne County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Cincinnati radar (KILN), 73 km from the middle of the area, began a volume at 20:01 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 12:00Z, 8.0 hours before the alert went out and 72 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 2015-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 175 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 2015-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 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
175 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
1204 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
111 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 9, 1:51 PM EDTMesoscale DiscussionSPCDearborn54 min
Apr 9, 2:26 PM EDTSevere Thunderstorm WatchSPCDearborn, Ohio, Ripley, Switzerland8 hr
Apr 9, 2:48 PM EDTTornado WatchSPCBenton, Jasper, Lake, Newton, Porter9 hr
Apr 9, 4:12 PM EDTMesoscale DiscussionSPCLake, Newton93 min
Apr 9, 4:49 PM EDTMesoscale DiscussionSPCClark, Dearborn, Floyd, Franklin, Jefferson, Jennings and 5 more56 min
Apr 9, 7:48 PM EDTTornado WatchSPCBartholomew, Boone, Brown, Carroll, Clay, Clinton and 31 more6 hr
Apr 9, 4:45 PM EDTMesoscale DiscussionSPCBallard60 min
Apr 9, 7:11 PM EDTMesoscale DiscussionSPCFulton64 min
Apr 9, 4:29 PM EDTSevere Thunderstorm WatchSPCBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more6 hr
Apr 9, 5:36 PM EDTMesoscale DiscussionSPCAshland, Crawford, Erie, Hancock, Holmes, Huron and 14 more114 min

Nearby

Mesoscale Discussions in Kentucky, 2015Mesoscale Discussions in Ohio, 2015Mesoscale Discussions in West Virginia, 2015Every mesoscale discussion in 2015

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.