Alert archive / Ohio / Mesoscale Discussions in 2018

Mesoscale Discussion 208

April 3, 201815 counties in Indiana; 23 counties in Kentucky; 33 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2018, 4:18 PM EDT for 15 counties in Indiana; 23 counties in Kentucky; 33 counties in Ohio. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Apr 3, 2018, 4:18 PM EDT (20:18 UTC)
Expired
Apr 3, 2018, 6:15 PM EDT
In force
117 min
Issued by
the Storm Prediction Center
All 71 counties

Clark County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Harrison County, IN, Jefferson County, IN, Jennings County, IN, Ohio County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Boone County, KY, Bracken County, KY, Bullitt County, KY, Campbell County, KY, Carroll County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble 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, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Union County, OH, Warren County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 51 km from the middle of the area, began a volume at 20:19 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, 8.3 hours before the alert went out and 53 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 2018-04-03Temperature 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 2018-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 358 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
542 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
358 m²/s²
0-3 km storm-relative helicity
356 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 2, 11:46 PM EDTMesoscale DiscussionSPCGibson, Pike, Posey119 min
Apr 3, 12:41 PM EDTMesoscale DiscussionSPCBartholomew, Blackford, Brown, Clark, Clay, Crawford and 46 more3 hr
Apr 3, 1:16 PM EDTTornado WatchSPCBartholomew, Boone, Brown, Clark, Clay, Crawford and 48 more6 hr
Apr 3, 1:57 PM EDTMesoscale DiscussionSPCPosey2 hr
Apr 3, 2:33 PM EDTTornado WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick7 hr
Apr 3, 4:34 PM EDTMesoscale DiscussionSPCPosey86 min
Apr 3, 7:30 PM EDTTornado WatchSPCBartholomew, Boone, Brown, Clark, Clay, Crawford and 41 more5 hr
Apr 3, 6:38 PM EDTMesoscale DiscussionSPCBath, Bourbon, Boyd, Carter, Clark, Elliott and 12 more2 hr
Apr 3, 7:07 PM EDTSevere Thunderstorm WatchSPCBoyd, Carter, Greenup, Lawrence6 hr

Nearby

Mesoscale Discussions in Ohio, 2018Mesoscale Discussions in Kentucky, 2018Mesoscale Discussions in Indiana, 2018Every mesoscale discussion in 2018

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.