Alert archive / Kentucky / Mesoscale Discussions in 2008

Mesoscale Discussion 1849

July 22, 200817 counties in Indiana; 36 counties in Kentucky; 15 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2008, 2:21 AM EDT for 17 counties in Indiana; 36 counties in Kentucky; 15 counties in Ohio. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Jul 22, 2008, 2:21 AM EDT (06:21 UTC)
Expired
Jul 22, 2008, 3:15 AM EDT
In force
54 min
Issued by
the Storm Prediction Center
All 68 counties

Clark County, IN, Crawford County, IN, Dearborn County, IN, Dubois County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Harrison County, IN, Jefferson County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Anderson County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Bracken County, KY, Bullitt County, KY, Campbell County, KY, Carroll County, KY, Clark County, KY, Elliott County, KY, Fayette County, KY, Fleming 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, Meade County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Clermont County, OH, Clinton County, OH, Fayette County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Montgomery County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Warren County, OH

The radar

The Louisville radar (KLVX), 124 km from the middle of the area, began a volume at 06:24 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 00:00Z, 6.4 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 2008-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2315 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 2008-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 square meters per square second.193958Sfc1 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
2315 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1217 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
262 m²/s²
Significant tornado parameter
2.3
Supercell composite
18.4

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
Jul 21, 8:20 PM EDTSevere Thunderstorm WatchSPCBartholomew, Benton, Boone, Brown, Carroll, Clay and 34 more7 hr
Jul 21, 10:14 PM EDTSevere Thunderstorm WatchSPCGibson, Pike, Posey, Spencer, Vanderburgh, Warrick6 hr
Jul 21, 11:38 PM EDTMesoscale DiscussionSPCBartholomew, Brown, Clark, Clay, Crawford, Daviess and 43 more97 min
Jul 22, 12:06 AM EDTSevere Thunderstorm WatchSPCClark, Crawford, Dearborn, Dubois, Fayette, Floyd and 12 more6 hr
Jul 22, 3:27 AM EDTSevere Thunderstorm WatchSPCBoyd, Carter, Greenup, Lawrence4 hr
Jul 22, 5:47 AM EDTMesoscale DiscussionSPCBallard, Butler, Caldwell, Calloway, Carlisle, Christian and 15 more88 min
Jul 22, 12:55 PM EDTMesoscale DiscussionSPCAdair, Allen, Barren, Boyle, Casey, Clinton and 21 more3 hr
Jul 22, 3:02 PM EDTMesoscale DiscussionSPCBreathitt, Clay, Elliott, Estill, Floyd, Harlan and 20 more88 min
Jul 22, 3:20 PM EDTSevere Thunderstorm WatchSPCBell, Breathitt, Clay, Estill, Floyd, Harlan and 18 more8 hr

Nearby

Mesoscale Discussions in Kentucky, 2008Mesoscale Discussions in Indiana, 2008Mesoscale Discussions in Ohio, 2008Every mesoscale discussion in 2008

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.