Alert archive / Kentucky / Mesoscale Discussions in 2003

Mesoscale Discussion 877

May 9, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 2:02 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 2:02 PM CDT (19:02 UTC)
Expired
May 9, 2003, 4:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 82 counties

Edwards County, IL, Lawrence County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Clark County, IN, Crawford County, IN, Daviess County, IN, Dearborn County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Ripley County, IN, Scott County, IN, Spencer County, IN, Switzerland County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Anderson County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Bullitt 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, Henry County, KY, Jefferson County, KY, Johnson County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Magoffin County, KY, Mason 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, Clermont County, OH, Clinton County, OH, Hamilton County, OH, Highland County, OH, Lawrence County, OH, Pike County, OH, Scioto County, OH, Warren County, OH

The radar

The Louisville radar (KLVX), 54 km from the middle of the area, began a volume at 19:01 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, 7.0 hours before the alert went out and 200 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 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1208 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 2003-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 452 square meters per square second.1939587897Sfc1 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
1208 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
550 m above ground
0-6 km bulk shear
81 kt
0-1 km storm-relative helicity
452 m²/s²
0-3 km storm-relative helicity
486 m²/s²
Significant tornado parameter
3.9
Supercell composite
19.8

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
May 8, 7:06 PM CDTMesoscale DiscussionSPCHamilton, White54 min
May 8, 7:55 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson, Pike, Scott5 hr
May 8, 9:10 PM CDTSevere Thunderstorm WatchSPCBureau, Carroll, Cass, Champaign, DeKalb, DeWitt and 32 more6 hr
May 8, 9:27 PM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Carroll, Cass, Champaign and 40 more93 min
May 8, 11:50 PM CDTMesoscale DiscussionSPCAdams, Brown, Hancock, Henderson, Pike, Scott55 min
May 9, 12:05 AM CDTSevere Thunderstorm WatchSPCBond, Brown, Calhoun, Cass, Champaign, Christian and 28 more6 hr
May 9, 2:48 PM CDTMesoscale DiscussionSPCClinton, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more117 min
May 9, 4:17 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 21 more28 min
May 9, 4:45 PM CDTTornado WatchSPCCalhoun, Greene, Morgan, Pike, Scott6 hr
May 9, 5:44 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 15 more31 min
May 9, 6:05 PM CDTTornado WatchSPCBond, Champaign, Christian, Clark, Clinton, Coles and 13 more5 hr
May 9, 1:21 AM CDTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 51 more84 min
May 9, 1:45 AM CDTSevere Thunderstorm WatchSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 34 more5 hr
May 9, 5:04 AM CDTMesoscale DiscussionSPCAdams, Allen, Blackford, Boone, Carroll, Cass and 34 more86 min
May 9, 2:40 PM CDTSevere Thunderstorm WatchSPCBartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 22 more5 hr
May 9, 5:00 PM CDTSevere Thunderstorm WatchSPCBoyd, Johnson, Lawrence, Martin5 hr
May 9, 5:26 PM CDTMesoscale DiscussionSPCAnderson, Bath, Bourbon, Boyle, Breathitt, Bullitt and 41 more64 min
May 9, 6:35 PM CDTSevere Thunderstorm WatchSPCBell, Boyle, Breathitt, Casey, Clay, Clinton and 24 more5 hr
May 9, 4:36 PM CDTMesoscale DiscussionSPCAthens, Delaware, Fairfield, Franklin, Hocking, Licking and 9 more114 min

Nearby

Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Indiana, 2003Mesoscale Discussions in Ohio, 2003Every mesoscale discussion in 2003

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.