Alert archive / Kentucky / Mesoscale Discussions in 2003

Mesoscale Discussion 884

May 9, 200347 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 6:26 PM EDT for 47 counties in Kentucky. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: May 9, 2003, 6:26 PM EDT (22:26 UTC)
Expired: May 9, 2003, 7:30 PM EDT
In force: 64 min
Issued by: the Storm Prediction Center

All 47 counties

Anderson County, KY, Bath County, KY, Bourbon County, KY, Boyle County, KY, Breathitt County, KY, Bullitt County, KY, Clark County, KY, Clay County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Floyd County, KY, Franklin County, KY, Garrard County, KY, Harrison County, KY, Henry County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Johnson County, KY, Knott County, KY, Laurel County, KY, Lee County, KY, Leslie County, KY, Lincoln County, KY, Madison County, KY, Magoffin County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Morgan County, KY, Nelson County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Owsley County, KY, Perry County, KY, Powell County, KY, Pulaski County, KY, Rockcastle County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Washington County, KY, Wolfe County, KY, Woodford County, KY

The radar

The Jackson,KY radar (KJKL), 92 km from the middle of the area, began a volume at 22:29 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.

Severe Thunderstorm Watch 326May 9, 7:35 PM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.4 hours before the alert went out and 183 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

Issued	Product	Office	Counties	Lasted
May 8, 8:06 PM EDT	Mesoscale Discussion	SPC	Adair, Barren, Breckinridge, Bullitt, Butler, Cumberland and 26 more	54 min
May 9, 2:21 AM EDT	Mesoscale Discussion	SPC	Boone	84 min
May 9, 3:02 PM EDT	Mesoscale Discussion	SPC	Anderson, Bath, Boone, Bourbon, Boyd, Bracken and 35 more	2 hr
May 9, 3:40 PM EDT	Severe Thunderstorm Watch	SPC	Anderson, Bath, Boone, Bourbon, Bracken, Breckinridge and 41 more	5 hr
May 9, 3:48 PM EDT	Mesoscale Discussion	SPC	Union	117 min
May 9, 6:00 PM EDT	Severe Thunderstorm Watch	SPC	Boyd, Johnson, Lawrence, Martin	5 hr
May 9, 7:35 PM EDT	Severe Thunderstorm Watch	SPC	Bell, Boyle, Breathitt, Casey, Clay, Clinton and 24 more	5 hr

Nearby

Mesoscale Discussions in Kentucky, 2003 Every 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.