Alert archive / Kentucky / Mesoscale Discussions in 2004

Mesoscale Discussion 524

April 30, 20047 counties in Indiana; 9 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2004, 7:59 PM EST for 7 counties in Indiana; 9 counties in Kentucky. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued
Apr 30, 2004, 7:59 PM EST (00:59 UTC)
Expired
Apr 30, 2004, 9:00 PM EST
In force
61 min
Issued by
the Storm Prediction Center

Counties Crawford County, IN, Floyd County, IN, Harrison County, IN, Jackson County, IN, Lawrence County, IN, Orange County, IN, Washington County, IN, Barren County, KY, Breckinridge County, KY, Butler County, KY, Edmonson County, KY, Grayson County, KY, Hardin County, KY, Hart County, KY, Meade County, KY, Warren County, KY

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 1.0 hours before the alert went out and 177 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, Nashville Metro, TN at 00:00Z on 2004-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 708 joules per kilogram.LCLEL10008507005003002001001 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, Nashville Metro, TN at 00:00Z on 2004-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 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
708 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
807 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 1, 12:59 AM ESTMesoscale DiscussionSPCCrawford, Daviess, Dubois, Gibson, Knox, Martin and 8 more91 min
May 1, 12:36 PM ESTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Gibson, Harrison and 13 more114 min
May 1, 1:48 PM ESTMesoscale DiscussionSPCGreenup117 min

Nearby

Mesoscale Discussions in Kentucky, 2004Mesoscale Discussions in Indiana, 2004Every mesoscale discussion in 2004

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.