Alert archive / Kentucky / Mesoscale Discussions in 2003

Mesoscale Discussion 1935

July 21, 200337 counties in Kentucky; 24 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2003, 7:03 AM CDT for 37 counties in Kentucky; 24 counties in Tennessee. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jul 21, 2003, 7:03 AM CDT (12:03 UTC)
Expired
Jul 21, 2003, 9:00 AM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 61 counties

Allen County, KY, Anderson County, KY, Barren County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Christian County, KY, Daviess County, KY, Edmonson County, KY, Graves County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Hopkins County, KY, Larue County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McLean County, KY, Meade County, KY, Metcalfe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Washington County, KY, Webster County, KY, Benton County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, Dickson County, TN, Dyer County, TN, Gibson County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Lauderdale County, TN, Madison County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Stewart County, TN, Sumner County, TN, Weakley County, TN

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 0.1 hours before the alert went out and 107 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 12:00Z on 2003-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1467 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, Nashville Metro, TN at 12:00Z on 2003-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 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
1467 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
1108 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
117 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
Jul 21, 5:03 AM CDTMesoscale DiscussionSPCBoone, Campbell, Carroll, Gallatin, Grant, Henry and 5 more117 min
Jul 21, 5:10 AM CDTSevere Thunderstorm WatchSPCBoone, Bracken, Campbell, Carroll, Gallatin, Grant and 2 more6 hr
Jul 21, 6:39 AM CDTMesoscale DiscussionSPCBoyd, Bracken, Carter, Fleming, Greenup, Harrison and 5 more96 min
Jul 21, 7:40 AM CDTSevere Thunderstorm WatchSPCBath, Boyd, Carter, Elliott, Greenup, Lawrence and 3 more5 hr
Jul 21, 10:27 AM CDTMesoscale DiscussionSPCBoone, Breckinridge, Bullitt, Butler, Caldwell, Carroll and 33 more2 hr
Jul 21, 11:55 AM CDTSevere Thunderstorm WatchSPCAdair, Allen, Barren, Boyle, Butler, Caldwell and 34 more6 hr
Jul 21, 1:41 PM CDTMesoscale DiscussionSPCBell, Floyd, Harlan, Knott, Leslie, Letcher and 3 more64 min
Jul 21, 3:14 PM CDTMesoscale DiscussionSPCAllen, Christian, Cumberland, Logan, Monroe, Muhlenberg and 3 more2 hr
Jul 21, 3:50 PM CDTSevere Thunderstorm WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 21 more4 hr

Nearby

Mesoscale Discussions in Kentucky, 2003Mesoscale Discussions in Tennessee, 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.