Alert archive / Kentucky / Mesoscale Discussions in 2004

Mesoscale Discussion 472

April 24, 20045 states

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2004, 5:08 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 24, 2004, 5:08 PM CDT (22:08 UTC)
Expired: Apr 24, 2004, 7:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 64 counties

Clay County, AR, Craighead County, AR, Greene County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Poinsett County, AR, Randolph County, AR, Alexander County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Union County, IL, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Trigg County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dunklin County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Reynolds County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Benton County, TN, Carroll County, TN, Crockett County, TN, Dyer County, TN, Gibson County, TN, Henry County, TN, Houston County, TN, Lake County, TN, Lauderdale County, TN, Montgomery County, TN, Obion County, TN, Stewart County, TN, Weakley County, TN

The radar

The Paducah radar (KPAH), 61 km from the middle of the area, began a volume at 22:11 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.

Tornado Watch 120Apr 24, 6:40 PM CDT

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 10.1 hours before the alert went out and 212 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: 535 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

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.

Issued	Product	Office	Counties	Lasted
Apr 23, 7:05 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Logan, Madison and 3 more	25 min
Apr 23, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Scott and 2 more	6 hr
Apr 23, 9:43 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Madison, Scott and 2 more	62 min
Apr 23, 11:33 PM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Madison, Scott and 2 more	57 min
Apr 24, 1:40 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Clark, Cleburne, Cleveland, Conway, Crawford and 31 more	4 hr
Apr 24, 4:16 AM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Cleveland, Conway, Dallas, Desha and 24 more	59 min
Apr 24, 11:50 AM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 36 more	55 min
Apr 24, 12:10 PM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Clay, Cleburne and 35 more	8 hr
Apr 24, 12:35 PM CDT	Severe Thunderstorm Watch	SPC	Ashley, Chicot, Columbia, Union	6 hr
Apr 24, 3:23 PM CDT	Mesoscale Discussion	SPC	Arkansas, Clay, Craighead, Crittenden, Cross, Desha and 18 more	67 min
Apr 24, 5:04 PM CDT	Mesoscale Discussion	SPC	Chicot	26 min
Apr 24, 6:40 PM CDT	Tornado Watch	SPC	Clay, Mississippi	5 hr
Apr 24, 4:22 PM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Buchanan, Cass, Clay, Clinton and 4 more	113 min

Nearby

Mesoscale Discussions in Kentucky, 2004 Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Tennessee, 2004 Every 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; radar from the NEXRAD Level II archive.