Alert archive / Kentucky / Mesoscale Discussions in 2004
Mesoscale Discussion 204
The Storm Prediction Center issued this mesoscale discussion at Mar 20, 2004, 9:20 AM CST for 5 states. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Mar 20, 2004, 9:20 AM CST (15:20 UTC)
- Expired
- Mar 20, 2004, 10:45 AM CST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 38 counties
Alexander County, IL, Gallatin County, IL, Hardin County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Pulaski County, IL, Perry County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Breckinridge County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Hancock County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Ohio County, KY, Union County, KY, Webster County, KY, Butler County, MO, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Stoddard County, MO, Lake County, TN, Obion County, TN
The radar
The Paducah radar (KPAH), 17 km from the middle of the area, began a volume at 15:23 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
Nashville Metro, TN (KBNA), launched 12:00Z, 3.3 hours before the alert went out and 223 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1720 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 138 m²/s²
- 0-3 km storm-relative helicity
- 189 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 11:50 AM CST | Severe Thunderstorm Watch | SPC | Allen, Clinton, Cumberland, Monroe | 6 hr |
| Mar 20, 2:09 PM CST | Mesoscale Discussion | SPC | Clinton, Cumberland, McCreary, Monroe, Pulaski, Russell and 1 more | 66 min |
| Mar 20, 5:10 PM CST | Mesoscale Discussion | SPC | Allen, Cumberland, Monroe, Simpson | 65 min |
Nearby
Mesoscale Discussions in Kentucky, 2004Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Missouri, 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; radar from the NEXRAD Level II archive.