Alert archive / Kentucky / Mesoscale Discussions in 2013
Mesoscale Discussion 2103
The Storm Prediction Center issued this mesoscale discussion at Dec 21, 2013, 4:21 PM EST for 12 counties in Indiana; 29 counties in Kentucky. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Dec 21, 2013, 4:21 PM EST (21:21 UTC)
- Expired
- Dec 21, 2013, 5:15 PM EST
- In force
- 54 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 41 counties
Clark County, IN, Crawford County, IN, Dubois County, IN, Floyd County, IN, Harrison County, IN, Jefferson County, IN, Orange County, IN, Perry County, IN, Scott County, IN, Spencer County, IN, Warrick County, IN, Washington County, IN, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Graves County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Henry County, KY, Hopkins County, KY, Jefferson County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Oldham County, KY, Todd County, KY, Trigg County, KY, Trimble County, KY, Union County, KY, Webster County, KY
The radar
The Ft Campbell radar (KHPX), 88 km from the middle of the area, began a volume at 21:22 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, 9.4 hours before the alert went out and 164 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
- 705 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 564 m²/s²
- 0-3 km storm-relative helicity
- 578 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Dec 21, 5:49 PM EST | Tornado Watch | SPC | Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 6 more | 5 hr |
| Dec 21, 11:45 AM EST | Mesoscale Discussion | SPC | Fulton | 60 min |
Nearby
Mesoscale Discussions in Kentucky, 2013Mesoscale Discussions in Indiana, 2013Every mesoscale discussion in 2013
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.