Alert archive / Kentucky / Mesoscale Discussions in 2011
Mesoscale Discussion 519
The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2011, 4:48 PM EDT for 4 counties in Indiana; 39 counties in Kentucky. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2011, 4:48 PM EDT (20:48 UTC)
- Expired
- Apr 22, 2011, 6:15 PM EDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
All 43 counties
Clark County, IN, Jefferson County, IN, Ohio County, IN, Switzerland County, IN, Anderson County, KY, Bath County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Bullitt County, KY, Carroll County, KY, Clark County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Lincoln County, KY, Madison County, KY, Marion County, KY, Mason County, KY, Menifee County, KY, Mercer County, KY, Montgomery County, KY, Nelson County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Powell County, KY, Robertson County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Washington County, KY, Woodford County, KY
The radar
The Louisville radar (KLVX), 109 km from the middle of the area, began a volume at 20:49 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.8 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
- 1683 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 452 m²/s²
- 0-3 km storm-relative helicity
- 501 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 |
|---|---|---|---|---|
| Apr 22, 2:14 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Daviess, Dubois and 19 more | 61 min |
| Apr 22, 2:31 PM EDT | Severe Thunderstorm Watch | SPC | Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 26 more | 4 hr |
| Apr 22, 6:27 PM EDT | Mesoscale Discussion | SPC | Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 6 more | 33 min |
| Apr 22, 6:49 PM EDT | Tornado Watch | SPC | Clark, Crawford, Daviess, Dubois, Floyd, Gibson and 11 more | 7 hr |
Nearby
Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Indiana, 2011Every mesoscale discussion in 2011
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.