Alert archive / Kentucky / Mesoscale Discussions in 2011
Mesoscale Discussion 1841
The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2011, 12:26 PM CDT for 4 states. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2011, 12:26 PM CDT (17:26 UTC)
- Expired
- Aug 3, 2011, 1:30 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 102 counties
Pope County, IL, Adair County, KY, Allen County, KY, Barren County, KY, Bell County, KY, Boyle County, KY, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Casey County, KY, Christian County, KY, Clay County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Harlan County, KY, Hart County, KY, Hopkins County, KY, Jackson County, KY, Knox County, KY, Larue County, KY, Laurel County, KY, Leslie County, KY, Letcher County, KY, Lincoln County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McCreary County, KY, McLean County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Perry County, KY, Pulaski County, KY, Rockcastle County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Warren County, KY, Washington County, KY, Wayne County, KY, Webster County, KY, Whitley County, KY, Anderson County, TN, Campbell County, TN, Carter County, TN, Cheatham County, TN, Claiborne County, TN, Clay County, TN, Cumberland County, TN, Davidson County, TN, Dickson County, TN, Fentress County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Houston County, TN, Jackson County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Macon County, TN, Montgomery County, TN, Morgan County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Scott County, TN, Smith County, TN, Stewart County, TN, Sullivan County, TN, Sumner County, TN, Trousdale County, TN, Union County, TN, Washington County, TN, Wilson County, TN, City of Bristol, VA, City of Norton, VA, Dickenson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA
The radar
The Louisville radar (KLVX), 142 km from the middle of the area, began a volume at 17:27 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, 5.4 hours before the alert went out and 153 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
- 716 J/kg
- Mixed-layer CIN
- -276 J/kg
- Mixed-layer LCL
- 1509 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 |
|---|---|---|---|---|
| Aug 2, 8:34 PM CDT | Mesoscale Discussion | SPC | Cook, DeKalb, DuPage, Grundy, Kane, Kankakee and 4 more | 86 min |
| Aug 2, 11:25 PM CDT | Mesoscale Discussion | SPC | Iroquois | 95 min |
| Aug 3, 12:48 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Campbell, Carroll, Gallatin, Grant, Kenton and 2 more | 8 hr |
| Aug 3, 3:28 AM CDT | Mesoscale Discussion | SPC | Boyd, Greenup, Lewis | 92 min |
| Aug 3, 7:21 AM CDT | Mesoscale Discussion | SPC | Boyd, Greenup, Lewis | 84 min |
| Aug 3, 9:01 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Anderson, Bath, Bell, Boyle, Breathitt and 47 more | 7 hr |
| Aug 3, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 46 more | 6 hr |
| Aug 3, 6:43 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Boyle, Breckinridge and 49 more | 62 min |
| Aug 3, 12:03 PM CDT | Mesoscale Discussion | SPC | Accomack, Albemarle, Amelia, Amherst, Appomattox, Bedford and 79 more | 87 min |
Nearby
Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Tennessee, 2011Mesoscale Discussions in Virginia, 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.