Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 192
The Storm Prediction Center issued this mesoscale discussion at Feb 29, 2012, 8:33 PM EST for 15 counties in Kentucky; 12 counties in Tennessee; 5 counties in Virginia. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- Feb 29, 2012, 8:33 PM EST (01:33 UTC)
- Expired
- Feb 29, 2012, 9:30 PM EST
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 32 counties
Bell County, KY, Breathitt County, KY, Clay County, KY, Floyd County, KY, Harlan County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Leslie County, KY, Letcher County, KY, McCreary County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Whitley County, KY, Anderson County, TN, Campbell County, TN, Claiborne County, TN, Grainger County, TN, Hancock County, TN, Hawkins County, TN, Knox County, TN, Morgan County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Union County, TN, City of Norton, VA, Dickenson County, VA, Lee County, VA, Scott County, VA, Wise County, VA
The radar
The Knoxville radar (KMRX), 67 km from the middle of the area, began a volume at 01:34 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 nearest sounding before it
Nashville Metro, TN (KBNA), launched 00:00Z, 1.6 hours before the alert went out and 242 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
- 843 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 623 m above ground
- 0-6 km bulk shear
- 91 kt
- 0-1 km storm-relative helicity
- 369 m²/s²
- 0-3 km storm-relative helicity
- 351 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 7.5
The text
As transmitted, in the capitals the NWS used until 2016.
978
ACUS11 KWNS 010133
SWOMCD
SPC MCD 010133
VAZ000-TNZ000-KYZ000-010230-
MESOSCALE DISCUSSION 0192
NWS STORM PREDICTION CENTER NORMAN OK
0733 PM CST WED FEB 29 2012
AREAS AFFECTED...EASTERN PORTIONS OF TN/KY TO FAR WESTERN VA
CONCERNING...TORNADO WATCH 48...
VALID 010133Z - 010230Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 48 CONTINUES.
THE SEVERE THREAT WILL CONTINUE TO QUICKLY DIMINISH/SHIFT EASTWARD
OUT OF TORNADO WATCH 48...WITH NO APPRECIABLE SEVERE DEVELOPMENT
OTHERWISE ANTICIPATED NEAR THE COLD FRONT. AS SUCH...TORNADO WATCH
48 WILL BE ALLOWED TO EXPIRE AT/BY 02Z.
THE PRE-COLD FRONTAL BAND OF TSTMS CONTINUES TO QUICKLY SHIFT
EASTWARD INTO WESTERN PORTIONS OF NC OUT OF TORNADO WATCH 48.
MEANWHILE...IN SPITE OF A RESIDUALLY MOIST/SOMEWHAT UNSTABLE
BOUNDARY LAYER...WEAKENING CONVERGENCE AND INCREASING DRY
AIR/SUBSIDENCE ALOFT SUGGEST THAT APPRECIABLE DEEP CONVECTIVE
DEVELOPMENT NEAR THE EASTWARD ADVANCING COLD FRONT /CURRENTLY ACROSS
WEST-CENTRAL PORTIONS OF KY AND TN/ IS UNLIKELY.
..GUYER.. 03/01/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RLX...MRX...JKL...OHX...
LAT...LON 35508500 36098499 36988475 37598331 37648236 36728229
35508500SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 12:20 AM EST | Mesoscale Discussion | SPC | Anderson, Blount, Carter, Cocke, Grainger, Greene and 13 more | 85 min |
| Mar 1, 3:21 AM EST | Mesoscale Discussion | SPC | Brunswick, Dinwiddie, Greensville, Isle of Wight, Prince George, Southampton and 13 more | 54 min |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Tennessee, 2012Mesoscale Discussions in Virginia, 2012Every mesoscale discussion in 2012
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.