Alert archive / Kentucky / Mesoscale Discussions in 2011
Mesoscale Discussion 167
The Storm Prediction Center issued this mesoscale discussion at Feb 28, 2011, 4:25 AM EST for 4 counties in Indiana; 34 counties in Kentucky; Adams County, Ohio. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Feb 28, 2011, 4:25 AM EST (09:25 UTC)
- Expired
- Feb 28, 2011, 5:30 AM EST
- In force
- 65 min
- Issued by
- the Storm Prediction Center
All 39 counties
Clark County, IN, Floyd County, IN, Harrison County, IN, Perry County, IN, Anderson County, KY, Bourbon County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Carroll County, KY, Daviess County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Mason County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Washington County, KY, Webster County, KY, Woodford County, KY, Adams County, OH
The radar
The Louisville radar (KLVX), 3 km from the middle of the area, began a volume at 09:26 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 00:00Z, 9.4 hours before the alert went out and 211 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
- 184 J/kg
- Mixed-layer CIN
- -38 J/kg
- Mixed-layer LCL
- 1385 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
008
ACUS11 KWNS 280926
SWOMCD
SPC MCD 280925
OHZ000-KYZ000-INZ000-281030-
MESOSCALE DISCUSSION 0167
NWS STORM PREDICTION CENTER NORMAN OK
0325 AM CST MON FEB 28 2011
AREAS AFFECTED...FAR SERN/SRN IND INTO NRN KY
CONCERNING...TORNADO WATCH 28...29...
VALID 280925Z - 281030Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 28...29...CONTINUES.
GREATEST THREAT FOR DAMAGING WINDS AND TORNADOES EXPECTED ACROSS THE
NRN EXTENT WW 29...SPREADING FROM SRN IND INTO NRN KY. PARTS OF
WW/S 28 AND 29 WILL LIKELY NEED TO BE EXTENDED INTO NRN KY BY
0930Z...GIVEN FASTING MOVING LINE OF STORMS EXPECTED TO EXIT WW 29
BY 10Z.
AT 09Z...REGIONAL RADAR IMAGERY SHOWED A FAST MOVING /55-60 KT/ LINE
OF STORMS EXTENDING NNE-SSW FROM WASHINGTON INTO HARRISON COUNTIES
IN EXTREME SRN IND. THIS LINE...WITH BOWING TENDENCIES AT
TIMES...HAS A HISTORY OF DAMAGE ACROSS SWRN IND /REFERENCE LOCAL
STORM REPORTS FROM WFO PAH FOR GIBSON COUNTY/. AIR MASS IMMEDIATELY
DOWNSTREAM OF THESE FAST MOVING STORMS REMAINS UNSEASONABLY WARM AND
MOIST...WITH NO INHIBITION. THUS...THREAT FOR DAMAGING WINDS AND
TORNADOES IS EXPECTED TO PERSIST EWD INTO NRN KY EARLY THIS MORNING.
FARTHER SW...RADAR IMAGERY SHOWED THE GUST FRONT HAS MOVED EWD JUST
AHEAD OF THE TSTMS EXTENDING INTO WRN KY...THOUGH A THREAT FOR
DAMAGING WINDS WILL PERSIST IN THE SHORT TERM...GIVEN STRENGTH OF
LOW LEVEL WINDS /60 KT/ PER AREA VWPS.
..PETERS.. 02/28/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...JKL...ILN...LMK...PAH...
LAT...LON 37488800 38218653 38808527 38858324 38278401 37688498
37478646 37448729 37488800SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 27, 9:25 PM EST | Mesoscale Discussion | SPC | Boone, Brown, Clay, Clinton, Daviess, Dubois and 25 more | 65 min |
| Feb 28, 12:46 AM EST | Tornado Watch | SPC | Bartholomew, Boone, Brown, Clay, Daviess, Decatur and 29 more | 5 hr |
| Feb 28, 1:28 AM EST | Mesoscale Discussion | SPC | Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more | 32 min |
| Feb 28, 1:40 AM EST | Tornado Watch | SPC | Dearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more | 6 hr |
| Feb 28, 2:05 AM EST | Mesoscale Discussion | SPC | Clark, Crawford, Floyd, Harrison, Perry, Spencer and 3 more | 25 min |
| Feb 28, 2:33 AM EST | Tornado Watch | SPC | Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more | 7 hr |
| Feb 28, 3:32 AM EST | Mesoscale Discussion | SPC | Bartholomew, Brown, Dearborn, Decatur, Fayette, Franklin and 14 more | 58 min |
| Feb 28, 5:31 AM EST | Mesoscale Discussion | SPC | Bath, Boyd, Breathitt, Carter, Clay, Elliott and 31 more | 29 min |
| Feb 28, 5:47 AM EST | Tornado Watch | SPC | Bath, Bell, Boyd, Breathitt, Carter, Clay and 31 more | 5 hr |
Nearby
Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Ohio, 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.