Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 410
The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2012, 12:30 AM EDT for 4 states. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Apr 2, 2012, 12:30 AM EDT (04:30 UTC)
- Expired
- Apr 2, 2012, 1:30 AM EDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 45 counties
Dearborn County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Floyd County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Johnson County, KY, Kenton County, KY, Lawrence County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Pike County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Hamilton County, OH, Lawrence County, OH, Cabell County, WV, Lincoln County, WV, Logan County, WV, Mingo County, WV, Wayne County, WV
The radar
The Jackson,KY radar (KJKL), 80 km from the middle of the area, began a volume at 04:31 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 4.5 hours before the alert went out and 130 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
- 663 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 943 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 267 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.4
The text
As transmitted, in the capitals the NWS used until 2016.
295
ACUS11 KWNS 020430
SWOMCD
SPC MCD 020430
WVZ000-VAZ000-KYZ000-OHZ000-INZ000-020530-
MESOSCALE DISCUSSION 0410
NWS STORM PREDICTION CENTER NORMAN OK
1130 PM CDT SUN APR 01 2012
AREAS AFFECTED...NERN KY...FAR SRN OH...FAR SERN IND...FAR SWRN WV
CONCERNING...SEVERE THUNDERSTORM WATCH 125...
VALID 020430Z - 020530Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 125
CONTINUES.
TSTM CLUSTER FROM FAR SERN IND INTO FAR SWRN OH RAPIDLY WEAKENED
UNIFORMLY DURING THE PAST HOUR. THIS TREND APPEARS TO BE RELATED TO
A LOSS OF INSTABILITY...WHICH MAY BE TIED TO BOTH A COOLER/DRIER
BOUNDARY LAYER RELATIVE TO WHERE UPSTREAM DEVELOPMENT OCCURRED AND
RISING UPPER-LEVEL HEIGHTS MITIGATING STEEPER LAPSE RATES ALOFT.
THIS SUGGESTS THAT A DOWNSTREAM WW ISSUANCE WOULD BE
UNNEEDED...DESPITE CONVECTION LIKELY PERSISTING FOR THE NEXT SEVERAL
HOURS TOWARDS THE CNTRL APPALACHIANS. A BRIEF UPTICK OF EMBEDDED
CORES TO MARGINALLY SEVERE HAIL REMAINS POSSIBLE...BUT BOTH
INTENSITY/COVERAGE SHOULD NOT NEARLY BE AS PROLIFIC AS EARLIER
TONIGHT.
..GRAMS.. 04/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RLX...JKL...ILN...LMK...IND...
LAT...LON 39258546 39388516 38748276 38498210 38188179 37628162
37388166 37338190 37418239 37858368 38308469 38818528
39258546SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 1, 9:23 PM EDT | Mesoscale Discussion | SPC | Dearborn, Decatur, Fayette, Franklin, Hamilton, Hancock and 6 more | 67 min |
| Apr 1, 10:03 PM EDT | Severe Thunderstorm Watch | SPC | Bartholomew, Dearborn, Decatur, Fayette, Franklin, Hamilton and 11 more | 4 hr |
| Apr 1, 11:31 PM EDT | Mesoscale Discussion | SPC | Clark, Dearborn, Decatur, Franklin, Jefferson, Jennings and 4 more | 59 min |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in West 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.