Alert archive / Kentucky / Mesoscale Discussions in 2012
Mesoscale Discussion 409
The Storm Prediction Center issued this mesoscale discussion at Apr 1, 2012, 11:31 PM EDT for 10 counties in Indiana; 38 counties in Kentucky; 4 counties in Ohio. It was in force for 59 min.
The area
The outline as issued.
The facts
- Issued
- Apr 1, 2012, 11:31 PM EDT (03:31 UTC)
- Expired
- Apr 2, 2012, 12:30 AM EDT
- In force
- 59 min
- Issued by
- the Storm Prediction Center
All 52 counties
Clark County, IN, Dearborn County, IN, Decatur County, IN, Franklin County, IN, Jefferson County, IN, Jennings County, IN, Ohio County, IN, Ripley County, IN, Scott County, IN, Switzerland County, IN, Anderson County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jessamine County, KY, Kenton County, KY, Lewis County, KY, Madison County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Powell County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Wolfe County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Hamilton County, OH
The radar
The Cincinnati radar (KILN), 116 km from the middle of the area, began a volume at 03:30 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, 3.5 hours before the alert went out and 118 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.
820
ACUS11 KWNS 020332
SWOMCD
SPC MCD 020331
KYZ000-OHZ000-INZ000-020430-
MESOSCALE DISCUSSION 0409
NWS STORM PREDICTION CENTER NORMAN OK
1031 PM CDT SUN APR 01 2012
AREAS AFFECTED...SERN IND...SWRN OH...NERN KY
CONCERNING...SEVERE THUNDERSTORM WATCH 125...
VALID 020331Z - 020430Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 125
CONTINUES.
THREAT FOR SEVERE HAIL SHOULD DEVELOP ACROSS THE SRN PORTION OF WW
125 AND INTO PORTIONS OF NERN KY. COORDINATION ON A POSSIBLE
DOWNSTREAM SEVERE TSTM WATCH ISSUANCE WILL BE PERFORMED WITHIN THE
HOUR.
SMALL CLUSTER OF SEMI-DISCRETE TSTMS ACROSS SERN IND/SWRN OH WITH A
HISTORY OF PRODUCING SEVERE HAIL OF 1-1.5 IN SHOULD CONTINUE TO
PROGRESS SEWD ALONG A SWD-MOVING COLD FRONT. ALTHOUGH SURFACE
TEMPERATURES ARE NOW INTO THE LOWER TO MIDDLE 60S ACROSS MUCH OF
NERN KY...W/SWLY LOW-LEVEL INFLOW SHOULD SUSTAIN MARGINALLY BUOYANT
ELEVATED PARCELS. EFFECTIVE SHEAR AROUND 40 KT SHOULD REMAIN
CONDUCIVE TO SEVERE HAIL PRODUCTION ACROSS THE OH RIVER INTO NERN
KY.
..GRAMS.. 04/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...RLX...JKL...ILN...LMK...IND...
LAT...LON 39568578 39208393 38788307 38298295 37868304 37608350
37568323 37728436 37988506 38438571 39018590 39568578SPC 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 2, 12:30 AM EDT | Mesoscale Discussion | SPC | Dearborn, Ohio, Ripley, Switzerland | 60 min |
Nearby
Mesoscale Discussions in Kentucky, 2012Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Ohio, 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.