Alert archive / Indiana / Mesoscale Discussions in 2012
Mesoscale Discussion 614
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2012, 5:59 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2012, 5:59 PM CDT (22:59 UTC)
- Expired
- Apr 28, 2012, 8:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 81 counties
Bond County, IL, Calhoun County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Richland County, IL, Saint Clair County, IL, Shelby County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, Bartholomew County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Greene County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Ohio County, IN, Orange County, IN, Owen County, IN, Pike County, IN, Ripley County, IN, Scott County, IN, Sullivan County, IN, Switzerland County, IN, Vigo County, IN, Washington County, IN, Anderson County, KY, Boone County, KY, Carroll County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Oldham County, KY, Owen County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Woodford County, KY, City of Saint Louis, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Montgomery County, MO, Pike County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO
The radar
The Evansville,IN radar (KVWX), 45 km from the middle of the area, began a volume at 22:59 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
Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 208 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 681 m²/s²
- 0-3 km storm-relative helicity
- 811 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted, in the capitals the NWS used until 2016.
627
ACUS11 KWNS 282259
SWOMCD
SPC MCD 282259
KYZ000-INZ000-ILZ000-MOZ000-290100-
MESOSCALE DISCUSSION 0614
NWS STORM PREDICTION CENTER NORMAN OK
0559 PM CDT SAT APR 28 2012
AREAS AFFECTED...ERN MO...SRN IL...SRN IND AND NRN KY
CONCERNING...SEVERE THUNDERSTORM WATCH 197...198...
VALID 282259Z - 290100Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
197...198...CONTINUES.
SUBSTANTIAL INSTABILITY REMAINS S OF A BOUNDARY FROM MO EWD INTO KY
WHERE DEWPOINTS WERE IN THE LOW TO MID 60S F. MODEST SWLY LOW LEVEL
FLOW WAS HELPING TO MAINTAIN A FEED OF UNSTABLE AIR INTO THE ST.
LOUIS AREA...HELPING TO FUEL ADDITIONAL DEVELOPMENT WHERE A WEAK
SURFACE LOW WAS NOTED. SEVERE HAIL STORMS...POTENTIALLY WITH
DAMAGING WINDS AS WELL...SHOULD CONTINUE TO AFFECT THESE AREAS FOR A
FEW MORE HOURS...AND WATCH 197 MAY NEED TO BE EXTENDED IN
TIME...ALONG AND S OF THE PRIMARY BOUNDARY.
TO THE E...A LARGE CLUSTER OF CELLS WITH SEVERE WINDS AND HAIL
SHOULD PERSIST FOR A FEW HOURS AS IT TRAVELS DOWN THE BOUNDARY.
STRONG DEEP LAYER SHEAR AND COULD KEEP THIS CLUSTER GOING ACROSS THE
REMAINDER OF ERN KY THIS EVENING...WITH AN ADDITIONAL WATCH POSSIBLE
LATER.
..JEWELL.. 04/28/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...LMK...IND...PAH...ILX...LSX...SGF...
LAT...LON 37768442 38388757 38139161 39329157 39558753 38938440
37768442SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 1:17 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clay, Clinton, Crawford, Cumberland and 24 more | 88 min |
| Apr 28, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Clark, Clay, Clinton, Crawford and 20 more | 7 hr |
| Apr 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Bond, Clark, Clay, Clinton, Crawford, Cumberland and 13 more | 64 min |
| Apr 28, 5:15 PM CDT | Tornado Watch | SPC | Clinton, Edwards, Franklin, Gallatin, Hamilton, Jackson and 12 more | 5 hr |
| Apr 28, 6:12 PM CDT | Mesoscale Discussion | SPC | Franklin, Hamilton, Jefferson, Monroe, Perry, Randolph and 3 more | 2 hr |
| Apr 28, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 20 more | 6 hr |
| Apr 27, 7:00 PM CDT | Mesoscale Discussion | SPC | Andrew, Buchanan, Caldwell, Cass, Clay, Clinton and 6 more | 30 min |
| Apr 27, 7:18 PM CDT | Severe Thunderstorm Watch | SPC | Bates, Buchanan, Cass, Clay, Clinton, Jackson and 1 more | 95 min |
Nearby
Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Illinois, 2012Mesoscale Discussions in Kentucky, 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.