Alert archive / Indiana / Mesoscale Discussions in 2012
Mesoscale Discussion 203
The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2012, 7:50 AM CST for 18 counties in Illinois; 44 counties in Indiana; 7 counties in Ohio. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Mar 2, 2012, 7:50 AM CST (13:50 UTC)
- Expired
- Mar 2, 2012, 9:15 AM CST
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 69 counties
Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Lawrence County, IL, Marion County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL, Wabash County, IL, Wayne County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Fountain County, IN, Franklin County, IN, Gibson County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Ohio County, IN, Orange County, IN, Owen County, IN, Parke County, IN, Pike County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Union County, IN, Vermillion County, IN, Vigo County, IN, Washington County, IN, Wayne County, IN, Butler County, OH, Darke County, OH, Hamilton County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Warren County, OH
The radar
The Indianapolis radar (KIND), 76 km from the middle of the area, began a volume at 13:50 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
Lincoln, IL (KILX), launched 12:00Z, 1.8 hours before the alert went out and 159 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
- 1770 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
140
ACUS11 KWNS 021350
SWOMCD
SPC MCD 021350
OHZ000-KYZ000-INZ000-ILZ000-021515-
MESOSCALE DISCUSSION 0203
NWS STORM PREDICTION CENTER NORMAN OK
0750 AM CST FRI MAR 02 2012
AREAS AFFECTED...SE IL...SCNTRL IND AND SW OH
CONCERNING...SEVERE THUNDERSTORM WATCH 55...
VALID 021350Z - 021515Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 55
CONTINUES.
THE THREATS FOR LARGE HAIL AND ISOLATED WIND DAMAGE WILL LIKELY
CONTINUE ENEWD ACROSS SCNTRL IND AND MAY REACH SW OH BY MIDDAY. A WW
MAY BE NEEDED LATER THIS MORNING AS THE CONVECTIVE CLUSTER MOVES
TOWARD THE ERN EDGE OF WW 55.
A CLUSTER OF STRONG TO SEVERE THUNDERSTORMS IS ONGOING IN SCNTRL IL
ALONG A WARM FRONT EXTENDING NEWD FROM A SFC LOW IN SRN MO. THE
STORMS ARE ALSO BEING SUPPORTED BY LARGE-SCALE ASCENT ASSOCIATED
WITH A DISTURBANCE MOVING THROUGH THE MID MS VALLEY EVIDENT ON WATER
VAPOR IMAGERY. MESOANALYSIS ESTIMATES THAT MUCAPE VALUES NEAR THE
WARM FRONT ARE AROUND 1000 J/KG. IN ADDITION...FORECAST SOUNDINGS IN
SCNTRL IL AND SCNTRL IND SHOW 40 TO 50 KT OF EFFECTIVE SHEAR WITH
MID-LEVEL LAPSE RATES OF 7.5 C/KM. THIS ENVIRONMENT SHOULD SUPPORT A
LARGE HAIL THREAT WITH SUPERCELLS. A WIND DAMAGE THREAT COULD ALSO
EXIST BUT THE COOL STABLE AIRMASS SHOULD KEEP THIS POTENTIAL
ISOLATED.
..BROYLES.. 03/02/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...LMK...IND...PAH...ILX...LSX...
LAT...LON 39838893 39398932 38798922 38438878 38288780 38538629
39158426 39588384 40138414 40278544 40148767 39838893SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 2, 1:46 AM CST | Mesoscale Discussion | SPC | Jackson, Monroe, Perry, Randolph, Saint Clair | 89 min |
| Mar 2, 2:07 AM CST | Severe Thunderstorm Watch | SPC | Calhoun, Jersey, Madison, Monroe, Randolph, Saint Clair | 5 hr |
| Mar 2, 4:25 AM CST | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clark, Clay, Clinton and 30 more | 95 min |
| Mar 2, 5:52 AM CST | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 29 more | 6 hr |
| Mar 2, 9:22 AM CST | Mesoscale Discussion | SPC | Alexander, Crawford, Edwards, Franklin, Gallatin, Hamilton and 13 more | 113 min |
| Mar 2, 9:54 AM CST | Tornado Watch | SPC | Alexander, Bond, Champaign, Christian, Clark, Clay and 41 more | 6 hr |
| Mar 2, 10:02 AM CST | Mesoscale Discussion | SPC | Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 3 more | 88 min |
| Mar 2, 11:06 AM CST | Mesoscale Discussion | SPC | Boone, Carroll, Hancock, Henderson, Henry, Jo Daviess and 9 more | 4 hr |
| Mar 2, 12:05 PM CST | Mesoscale Discussion | SPC | Gallatin, Hardin, Johnson, Massac, Pope, Saline and 2 more | 85 min |
| Mar 2, 3:40 AM CST | Mesoscale Discussion | SPC | Crawford, Dubois, Harrison, Perry, Pike, Spencer and 1 more | 65 min |
| Mar 2, 10:30 AM CST | Mesoscale Discussion | SPC | Adams, Blackford, Dearborn, Delaware, Fayette, Franklin and 7 more | 90 min |
| Mar 2, 12:02 PM CST | Tornado Watch | SPC | Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 25 more | 8 hr |
| Mar 2, 2:35 PM CST | Mesoscale Discussion | SPC | Clark, Dearborn, Floyd, Franklin, Harrison, Jefferson and 4 more | 85 min |
| Mar 2, 3:19 PM CST | Tornado Watch | SPC | Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more | 6 hr |
Nearby
Mesoscale Discussions in Indiana, 2012Mesoscale Discussions in Illinois, 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.