Alert archive / Indiana / Mesoscale Discussions in 2012
Mesoscale Discussion 334
The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2012, 1:28 PM CDT for 16 counties in Illinois; 18 counties in Indiana; 15 counties in Kentucky. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Mar 23, 2012, 1:28 PM CDT (18:28 UTC)
- Expired
- Mar 23, 2012, 2:30 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 49 counties
Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edwards County, IL, Effingham County, IL, Hamilton County, IL, Jasper County, IL, Jefferson County, IL, Lawrence County, IL, Marion County, IL, Richland County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Clay County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Greene County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Orange County, IN, Owen County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Vigo County, IN, Warrick County, IN, Butler County, KY, Caldwell County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, Logan County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Union County, KY, Webster County, KY
The radar
The Evansville,IN radar (KVWX), 7 km from the middle of the area, began a volume at 18:30 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 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, 6.5 hours before the alert went out and 222 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
- 808 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
978
ACUS11 KWNS 231829
SWOMCD
SPC MCD 231828
KYZ000-INZ000-ILZ000-231930-
MESOSCALE DISCUSSION 0334
NWS STORM PREDICTION CENTER NORMAN OK
0128 PM CDT FRI MAR 23 2012
AREAS AFFECTED...CNTRL/SRN IL...SWRN IND...WRN KY
CONCERNING...SEVERE THUNDERSTORM WATCH 101...
VALID 231828Z - 231930Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 101
CONTINUES.
LARGE HAIL AND LOCALLY DAMAGING WINDS SHOULD REMAIN THE PRIMARY
THREAT THIS AFTERNOON...WITH TORNADIC POTENTIAL LIKELY REMAINING
LOCALIZED/MARGINAL.
LONGER-LIVED SUPERCELL INVOF WASHINGTON/JEFFERSON COUNTIES IN SRN IL
HAD A HISTORY OF BRIEF TORNADIC TOUCHDOWNS. BUT THIS CELL HAS
RECENTLY MERGED WITHIN A GROWING CLUSTER ARCING E/SWD INTO WRN
KY...WHICH HAS DISRUPTED MORE INTENSE UPDRAFT ROTATION. FARTHER
E...ROUGHLY AN 80-100 SM CORRIDOR OF FEW TO SCATTERED CLOUDS BETWEEN
THIS CLUSTER AND THE LEADING EDGE OF THE REMNANT DRY SLOT HAS
ALLOWED SURFACE TEMPERATURES TO WARM INTO THE MIDDLE 70S WITH DEW
POINTS FALLING INTO THE MIDDLE 50S. WITH LOWERING BOUNDARY LAYER RH
AND DEEPER MIXING...AMIDST A MODEST LOW-LEVEL WIND PROFILE...A
HAIL/WIND THREAT IS LARGELY EXPECTED TO EVOLVE E/NEWD.
..GRAMS.. 03/23/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LMK...IND...PAH...ILX...LSX...
LAT...LON 38358912 39308861 39528822 39658763 39248660 38778643
37798649 36758676 36778738 36878805 37808819 38108884
38358912SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 9:46 AM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Crawford, Edwards, Franklin, Gallatin and 20 more | 119 min |
| Mar 23, 11:44 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Champaign, Christian, Clark, Clay and 36 more | 7 hr |
| Mar 23, 1:58 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 12 more | 2 hr |
| Mar 23, 3:17 PM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Coles, Crawford, Cumberland, Douglas and 9 more | 58 min |
| Mar 23, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Ford, Iroquois, Kankakee | 4 hr |
| Mar 23, 6:43 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 18 more | 32 min |
| Mar 23, 5:08 PM CDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clark, Crawford, Dearborn, Decatur and 25 more | 37 min |
| Mar 23, 5:25 PM CDT | Tornado Watch | SPC | Bartholomew, Boone, Brown, Carroll, Clark, Clinton and 39 more | 7 hr |
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.