Alert archive / Indiana / Mesoscale Discussions in 2012
Mesoscale Discussion 394
The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2012, 9:25 PM CDT for 9 counties in Illinois; 17 counties in Indiana; 7 counties in Kentucky. It was in force for 35 min.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2012, 9:25 PM CDT (02:25 UTC)
- Expired
- Mar 30, 2012, 10:00 PM CDT
- In force
- 35 min
- Issued by
- the Storm Prediction Center
All 33 counties
Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Jackson County, IL, Saline County, IL, Union County, IL, White County, IL, Williamson County, IL, Clark County, IN, Crawford County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Jefferson County, IN, Jennings County, IN, Ohio County, IN, Orange County, IN, Pike County, IN, Posey County, IN, Scott County, IN, Spencer County, IN, Switzerland County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Boone County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Oldham County, KY, Trimble County, KY
The radar
The Evansville,IN radar (KVWX), 46 km from the middle of the area, began a volume at 02:25 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
Nashville Metro, TN (KBNA), launched 00:00Z, 2.4 hours before the alert went out and 241 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
- 22 J/kg
- Mixed-layer CIN
- -141 J/kg
- Mixed-layer LCL
- 1163 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
629
ACUS11 KWNS 310225
SWOMCD
SPC MCD 310225
KYZ000-OHZ000-INZ000-ILZ000-MOZ000-310300-
MESOSCALE DISCUSSION 0394
NWS STORM PREDICTION CENTER NORMAN OK
0925 PM CDT FRI MAR 30 2012
AREAS AFFECTED...FAR SRN IL AND FAR SRN IND
CONCERNING...SEVERE THUNDERSTORM WATCH 118...119...
VALID 310225Z - 310300Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH
118...119...CONTINUES.
ALTHOUGH AN ISOLATED STRONGER STORM MAY STILL OCCUR ACROSS FAR SRN
IL AND/OR FAR SRN IND AS THE ONGOING LINE OF TSTMS SHIFTS SWD...A
FURTHER INCREASE IN SURFACE BASED INHIBITION GIVEN THE LOSS OF DAY
TIME HEATING AND SUBSEQUENT REDUCTION IN AVAILABLE INSTABILITY
SUGGEST THE OVERALL SEVERE WEATHER THREAT WILL WANE. THE
COMBINATION OF MARGINAL INSTABILITY AND WEAKENING BULK SHEAR IS
INDICATIVE OF AN ENVIRONMENT BECOMING LESS FAVORABLE FOR ORGANIZED
STORMS.
..PETERS.. 03/31/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...LMK...IND...PAH...
LAT...LON 37788966 38418839 38488707 38978586 39028544 39168431
38658451 38308578 37978708 37678811 37608810 37458953
37788966SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 7:26 PM CDT | Mesoscale Discussion | SPC | Clay, Crawford, Edwards, Franklin, Hamilton, Jasper and 8 more | 64 min |
| Mar 30, 10:18 PM CDT | Mesoscale Discussion | SPC | Boyd, Carter, Greenup, Lewis | 57 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.