Alert archive / Indiana / Mesoscale Discussions in 2011
Mesoscale Discussion 971
The Storm Prediction Center issued this mesoscale discussion at May 25, 2011, 7:40 PM CDT for 12 counties in Illinois; 48 counties in Indiana; 31 counties in Kentucky. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 25, 2011, 7:40 PM CDT (00:40 UTC)
- Expired
- May 25, 2011, 9:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 91 counties
Clark County, IL, Crawford County, IL, Edgar County, IL, Edwards County, IL, Gallatin County, IL, Hardin County, IL, Lawrence County, IL, Massac County, IL, Pope County, IL, Richland County, IL, Wabash County, IL, White County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clark County, IN, Clay County, IN, Clinton County, IN, Crawford County, IN, Daviess County, IN, Decatur County, IN, Dubois County, IN, Floyd County, IN, Fountain County, IN, Gibson County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Harrison County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Jefferson 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, Orange County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warrick County, IN, Washington County, IN, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Graves County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Jefferson County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Webster County, KY
The radar
The Evansville,IN radar (KVWX), 52 km from the middle of the area, began a volume at 00:41 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
Nashville Metro, TN (KBNA), launched 00:00Z, 0.7 hours before the alert went out and 250 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
- 1870 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1479 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 334 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 14.1
The text
As transmitted, in the capitals the NWS used until 2016.
255
ACUS11 KWNS 260041
SWOMCD
SPC MCD 260040
INZ000-KYZ000-TNZ000-ILZ000-260245-
MESOSCALE DISCUSSION 0971
NWS STORM PREDICTION CENTER NORMAN OK
0740 PM CDT WED MAY 25 2011
AREAS AFFECTED...SERN IL...CNTRL AND SRN INDIANA...WRN KY
CONCERNING...TORNADO WATCH 370...375...
VALID 260040Z - 260245Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 370...375...CONTINUES.
A SIGNIFICANT STRAIGHT-LINE WIND THREAT IS DEVELOPING FROM IL INTO
INDIANA AND WRN KY. LATEST SURFACE MAP SHOWS TIGHT PRESSURE
RISE/FALL COUPLET ASSOCIATED WITH THE CONGEALED LINE OF STORMS WITH
EMBEDDED SUPERCELLS. WITH STRONG SHEAR PROFILES IN PLACE...THESE
STORMS WILL LIKELY PRODUCE A LARGE AREA OF WIND DAMAGE...WITH
LOCALLY INTENSE DAMAGE SWATHS POSSIBLE.
..JEWELL.. 05/26/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILN...LMK...OHX...IND...PAH...ILX...MEG...
LAT...LON 36488912 37578856 38548819 39728795 40118771 40318680
40308574 40048538 39398529 38668547 37558589 36748650
36638726 36528808 36488912SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 7:14 PM CDT | Mesoscale Discussion | SPC | Dearborn, Ohio, Switzerland | 2 hr |
| May 25, 8:33 PM CDT | Tornado Watch | SPC | Clark, Crawford, Dearborn, Dubois, Fayette, Floyd and 14 more | 7 hr |
| May 25, 11:23 PM CDT | Mesoscale Discussion | SPC | Adams, Blackford, Delaware, Fayette, Franklin, Grant and 9 more | 2 hr |
| May 26, 12:15 PM CDT | Mesoscale Discussion | SPC | Letcher, Pike | 90 min |
| May 26, 2:09 PM CDT | Mesoscale Discussion | SPC | Adair, Anderson, Bath, Bourbon, Boyle, Bracken and 49 more | 96 min |
| May 26, 3:30 PM CDT | Mesoscale Discussion | SPC | Pike | 60 min |
Nearby
Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Kentucky, 2011Mesoscale Discussions in Illinois, 2011Every mesoscale discussion in 2011
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.