Alert archive / Indiana / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 619
The Storm Prediction Center issued this severe thunderstorm watch at Sep 5, 2012, 9:37 AM CDT for 30 counties in Illinois; 49 counties in Indiana; 6 counties in Kentucky. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2012, 9:37 AM CDT (14:37 UTC)
- Expired
- Sep 5, 2012, 3:40 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 85 counties
Bond County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Lawrence County, IL, Marion County, IL, Moultrie County, IL, Perry County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Shelby County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Bartholomew County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Crawford County, IN, Daviess County, IN, Decatur County, IN, Delaware County, IN, Dubois 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, Howard 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, Orange County, IN, Owen County, IN, Parke County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Spencer County, IN, Sullivan County, IN, Tipton County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Warrick County, IN, Washington County, IN, Breckinridge County, KY, Daviess County, KY, Hancock County, KY, Henderson County, KY, Meade County, KY, Union County, KY
The radar
The Indianapolis radar (KIND), 104 km from the middle of the area, began a volume at 14:39 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 9:40 AM CDT | Severe Thunderstorm Warning | LSX | Fayette | 50 min |
| Sep 5, 9:52 AM CDT | Severe Thunderstorm Warning | ILX | Clay, Effingham | 38 min |
| Sep 5, 10:00 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 48 min |
| Sep 5, 10:23 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 32 min |
| Sep 5, 10:31 AM CDT | Severe Thunderstorm Warning | ILX | Clay, Effingham, Jasper, Richland | 59 min |
| Sep 5, 11:07 AM CDT | Severe Thunderstorm Warning | ILX | Lawrence, Richland | 38 min |
| Sep 5, 12:38 PM CDT | Severe Thunderstorm Warning | PAH | Gibson, Pike | 37 min |
| Sep 5, 12:52 PM CDT | Severe Thunderstorm Warning | PAH | Warrick | 38 min |
| Sep 5, 12:55 PM CDT | Severe Thunderstorm Warning | PAH | Vanderburgh | 25 min |
| Sep 5, 1:08 PM CDT | Severe Thunderstorm Warning | PAH | Spencer | 52 min |
| Sep 5, 1:38 PM CDT | Severe Thunderstorm Warning | LMK | Crawford, Dubois, Harrison, Perry | 32 min |
| Sep 5, 2:32 PM CDT | Severe Thunderstorm Warning | LMK | Floyd, Harrison | 28 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 2.6 hours before the alert went out and 136 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
- 1271 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 4, 8:30 PM CDT | Mesoscale Discussion | SPC | Jo Daviess | 60 min |
| Sep 4, 8:51 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Grundy and 13 more | 5 hr |
| Sep 5, 1:14 AM CDT | Mesoscale Discussion | SPC | Carroll, Henry, Jo Daviess, Rock Island, Stephenson, Whiteside and 1 more | 91 min |
| Sep 5, 3:43 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Grundy, Henderson and 21 more | 92 min |
| Sep 5, 9:04 AM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Clark, Clay, Clinton, Crawford and 28 more | 86 min |
| Sep 5, 1:10 PM CDT | Mesoscale Discussion | SPC | Gallatin, Hardin, Johnson, Massac, Pope | 65 min |
| Sep 5, 1:43 PM CDT | Severe Thunderstorm Watch | SPC | Hardin | 5 hr |
| Sep 5, 2:13 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 2 hr |
| Sep 5, 2:29 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Johnson, Massac, Pope, Pulaski, Union | 8 hr |
| Sep 5, 4:02 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 7 more | 88 min |
| Sep 5, 5:31 PM CDT | Mesoscale Discussion | SPC | Adair, Allen, Bath, Bourbon, Boyle, Casey and 28 more | 89 min |
Nearby
Severe Thunderstorm Watches in Indiana, 2012Severe Thunderstorm Watches in Illinois, 2012Severe Thunderstorm Watches in Kentucky, 2012Every severe thunderstorm watch 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.