Alert archive / Illinois / Tornado Watches in 2010
Tornado Watch 61
The Storm Prediction Center issued this tornado watch at Apr 7, 2010, 1:24 PM CDT for 4 states. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2010, 1:24 PM CDT (18:24 UTC)
- Expired
- Apr 7, 2010, 8:54 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 121 counties
Alexander County, IL, Bond County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Iroquois County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Massac County, IL, McLean County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Sangamon County, IL, Shelby County, IL, Union County, IL, Vermilion County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Fountain County, IN, Fulton County, IN, Gibson County, IN, Howard County, IN, Jasper County, IN, Knox County, IN, Kosciusko County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Parke County, IN, Pike County, IN, Posey County, IN, Pulaski County, IN, Putnam County, IN, Starke County, IN, Sullivan County, IN, Tippecanoe County, IN, Vanderburgh County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, Warrick County, IN, White County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO
The radar
The Lincoln radar (KILX), 114 km from the middle of the area, began a volume at 18:26 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 1:58 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Macon | 47 min |
| Apr 7, 2:11 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Madison, Montgomery | 34 min |
| Apr 7, 2:28 PM CDT | Severe Thunderstorm Warning | ILX | McLean | 32 min |
| Apr 7, 2:38 PM CDT | Severe Thunderstorm Warning | PAH | Carter, Ripley | 52 min |
| Apr 7, 2:41 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 34 min |
| Apr 7, 2:42 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Macon, Piatt | 27 min |
| Apr 7, 2:47 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, LaSalle, Livingston | 43 min |
| Apr 7, 3:03 PM CDT | Severe Thunderstorm Warning | ILX | Effingham, Jasper | 42 min |
| Apr 7, 3:11 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 34 min |
| Apr 7, 3:46 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Fayette, Marion | 44 min |
| Apr 7, 3:47 PM CDT | Severe Thunderstorm Warning | IND | Carroll | 28 min |
| Apr 7, 4:01 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 44 min |
| Apr 7, 4:03 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Wayne | 14 min |
| Apr 7, 4:06 PM CDT | Severe Thunderstorm Warning | IWX | Cass, Fulton, Kosciusko, Miami, Wabash | 39 min |
| Apr 7, 4:08 PM CDT | Severe Thunderstorm Warning | IWX | Marshall, Pulaski, Saint Joseph, Starke | 37 min |
| Apr 7, 4:23 PM CDT | Severe Thunderstorm Warning | ILX | Effingham, Jasper | 52 min |
| Apr 7, 4:34 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Cape Girardeau | 41 min |
| Apr 7, 4:46 PM CDT | Flash Flood Warning | LSX | Clinton, Fayette, Marion | 6 hr |
| Apr 7, 4:48 PM CDT | Severe Thunderstorm Warning | IND | Fountain, Montgomery, Parke, Vermillion | 27 min |
| Apr 7, 4:53 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Jackson, Perry, Williamson | 37 min |
| Apr 7, 5:08 PM CDT | Severe Thunderstorm Warning | PAH | Union | 25 min |
| Apr 7, 5:11 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Crawford, Cumberland, Jasper | 49 min |
| Apr 7, 5:27 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Williamson | 33 min |
| Apr 7, 5:39 PM CDT | Severe Thunderstorm Warning | IND | Clay, Owen, Sullivan, Vigo | 51 min |
| Apr 7, 6:37 PM CDT | Tornado Warning | PAH | Gallatin, Saline | 18 min |
| Apr 7, 7:02 PM CDT | Severe Thunderstorm Warning | IND | Clay, Owen, Putnam, Sullivan, Vigo | 28 min |
| Apr 7, 8:16 PM CDT | Severe Thunderstorm Warning | PAH | Hopkins | 29 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, 6.4 hours before the alert went out and 99 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
- 814 m above ground
- 0-6 km bulk shear
- 82 kt
- 0-1 km storm-relative helicity
- -155 m²/s²
- 0-3 km storm-relative helicity
- -192 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 8:46 PM CDT | Mesoscale Discussion | SPC | Brown, Bureau, Carroll, Fulton, Hancock, Henderson and 14 more | 59 min |
| Apr 6, 9:28 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Boone, Brown, Bureau, Carroll, Cook and 28 more | 6 hr |
| Apr 7, 12:54 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clark, Clay, Clinton and 38 more | 3 hr |
| Apr 7, 3:15 PM CDT | Mesoscale Discussion | SPC | Alexander, Champaign, Clark, Clay, Coles, Crawford and 36 more | 2 hr |
| Apr 7, 5:43 PM CDT | Mesoscale Discussion | SPC | Alexander, Clark, Clay, Coles, Crawford, Cumberland and 25 more | 62 min |
| Apr 6, 8:28 PM CDT | Mesoscale Discussion | SPC | Carroll, Cass, Jackson, Lafayette, Livingston, Ray | 62 min |
| Apr 6, 11:24 PM CDT | Mesoscale Discussion | SPC | Audrain, Barton, Bates, Benton, Boone, Cass and 22 more | 66 min |
| Apr 7, 1:10 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Benton, Camden, Cedar, Christian and 19 more | 95 min |
| Apr 7, 1:29 PM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 3 hr |
| Apr 7, 1:55 PM CDT | Severe Thunderstorm Watch | SPC | Dunklin, Pemiscot | 8 hr |
| Apr 7, 5:26 PM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 2 hr |
Nearby
Tornado Watches in Illinois, 2010Tornado Watches in Indiana, 2010Tornado Watches in Kentucky, 2010Every tornado watch in 2010
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.