Alert archive / Illinois / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 167

May 11, 201654 counties in Illinois; 6 counties in Indiana; 14 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at May 11, 2016, 12:10 PM CDT for 54 counties in Illinois; 6 counties in Indiana; 14 counties in Missouri. It was in force for 12 hr.

The area

The outline as issued.

The facts

Issued: May 11, 2016, 12:10 PM CDT (17:10 UTC)
Expired: May 12, 2016, 12:00 AM CDT
In force: 12 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 74 counties

Bond County, IL, Calhoun County, IL, Cass 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, Franklin County, IL, Gallatin County, IL, Greene County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Mason County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Pike County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Saline County, IL, Sangamon County, IL, Scott 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, Gibson County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Bollinger County, MO, Cape Girardeau County, MO, City of Saint Louis, MO, Franklin County, MO, Jefferson County, MO, Lincoln County, MO, Perry County, MO, Pike County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Warren County, MO, Washington County, MO

The radar

The Lincoln radar (KILX), 102 km from the middle of the area, began a volume at 17:13 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: 2%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

108 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 11, 12:26 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	49 min
May 11, 12:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	46 min
May 11, 12:47 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis	28 min
May 11, 1:08 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	52 min
May 11, 1:12 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	48 min
May 11, 1:17 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard, Morgan, Sangamon	28 min
May 11, 1:38 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Menard, Sangamon	37 min
May 11, 1:51 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	54 min
May 11, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	65 min
May 11, 2:08 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Sangamon	37 min
May 11, 2:12 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	63 min
May 11, 2:32 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison, Washington	43 min
May 11, 2:46 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson, Wayne	44 min
May 11, 2:48 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon, Piatt	42 min
May 11, 3:02 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	43 min
May 11, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	49 min
May 11, 3:13 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Washington	47 min
May 11, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	45 min
May 11, 3:18 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Piatt	42 min
May 11, 3:21 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Richland	39 min
May 11, 3:28 PM CDT	Severe Thunderstorm Warning	PAH	Wayne	47 min
May 11, 3:29 PM CDT	Severe Thunderstorm Warning	PAH	Jefferson	46 min
May 11, 3:34 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	56 min
May 11, 3:34 PM CDT	Tornado Warning	PAH	Jefferson	26 min
May 11, 3:43 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	33 min
May 11, 3:44 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	46 min
May 11, 3:52 PM CDT	Flash Flood Warning	LSX	Clinton, Monroe, Randolph, Saint Clair, Washington	4 hr
May 11, 3:57 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	63 min
May 11, 3:58 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Jasper, Lawrence, Richland	62 min
May 11, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair, Washington	19 min
May 11, 4:00 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence, Richland	45 min
May 11, 4:02 PM CDT	Severe Thunderstorm Warning	PAH	Edwards, Wabash, White	43 min
May 11, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois, Washington	40 min
May 11, 4:13 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Jefferson	47 min
May 11, 4:16 PM CDT	Severe Thunderstorm Warning	PAH	Edwards, Hamilton, Wayne, White	44 min
May 11, 4:17 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Cumberland, Effingham, Jasper, Richland, Shelby	43 min
May 11, 4:31 PM CDT	Tornado Warning	ILX	Cumberland, Effingham, Jasper	29 min
May 11, 4:35 PM CDT	Tornado Warning	PAH	Wabash	25 min
May 11, 4:44 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	46 min
May 11, 4:44 PM CDT	Severe Thunderstorm Warning	PAH	Edwards, Wabash	31 min
May 11, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	60 min
May 11, 4:49 PM CDT	Tornado Warning	PAH	Wabash	11 min
May 11, 4:51 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence, Richland	39 min
May 11, 4:58 PM CDT	Tornado Warning Tornado observed	PAH	White	32 min
May 11, 4:59 PM CDT	Severe Thunderstorm Warning	PAH	Edwards, Wabash	31 min
May 11, 5:02 PM CDT	Flash Flood Warning	ILX	Effingham	3 hr
May 11, 5:02 PM CDT	Tornado Warning	PAH	Edwards, Wabash	28 min
May 11, 5:08 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Jasper	37 min
May 11, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike, Ralls	44 min
May 11, 5:17 PM CDT	Tornado Warning	PAH	Gibson, Pike, Posey, Vanderburgh, Warrick	58 min
May 11, 5:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	42 min
May 11, 5:21 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Perry	39 min
May 11, 5:23 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	52 min
May 11, 5:26 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence	19 min
May 11, 5:26 PM CDT	Flash Flood Warning	LSX	Randolph	4 hr
May 11, 5:34 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Hamilton, Saline, Williamson	56 min
May 11, 5:37 PM CDT	Severe Thunderstorm Warning	PAH	Gallatin, White	38 min
May 11, 5:42 PM CDT	Severe Thunderstorm Warning	PAH	Pike, Spencer, Vanderburgh, Warrick	63 min
May 11, 5:43 PM CDT	Severe Thunderstorm Warning	PAH	Jackson, Perry	32 min
May 11, 5:45 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	45 min
May 11, 5:47 PM CDT	Flash Flood Warning	PAH	Gibson	3 hr
May 11, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	64 min
May 11, 5:59 PM CDT	Tornado Warning Tornado observed	PAH	Pike, Warrick	31 min
May 11, 6:00 PM CDT	Tornado Warning	PAH	Franklin, Hamilton, Saline, Williamson	30 min
May 11, 6:05 PM CDT	Severe Thunderstorm Warning	PAH	Jackson	25 min
May 11, 6:08 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Perry, Williamson	52 min
May 11, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Lincoln, Montgomery, Warren	48 min
May 11, 6:18 PM CDT	Tornado Warning	PAH	Jackson	42 min
May 11, 6:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Washington	46 min
May 11, 6:30 PM CDT	Tornado Warning	PAH	Franklin, Jackson, Perry, Williamson	30 min
May 11, 6:33 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Gallatin, Hamilton, Saline, White, Williamson	27 min
May 11, 6:42 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	48 min
May 11, 6:45 PM CDT	Tornado Warning Tornado observed	PAH	Franklin, Hamilton, Saline, Williamson	45 min
May 11, 6:50 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Pike	40 min
May 11, 6:58 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Perry, Williamson	47 min
May 11, 7:03 PM CDT	Severe Thunderstorm Warning	PAH	Gallatin, White	27 min
May 11, 7:06 PM CDT	Severe Thunderstorm Warning	PAH	Williamson	24 min
May 11, 7:08 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	52 min
May 11, 7:14 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
May 11, 7:18 PM CDT	Flash Flood Warning	PAH	Franklin, Hamilton, Saline, Williamson	3 hr
May 11, 7:18 PM CDT	Severe Thunderstorm Warning	PAH	Union	42 min
May 11, 7:19 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Jefferson, Saint Charles, Saint Louis, Warren	41 min
May 11, 7:24 PM CDT	Severe Thunderstorm Warning	LSX	Washington	36 min
May 11, 7:31 PM CDT	Severe Thunderstorm Warning	PAH	Williamson	29 min
May 11, 7:33 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe, Pike, Ralls	42 min
May 11, 7:38 PM CDT	Severe Thunderstorm Warning	PAH	Gallatin, Saline	37 min
May 11, 7:51 PM CDT	Severe Thunderstorm Warning	PAH	Johnson, Union, Williamson	39 min
May 11, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	48 min
May 11, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	48 min
May 11, 7:59 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
May 11, 8:03 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	42 min
May 11, 8:15 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison	45 min
May 11, 8:15 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Washington	30 min
May 11, 8:28 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Fulton, Mason, Schuyler	47 min
May 11, 8:45 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
May 11, 8:48 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	42 min
May 11, 9:18 PM CDT	Flash Flood Warning	LSX	Monroe, Randolph	6 hr
May 11, 9:24 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	6 hr
May 11, 9:29 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	61 min
May 11, 10:01 PM CDT	Severe Thunderstorm Warning	PAH	Perry	29 min
May 11, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	46 min
May 11, 10:29 PM CDT	Severe Thunderstorm Warning	PAH	Jackson, Perry	31 min
May 11, 10:31 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair, Washington	59 min
May 11, 10:51 PM CDT	Flash Flood Warning	PAH	Perry	3 hr
May 11, 10:59 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Perry, Williamson	31 min
May 11, 11:19 PM CDT	Flash Flood Warning	PAH	Jackson	3 hr
May 11, 11:33 PM CDT	Flash Flood Warning	PAH	White	3 hr
May 11, 11:51 PM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Sainte Genevieve, Saint Francois, Washington	6 hr

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, 5.2 hours before the alert went out and 134 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 11:20 AM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Clay, Clinton, Effingham and 11 more	55 min
May 11, 2:19 PM CDT	Mesoscale Discussion	SPC	Bond, Brown, Calhoun, Cass, Christian, Clark and 33 more	56 min
May 11, 3:39 PM CDT	Mesoscale Discussion	SPC	Lawrence, Wabash	66 min
May 11, 5:30 PM CDT	Mesoscale Discussion	SPC	Gallatin, Hardin	2 hr
May 11, 6:30 PM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Clinton, Franklin, Gallatin, Greene and 19 more	7 hr
May 11, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	Bartholomew, Brown, Clay, Crawford, Daviess, Dubois and 25 more	5 hr
May 11, 2:02 AM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Bates, Buchanan, Caldwell, Cass and 9 more	118 min
May 11, 3:10 AM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Bates, Buchanan, Caldwell, Cass and 12 more	5 hr
May 11, 5:34 AM CDT	Mesoscale Discussion	SPC	Andrew, Atchison, Bates, Benton, Buchanan, Caldwell and 28 more	101 min
May 11, 3:07 PM CDT	Mesoscale Discussion	SPC	Audrain, Boone, Callaway, Camden, Christian, Cole and 27 more	53 min

Nearby

Severe Thunderstorm Watches in Illinois, 2016 Severe Thunderstorm Watches in Missouri, 2016 Severe Thunderstorm Watches in Indiana, 2016 Every severe thunderstorm watch in 2016

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.