Alert archive / Illinois / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 163
The Storm Prediction Center issued this severe thunderstorm watch at Apr 26, 2017, 12:46 PM CDT for 25 counties in Illinois; 12 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2017, 12:46 PM CDT (17:46 UTC)
- Expired
- Apr 26, 2017, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 37 counties
Alexander County, IL, Bond County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Crawford County, IL, Cumberland County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Lawrence County, IL, Marion County, IL, Perry County, IL, Pulaski County, IL, Randolph County, IL, Richland County, IL, Union County, IL, Washington County, IL, Wayne County, IL, Williamson County, IL, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Madison County, MO, Perry 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 St Louis radar (KLSX), 121 km from the middle of the area, began a volume at 17:45 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
- 10%
- 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
- 50%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 12:49 PM CDT | Severe Thunderstorm Warning | PAH | Butler, Carter, Wayne | 26 min |
| Apr 26, 1:13 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Perry | 32 min |
| Apr 26, 1:14 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 46 min |
| Apr 26, 1:17 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Wayne | 43 min |
| Apr 26, 1:49 PM CDT | Severe Thunderstorm Warning | PAH | Bollinger, Cape Girardeau, Perry | 26 min |
| Apr 26, 1:54 PM CDT | Severe Thunderstorm Warning | LSX | Randolph, Saint Clair, Washington | 51 min |
| Apr 26, 1:56 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Perry | 34 min |
| Apr 26, 2:13 PM CDT | Severe Thunderstorm Warning | PAH | Jackson | 17 min |
| Apr 26, 2:30 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Perry | 33 min |
| Apr 26, 2:32 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Marion, Washington | 43 min |
| Apr 26, 2:47 PM CDT | Severe Thunderstorm Warning | PAH | Franklin, Jefferson | 58 min |
| Apr 26, 3:24 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 25 min |
| Apr 26, 3:24 PM CDT | Severe Thunderstorm Warning | PAH | Wayne | 36 min |
| Apr 26, 3:38 PM CDT | Severe Thunderstorm Warning | ILX | Clay | 52 min |
| Apr 26, 3:58 PM CDT | Severe Thunderstorm Warning | ILX | Clay, Richland | 47 min |
| Apr 26, 4:03 PM CDT | Severe Thunderstorm Warning | ILX | Effingham, Jasper | 42 min |
| Apr 26, 4:08 PM CDT | Severe Thunderstorm Warning | ILX | Crawford, Jasper | 52 min |
| Apr 26, 4:35 PM CDT | Severe Thunderstorm Warning | PAH | Cape Girardeau, New Madrid, Scott, Stoddard | 25 min |
| Apr 26, 4:44 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Crawford | 46 min |
| Apr 26, 4:52 PM CDT | Severe Thunderstorm Warning | PAH | Alexander, Jackson, Union | 12 min |
| Apr 26, 5:05 PM CDT | Severe Thunderstorm Warning | ILX | Edgar | 25 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 12:26 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Clinton, Edwards, Franklin, Hamilton and 16 more | 94 min |
| Apr 26, 3:53 PM CDT | Mesoscale Discussion | SPC | Alexander, Clark, Clay, Coles, Crawford, Cumberland and 16 more | 97 min |
| Apr 26, 6:10 PM CDT | Mesoscale Discussion | SPC | Hardin, Massac, Pope | 95 min |
| Apr 25, 7:14 PM CDT | Mesoscale Discussion | SPC | McDonald | 91 min |
| Apr 25, 10:51 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 18 more | 54 min |
| Apr 25, 11:27 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Christian, Dade, Douglas, Greene, Howell and 5 more | 7 hr |
| Apr 26, 1:42 AM CDT | Mesoscale Discussion | SPC | Barry, Christian, Douglas, Greene, Ozark, Stone and 3 more | 2 hr |
| Apr 26, 9:39 AM CDT | Mesoscale Discussion | SPC | Butler, Carter, Dunklin, Howell, New Madrid, Oregon and 3 more | 36 min |
| Apr 26, 5:02 PM CDT | Severe Thunderstorm Watch | SPC | Dunklin, Pemiscot | 6 hr |
Nearby
Severe Thunderstorm Watches in Illinois, 2017Severe Thunderstorm Watches in Missouri, 2017Every severe thunderstorm watch in 2017
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.