Alert archive / Illinois / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 183
The Storm Prediction Center issued this severe thunderstorm watch at May 14, 2020, 6:15 PM CDT for 27 counties in Illinois; 14 counties in Iowa. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- May 14, 2020, 6:15 PM CDT (23:15 UTC)
- Expired
- May 15, 2020, 2:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 41 counties
Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Fulton County, IL, Grundy County, IL, Henderson County, IL, Henry County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Marshall County, IL, Mason County, IL, Mercer County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL
The radar
The Quad Cities radar (KDVN), 42 km from the middle of the area, began a volume at 23:16 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
- 40%
- 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
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 6:33 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk | 57 min |
| May 14, 7:24 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson, Keokuk, Washington | 51 min |
| May 14, 7:39 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Louisa, Washington | 36 min |
| May 14, 7:54 PM CDT | Tornado Warning | ILX | Marshall, Woodford | 51 min |
| May 14, 8:11 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa, Washington | 49 min |
| May 14, 8:36 PM CDT | Severe Thunderstorm Warning | DVN | Mercer, Rock Island | 39 min |
| May 14, 8:59 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 31 min |
| May 14, 9:12 PM CDT | Severe Thunderstorm Warning | DVN | Mercer, Rock Island | 33 min |
| May 14, 9:14 PM CDT | Flash Flood Warning | LOT | Grundy, Kankakee, LaSalle, Livingston | 6 hr |
| May 14, 9:27 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson | 33 min |
| May 14, 9:37 PM CDT | Flash Flood Warning | DVN | Henry, Jefferson, Van Buren | 5 hr |
| May 14, 9:57 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Warren | 48 min |
| May 14, 10:11 PM CDT | Flash Flood Warning | LOT | Kankakee | 5 hr |
| May 14, 10:17 PM CDT | Severe Thunderstorm Warning | LOT | Kankakee | 43 min |
| May 14, 10:20 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Whiteside | 25 min |
| May 14, 10:20 PM CDT | Tornado Warning | DVN | Henry | 14 min |
| May 14, 10:20 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox, Peoria, Stark | 55 min |
| May 14, 10:26 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 49 min |
| May 14, 10:38 PM CDT | Severe Thunderstorm Warning | DVN | Bureau | 52 min |
| May 14, 10:39 PM CDT | Severe Thunderstorm Warning | ILX | Knox, Stark | 35 min |
| May 14, 10:42 PM CDT | Severe Thunderstorm Warning | DVN | Lee, Van Buren | 33 min |
| May 14, 10:57 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, LaSalle, Lee | 48 min |
| May 14, 11:09 PM CDT | Flash Flood Warning | LOT | Cook | 5 hr |
| May 14, 11:26 PM CDT | Tornado Warning | LOT | Lee | 19 min |
| May 14, 11:40 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Kendall, LaSalle | 50 min |
| May 14, 11:53 PM CDT | Tornado Warning | LOT | DeKalb, Kane, Kendall | 22 min |
| May 15, 12:07 AM CDT | Flash Flood Warning | DVN | Henderson, McDonough, Warren | 6 hr |
| May 15, 12:11 AM CDT | Flash Flood Warning | LOT | Cook, DeKalb, DuPage, Kane, Kendall, Lake and 2 more | 4 hr |
| May 15, 12:19 AM CDT | Severe Thunderstorm Warning | LOT | DuPage, Kane, Kendall, Will | 41 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 |
|---|---|---|---|---|
| May 14, 5:19 PM CDT | Mesoscale Discussion | SPC | Bureau, Fulton, Hancock, Henderson, Henry, Knox and 16 more | 116 min |
| May 13, 11:48 PM CDT | Mesoscale Discussion | SPC | Adams, Decatur, Fremont, Mills, Montgomery, Page and 2 more | 2 hr |
| May 14, 3:55 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Jefferson, Lucas and 6 more | 95 min |
| May 14, 4:24 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Clarke, Dallas, Davis, Decatur, Jasper and 13 more | 9 hr |
| May 14, 6:01 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Decatur, Lucas, Ringgold, Wayne | 119 min |
Nearby
Severe Thunderstorm Watches in Illinois, 2020Severe Thunderstorm Watches in Iowa, 2020Every severe thunderstorm watch in 2020
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.