Alert archive / Illinois / Tornado Watches in 2019
Tornado Watch 665
The Storm Prediction Center issued this tornado watch at Sep 27, 2019, 4:00 PM CDT for 29 counties in Illinois; 12 counties in Iowa; 6 counties in Missouri. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2019, 4:00 PM CDT (21:00 UTC)
- Expired
- Sep 27, 2019, 11:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 47 counties
Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Johnson County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Adams County, IL, Brown County, IL, Bureau County, IL, Cass County, IL, DeWitt County, IL, Ford County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, LaSalle County, IL, Livingston County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL, Clark County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Scotland County, MO, Shelby County, MO
The radar
The Quad Cities radar (KDVN), 63 km from the middle of the area, began a volume at 21:03 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
- 50%
- One or more EF2 to EF5 tornadoes
- 40%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 50%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
46 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 4:05 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Tazewell, Woodford | 25 min |
| Sep 27, 5:10 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson | 26 min |
| Sep 27, 5:34 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Warren | 41 min |
| Sep 27, 5:37 PM CDT | Severe Thunderstorm Warning | DVN | Bureau | 53 min |
| Sep 27, 5:48 PM CDT | Severe Thunderstorm Warning | DVN | Clark, Scotland | 42 min |
| Sep 27, 5:51 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 39 min |
| Sep 27, 6:07 PM CDT | Severe Thunderstorm Warning | DVN | Bureau | 23 min |
| Sep 27, 6:12 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 33 min |
| Sep 27, 6:12 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 48 min |
| Sep 27, 6:15 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 45 min |
| Sep 27, 6:19 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox | 41 min |
| Sep 27, 6:20 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Mercer, Warren | 40 min |
| Sep 27, 6:30 PM CDT | Tornado Warning | DVN | Hancock | 25 min |
| Sep 27, 6:30 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 45 min |
| Sep 27, 6:48 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 42 min |
| Sep 27, 6:52 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis | 53 min |
| Sep 27, 6:53 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 52 min |
| Sep 27, 6:55 PM CDT | Severe Thunderstorm Warning | ILX | Knox, Peoria, Stark | 50 min |
| Sep 27, 7:00 PM CDT | Tornado Warning | LSX | Knox, Lewis | 45 min |
| Sep 27, 7:01 PM CDT | Tornado Warning | ILX | Knox, Peoria | 29 min |
| Sep 27, 7:03 PM CDT | Flash Flood Warning | DVN | Bureau, Henry, Putnam | 6 hr |
| Sep 27, 7:06 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 39 min |
| Sep 27, 7:09 PM CDT | Severe Thunderstorm Warning | ILX | Knox, Stark | 51 min |
| Sep 27, 7:16 PM CDT | Flash Flood Warning | ILX | Knox, Marshall, Peoria, Stark | 6 hr |
| Sep 27, 7:24 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough, Warren | 51 min |
| Sep 27, 7:34 PM CDT | Tornado Warning | LSX | Adams | 41 min |
| Sep 27, 7:37 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Peoria, Woodford | 38 min |
| Sep 27, 7:37 PM CDT | Flash Flood Warning | LOT | Grundy, Kendall, LaSalle | 6 hr |
| Sep 27, 7:53 PM CDT | Severe Thunderstorm Warning | ILX | Fulton | 52 min |
| Sep 27, 7:58 PM CDT | Flash Flood Warning | ILX | Fulton, Knox | 6 hr |
| Sep 27, 8:00 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle | 30 min |
| Sep 27, 8:07 PM CDT | Tornado Warning | LSX | Adams | 53 min |
| Sep 27, 8:11 PM CDT | Severe Thunderstorm Warning | ILX | Marshall | 19 min |
| Sep 27, 8:14 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 46 min |
| Sep 27, 8:19 PM CDT | Flash Flood Warning | DVN | Hancock, McDonough | 6 hr |
| Sep 27, 8:26 PM CDT | Tornado Warning | ILX | Fulton, Peoria, Tazewell | 19 min |
| Sep 27, 8:36 PM CDT | Flash Flood Warning | ILX | Peoria, Tazewell, Woodford | 6 hr |
| Sep 27, 8:39 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell, Woodford | 36 min |
| Sep 27, 8:41 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 16 min |
| Sep 27, 8:45 PM CDT | Severe Thunderstorm Warning | ILX | Schuyler | 32 min |
| Sep 27, 8:51 PM CDT | Severe Thunderstorm Warning | LSX | Lewis | 54 min |
| Sep 27, 8:53 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria, Tazewell | 37 min |
| Sep 27, 8:59 PM CDT | Flash Flood Warning | LSX | Knox, Lewis | 8 hr |
| Sep 27, 9:02 PM CDT | Flash Flood Warning | LOT | Grundy, LaSalle, Livingston | 6 hr |
| Sep 27, 9:04 PM CDT | Flash Flood Warning | DVN | Henderson, Warren | 6 hr |
| Sep 27, 10:14 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 46 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
Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 65 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
- 1100 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 346 m²/s²
- 0-3 km storm-relative helicity
- 321 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 3:01 PM CDT | Mesoscale Discussion | SPC | Bureau, Cass, Fulton, Hancock, Henderson, Henry and 18 more | 119 min |
| Sep 27, 3:49 PM CDT | Severe Thunderstorm Watch | SPC | Carroll, Jo Daviess, Stephenson | 7 hr |
| Sep 27, 6:21 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Cass, DeKalb, DeWitt and 30 more | 114 min |
| Sep 27, 5:37 PM CDT | Mesoscale Discussion | SPC | Appanoose, Wayne | 2 hr |
| Sep 27, 6:16 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Andrew, Buchanan, Caldwell, Carroll, Cass and 25 more | 8 hr |
Nearby
Tornado Watches in Illinois, 2019Tornado Watches in Iowa, 2019Tornado Watches in Missouri, 2019Every tornado watch in 2019
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.