Alert archive / Iowa / Tornado Watches in 2022
Tornado Watch 536
The Storm Prediction Center issued this tornado watch at Sep 18, 2022, 6:11 PM CDT for 7 counties in Illinois; 41 counties in Iowa; 12 counties in Missouri. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 18, 2022, 6:11 PM CDT (23:11 UTC)
- Expired
- Sep 19, 2022, 12:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 60 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Benton County, IA, Boone County, IA, Cedar County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Guthrie County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Hancock County, IL, Henderson County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Adair County, MO, Clark County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Marion County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO
The radar
The Des Moines radar (KDMX), 78 km from the middle of the area, began a volume at 23:11 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
- 20%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 60%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 70%
- 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 |
|---|---|---|---|---|
| Sep 18, 7:03 PM CDT | Tornado Warning | DMX | Davis | 29 min |
| Sep 18, 7:19 PM CDT | Tornado Warning | DVN | Van Buren | 41 min |
| Sep 18, 7:55 PM CDT | Severe Thunderstorm Warning | DVN | Johnson | 35 min |
| Sep 18, 8:08 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Linn | 36 min |
| Sep 18, 8:20 PM CDT | Severe Thunderstorm Warning | EAX | Schuyler | 25 min |
| Sep 18, 8:30 PM CDT | Severe Thunderstorm Warning | DVN | Van Buren | 45 min |
| Sep 18, 8:34 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson | 26 min |
| Sep 18, 8:45 PM CDT | Severe Thunderstorm Warning | EAX | Schuyler | 15 min |
| Sep 18, 8:48 PM CDT | Tornado Warning | DVN | Scotland | 57 min |
| Sep 18, 8:56 PM CDT | Severe Thunderstorm Warning | EAX | Adair, Putnam, Schuyler | 49 min |
| Sep 18, 8:58 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine, Scott | 32 min |
| Sep 18, 9:08 PM CDT | Severe Thunderstorm Warning | LSX | Knox | 37 min |
| Sep 18, 9:15 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island | 45 min |
| Sep 18, 9:29 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 15 min |
| Sep 18, 9:30 PM CDT | Severe Thunderstorm Warning | DVN | Clark, Scotland | 19 min |
| Sep 18, 9:30 PM CDT | Severe Thunderstorm Warning | LSX | Lewis | 45 min |
| Sep 18, 9:37 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 53 min |
| Sep 18, 9:47 PM CDT | Tornado Warning | DVN | Hancock | 28 min |
| Sep 18, 9:52 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 53 min |
| Sep 18, 9:56 PM CDT | Tornado Warning | LSX | Adams | 36 min |
| Sep 18, 10:01 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 32 min |
| Sep 18, 10:15 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis | 19 min |
| Sep 18, 10:32 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 58 min |
| Sep 18, 10:38 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 52 min |
| Sep 18, 10:55 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Pike | 50 min |
| Sep 18, 11:02 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 32 min |
| Sep 18, 11:32 PM CDT | Severe Thunderstorm Warning | DVN | Hancock | 19 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 |
|---|---|---|---|---|
| Sep 18, 3:56 PM CDT | Mesoscale Discussion | SPC | Hancock, Henderson | 2 hr |
| Sep 17, 7:16 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 27 more | 7 hr |
| Sep 17, 10:34 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Clarke, Davis, Decatur and 15 more | 116 min |
Nearby
Tornado Watches in Iowa, 2022Tornado Watches in Missouri, 2022Tornado Watches in Illinois, 2022Every tornado watch in 2022
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.