Alert archive / Iowa / Tornado Watches in 2023
Tornado Watch 115
The Storm Prediction Center issued this tornado watch at Apr 4, 2023, 2:48 PM CDT for 24 counties in Illinois; 56 counties in Iowa; 32 counties in Missouri. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 4, 2023, 2:48 PM CDT (19:48 UTC)
- Expired
- Apr 4, 2023, 10:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3.5 in
- Strongest gust expected
- 60 kt
All 112 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Buchanan County, IA, Carroll County, IA, Cass County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones 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, Webster County, IA, Adams County, IL, Bureau County, IL, Carroll County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Knox County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, Mercer County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Howard County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Nodaway County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO
The radar
The Des Moines radar (KDMX), 88 km from the middle of the area, began a volume at 19:52 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
- 80%
- One or more EF2 to EF5 tornadoes
- 60%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 90%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
58 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 2:54 PM CDT | Severe Thunderstorm Warning | EAX | Cooper, Howard | 36 min |
| Apr 4, 3:07 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Monroe | 38 min |
| Apr 4, 3:19 PM CDT | Tornado Warning | EAX | Howard | 16 min |
| Apr 4, 3:42 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone, Monroe | 48 min |
| Apr 4, 4:14 PM CDT | Severe Thunderstorm Warning | LSX | Audrain, Monroe, Pike, Ralls | 35 min |
| Apr 4, 4:20 PM CDT | Severe Thunderstorm Warning | EAX | Holt, Nodaway | 25 min |
| Apr 4, 4:34 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Boone, Dallas, Guthrie, Polk | 41 min |
| Apr 4, 4:38 PM CDT | Severe Thunderstorm Warning | EAX | Macon, Randolph | 37 min |
| Apr 4, 4:44 PM CDT | Severe Thunderstorm Warning | EAX | Nodaway | 31 min |
| Apr 4, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Ringgold, Taylor, Union | 45 min |
| Apr 4, 4:48 PM CDT | Severe Thunderstorm Warning | LSX | Knox, Lewis, Shelby | 42 min |
| Apr 4, 4:52 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Ringgold, Taylor, Union | 38 min |
| Apr 4, 5:19 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 41 min |
| Apr 4, 5:24 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 31 min |
| Apr 4, 5:26 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Boone, Dallas, Greene, Guthrie, Madison and 1 more | 49 min |
| Apr 4, 5:34 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Morgan, Schuyler | 26 min |
| Apr 4, 5:35 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Clarke, Decatur, Madison, Ringgold and 2 more | 40 min |
| Apr 4, 5:36 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 54 min |
| Apr 4, 5:46 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough | 44 min |
| Apr 4, 5:52 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 17 min |
| Apr 4, 5:56 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Fulton, Mason, Schuyler | 25 min |
| Apr 4, 6:02 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Holt, Nodaway | 58 min |
| Apr 4, 6:08 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Grundy, Hamilton, Hardin | 52 min |
| Apr 4, 6:10 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas, Madison, Marion, Polk, Union and 1 more | 50 min |
| Apr 4, 6:25 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, McDonough | 35 min |
| Apr 4, 6:27 PM CDT | Severe Thunderstorm Warning | ILX | Schuyler | 33 min |
| Apr 4, 6:30 PM CDT | Severe Thunderstorm Warning | DMX | Hardin, Jasper, Marshall, Polk, Story | 45 min |
| Apr 4, 6:41 PM CDT | Tornado Warning | DVN | McDonough | 34 min |
| Apr 4, 6:43 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Dallas, Guthrie, Madison and 1 more | 47 min |
| Apr 4, 6:46 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Schuyler | 16 min |
| Apr 4, 6:48 PM CDT | Tornado Warning | DMX | Jasper, Lucas, Mahaska, Marion, Poweshiek, Warren | 42 min |
| Apr 4, 6:49 PM CDT | Severe Thunderstorm Warning | EAX | Nodaway, Worth | 26 min |
| Apr 4, 6:54 PM CDT | Tornado Warning | ILX | Fulton, Schuyler | 36 min |
| Apr 4, 6:54 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Poweshiek, Tama | 51 min |
| Apr 4, 7:00 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Holt, Nodaway | 45 min |
| Apr 4, 7:01 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Ringgold, Taylor, Union | 44 min |
| Apr 4, 7:19 PM CDT | Tornado Warning | ILX | Fulton, Mason | 26 min |
| Apr 4, 7:22 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox, Mason, Peoria, Tazewell | 38 min |
| Apr 4, 7:24 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Poweshiek, Tama | 66 min |
| Apr 4, 7:27 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Boone, Dallas, Madison, Polk, Warren | 48 min |
| Apr 4, 7:33 PM CDT | Tornado Warning | ILX | Fulton, Peoria, Tazewell | 27 min |
| Apr 4, 7:41 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Holt, Nodaway | 49 min |
| Apr 4, 7:42 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Madison, Ringgold, Taylor, Union | 63 min |
| Apr 4, 7:43 PM CDT | Tornado Warning | ILX | Fulton, Mason, Peoria, Tazewell | 32 min |
| Apr 4, 7:54 PM CDT | Tornado Warning | DMX | Poweshiek, Tama | 36 min |
| Apr 4, 7:57 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria, Tazewell, Woodford | 36 min |
| Apr 4, 8:07 PM CDT | Tornado Warning | ILX | Peoria, Tazewell, Woodford | 9 min |
| Apr 4, 8:13 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Story, Warren | 47 min |
| Apr 4, 8:20 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Gentry, Nodaway, Worth | 40 min |
| Apr 4, 8:21 PM CDT | Severe Thunderstorm Warning | DVN | Benton | 39 min |
| Apr 4, 8:48 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Madison, Marion, Polk, Warren | 42 min |
| Apr 4, 8:49 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 26 min |
| Apr 4, 8:55 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Linn | 50 min |
| Apr 4, 8:56 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Jasper, Marshall, Tama | 49 min |
| Apr 4, 9:09 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 36 min |
| Apr 4, 9:33 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 27 min |
| Apr 4, 9:40 PM CDT | Severe Thunderstorm Warning | EAX | Buchanan, Clinton, DeKalb, Platte | 35 min |
| Apr 4, 9:43 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 17 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
- Mesoscale Discussion 456 Severe potential...tornado watch likely
- Mesoscale Discussion 457 Severe potential...watch likely
- Mesoscale Discussion 463 Tornado watch 115
- Mesoscale Discussion 465 Tornado watch 115
- Mesoscale Discussion 467 Severe potential...watch likely
- Mesoscale Discussion 470 Tornado watch 115
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 7.8 hours before the alert went out and 210 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
- 541 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 301 m²/s²
- 0-3 km storm-relative helicity
- 518 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 8:00 AM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Jo Daviess, McHenry, Ogle, Rock Island and 3 more | 3 hr |
| Apr 4, 10:16 AM CDT | Mesoscale Discussion | SPC | Bureau, DeKalb, Henry, Kendall, LaSalle, Lee and 2 more | 89 min |
| Apr 4, 10:36 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more | 4 hr |
| Apr 4, 12:53 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 2 more | 67 min |
| Apr 4, 1:49 PM CDT | Mesoscale Discussion | SPC | Fulton, Hancock, Henderson, Henry, Knox, McDonough and 5 more | 116 min |
| Apr 4, 6:18 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Fulton, Greene, Hancock and 11 more | 87 min |
| Apr 4, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | Jo Daviess, Stephenson | 6 hr |
| Apr 4, 2:54 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 10 more | 3 hr |
| Apr 4, 5:34 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 7 more | 86 min |
| Apr 4, 3:06 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Cedar, Christian, Dade, Greene and 9 more | 114 min |
| Apr 4, 5:41 PM CDT | Mesoscale Discussion | SPC | Atchison, Bates, Buchanan, Cass, Clay, Holt and 3 more | 64 min |
| Apr 4, 6:18 PM CDT | Severe Thunderstorm Watch | SPC | Andrew, Buchanan, Caldwell, Carroll, Cass, Clay and 15 more | 7 hr |
Nearby
Tornado Watches in Iowa, 2023Tornado Watches in Missouri, 2023Tornado Watches in Illinois, 2023Every tornado watch in 2023
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.