National Weather Service United States Department of Commerce


Only days after the widespread tornado outbreak on March 31, 2023, multiple rounds of severe thunderstorms occurred across eastern Iowa, northwest Illinois and far northeast Missouri during Thursday, April 4 into early Friday, April 5, 2023.

Round 1 of thunderstorms began during the early morning hours of April 4 as a supercell thunderstorm developed across southeast Iowa. This storm quickly intensified and became severe as it approached and moved over the Quad Cities, producing very large hail from golf ball to tea cup size. The largest hailstones were measured in and around Davenport, where tea cup size hail was measured at the North Park Mall. Despite the apparent elevated nature of the storms and a very stable low level atmosphere, a strong surge of winds was produced south of the hail core over the Illinois side of the Quad Cities metro, with the Quad City Airport ASOS measuring a wind gust near 90 MPH. Extensive damage occurred from Rock Island to Colona IL to buildings, trees and power poles, with some structures seeing ripped-off roofs. An NWS Storm Survey Team determined a few brief tornadoes did occur as well.

Round 2 of severe thunderstorms arrived during the late afternoon of April 4, with all modes of severe weather seen. Most notably, am EF1 tornado developed near Industry IL, and tracked northeast through McDonough County into Fulton County. 

Round 3 of severe thunderstorms arrived during the late overnight hours into the morning of April 5th, as a strong cold front moved across the area. A line of storms became severe as they reached the Mississippi River, producing wind gusts to 60 MPH and large hail, and even one brief tornado. Ping pong ball sized hail was observed near Nora, IL.

Surrounding Office Event Summaries

Supercell Time Step Image

30-min radar snapshots of the initial supercell formation near Ottumwa, IL around 7 A.M. to its passage near Chicago at 1:30 P.M.

Radar reflectivity of Supercell over the QC metro



Photo Photo Photo
Marion, IA
(Rebecca Kopelman)
Davenport, IA
(Maureen Murray)
Muscatine, IA
(Brenda Papendorf)
Photo Photo

Hail damage photos to a vehicle a little over one half mile north of the NorthPark Mall in Davenport, IA. (Kyle Bales)
Photo Photo Photo
Colona, IL Tornado Damage
(NWS Survey)
Colona, IL Tornado Damage
(NWS Survey)
Colona, IL Tornado Damage
(NWS Survey)



Storm Centric Radar Loop
April 4, 2023 7 A.M. - 1:30 P.M. storm-centric radar loop on the long-lived supercell storm from near Ottumwa, IA to Chicago, IL.
Radar Image
Interactive Radar Loop - Courtesy IEM


SPC Severe Weather Event Page April 4, 2023

Environment Environment Environment
Figure 1: SPC 1630z Day 1 Outlook Figure 2: SPC 1630z Day 1 Tornado Probabilities Figure 3: SPC 1630z Day 1 Hail Probabilities
Environment Environment Environment
Figure 2: SPC 1630z Day 1 Wind Probabilities Figure 5: Mesoscale Discussion #453 Figure 6: Mesoscale Discussion #454
Environment Sounding Environment
Figure 7: Tornado Watch #115 Area Figure 8: 12Z DVN Sounding Figure 9: 21Z DVN Sounding
Environment Image  
Figure 9: 15Z Surface Analysis Figure 10: Series of Surface Weather Maps  



Research & More


NWS Quad Cities Research & Presentations on April 4, 2023:


nws logo

Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.

NWS Quad Cities Past Events Page:

nws logo