Alert archive / Illinois / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 145, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at May 4, 2026, 8:22 PM CDT for 4 counties in Illinois. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 4, 2026, 8:22 PM CDT (01:22 UTC)
- Expired
- May 4, 2026, 9:16 PM CDT
- In force
- 54 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Hancock County, IL, Henderson County, IL, McDonough County, IL, Warren County, IL
The radar
The Quad Cities radar (KDVN), 111 km from the middle of the area, began a volume at 01:24 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.
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.4 hours before the alert went out and 114 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
- 2740 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 4, 6:53 PM CDT, 1 hour 29 minutes earlier.
Area forecast discussion, May 4, 6:53 PM CDT, 1 hour 29 minutes before
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</html>Hazardous weather outlook, May 4, 2:39 PM CDT, 5 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 239 PM CDT Mon May 4 2026 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-051945- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 239 PM CDT Mon May 4 2026 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...THIS AFTERNOON AND TONIGHT Winds gusting up to 35 mph combined with warm temperatures and low humidity levels will create an elevated fire risk today for some. Avoid or delay any outdoor burning. The Storm Prediction Center has a marginal, level 1 out of 5, risk for severe storms this afternoon and evening for much of the area. Our far south was upgraded to a slight, level 2 out of 5, risk for severe weather. The overall time frame for strong to severe storms is 4 to 10 PM this afternoon and evening. Low level moisture is limited so storm initiation may not occur until 4 to 6 PM. Once storms develop, hail and damaging winds will be the primary risks. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible late this afternoon and evening.
In the hours before
Special weather statement, May 4, 4:46 PM CDT, 3 hours 36 minutes before
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</html>Special weather statement, May 4, 4:56 PM CDT, 3 hours 26 minutes before
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</html>Special weather statement, May 4, 6:22 PM CDT, 2 hours before
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</html>Local storm report, May 4, 6:23 PM CDT, 1 hour 59 minutes before
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</html>Local storm report, May 4, 6:38 PM CDT, 1 hour 44 minutes before
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</html>The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 7:10 PM CDT | Special Weather Statement | DVN | Lee, Van Buren | 65 min |
| May 4, 7:36 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 54 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2026Every severe thunderstorm warning in 2026
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.