Alert archive / Iowa / Severe Thunderstorm Warnings in 2025
Severe Thunderstorm Warning 27, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 18, 2025, 1:11 AM CDT for 4 counties in Iowa. It was in force for 21 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
- Apr 18, 2025, 1:11 AM CDT (06:11 UTC)
- Expired
- Apr 18, 2025, 1:32 AM CDT
- In force
- 21 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Johnson County, IA, Louisa County, IA, Muscatine County, IA, Washington County, IA
The radar
The Quad Cities radar (KDVN), 73 km from the middle of the area, began a volume at 06:10 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, 6.2 hours before the alert went out and 79 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
- 1462 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 584 m²/s²
- 0-3 km storm-relative helicity
- 935 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Apr 17, 6:55 PM CDT, 6 hours 16 minutes earlier.
Area forecast discussion, Apr 17, 6:55 PM CDT, 6 hours 16 minutes before
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</html>Hazardous weather outlook, Apr 17, 4:59 AM CDT, 20 hours 12 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 459 AM CDT Thu Apr 17 2025 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-181100- 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- 459 AM CDT Thu Apr 17 2025 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...TODAY AND TONIGHT There will be a chance for isolated to scattered thunderstorms this morning with small hail and lightning the main threats. Later tonight scattered strong to severe storms will be possible especially across eastern Iowa. Large hail will be the primary threat, with damaging wind bursts a secondary concern. There is a Slight Risk(Level 2 out of 5) for generally the west half of the Outlook Area tonight, with a Marginal Risk(Level 1 out of 5) across the rest of the area. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY There is a Slight Risk for severe storms Friday afternoon and evening generally across Illinois as a cold front sweeps through the region. A Marginal Risk extends further to the west across far eastern Iowa and northeast Missouri. All modes of severe weather will be possible if these storms manage to form in the local area. There may be another chance for thunderstorms on Sunday. Any risk of severe weather and heavy rain will be better determined in the coming days. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed later tonight especially across Iowa. There is also a chance that spotter activation will be needed Friday afternoon and evening especially across Illinois. GENERAL STORM MOTION OF THE DAY: Northeast at 40 to 50 MPH 12
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 11:44 PM CDT | Special Weather Statement | DVN | Iowa | 46 min |
| Apr 18, 1:01 AM CDT | Special Weather Statement | DVN | Washington | 29 min |
| Apr 18, 7:40 AM CDT | Special Weather Statement | DVN | Jo Daviess, Stephenson | 50 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2025Every severe thunderstorm warning in 2025
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.