Alert archive / Iowa / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 147, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at May 15, 2026, 11:00 PM CDT for Delaware County, Iowa. It was in force for 41 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 15, 2026, 11:00 PM CDT (04:00 UTC)
- Expired
- May 15, 2026, 11:41 PM CDT
- In force
- 41 min
- Issued by
- NWS Quad Cities, IA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Delaware County, IA
The radar
The Quad Cities radar (KDVN), 116 km from the middle of the area, began a volume at 04:01 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 15, 10:33 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 4.0 hours before the alert went out and 119 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
- 392 J/kg
- Mixed-layer CIN
- -247 J/kg
- Mixed-layer LCL
- 1683 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 10:27 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 48 min |
| May 16, 2:43 AM CDT | Special Weather Statement | DVN | Jefferson, Van Buren | 47 min |
| May 16, 3:17 AM CDT | Special Weather Statement | DVN | Des Moines, Henry, Louisa | 43 min |
| May 16, 3:49 AM CDT | Special Weather Statement | DVN | Henderson, Mercer, Warren | 41 min |
| May 16, 4:17 AM CDT | Special Weather Statement | DVN | Henry | 43 min |
| May 16, 4:43 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry | 47 min |
| May 16, 5:04 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 41 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 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.