Iowa Severe Severe Thunderstorm Warning | Effective 09/04/2026 12:40

Headline: 
Severe Thunderstorm Warning issued September 4 at 2:40PM CDT until September 4 at 3:15PM CDT by NWS La Crosse WI
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
September 4, 2026 - 12:40pm
Expires: 
September 4, 2026 - 1:15pm
Description: 
At 239 PM CDT, a severe thunderstorm was located near Waukon, moving east at 25 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. This severe storm will be near... Harpers Ferry around 300 PM CDT. Other locations impacted by this severe thunderstorm include County Roads A 52 And X 52, County Roads A 52 And W 60, State Road 9 And County X 20, Waterville, State Road 76 And County X 16, Elon, and Maud.
Instruction: 
For your protection move to an interior room on the lowest floor of a building.
Area Description: 
Allamakee, IA
Forcast Office: 
NWS La Crosse WI
Sender: 
w-nws.webmaster@noaa.gov