Severe Thunderstorm Warning — Dewey County, South Dakota
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Current Status
⛈️ Active: Severe Thunderstorm Warning
Severe Thunderstorm Warning issued August 17 at 6:30PM CDT until August 17 at 6:45PM CDT by NWS Aberdeen SD
At 530 PM MDT, a severe thunderstorm was located over Firesteel, or 8 miles west of Timber Lake, moving southeast at 45 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. This severe thunderstorm will be near... Firesteel around 530 PM MDT. Little Moreau Rec Area and Timber Lake around 540 PM MDT.
Effective August 17, 2026 at 7:30 PM ET · Expires August 17, 2026 at 7:45 PM ET
Event Details
Event Type
Severe Thunderstorm Warning
Severity
severe
Issued By
NWS Aberdeen SD
Expires
August 17, 2026 at 7:45 PM ET
Last Checked
2 minutes ago
What To Do
📋 Official NWS Guidance
Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds and large hail.
Also In Effect For
This same Severe Thunderstorm Warning also covers:
Other Active Alerts in South Dakota
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Get Severe Thunderstorm Warning Alerts for Dewey County
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Frequently Asked Questions
What does a Severe Thunderstorm Warning mean for Dewey County, South Dakota?
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Is this Severe Thunderstorm Warning currently active?
Yes — this alert is active as of our last check (2 minutes ago). It's set to expire August 17, 2026 at 7:45 PM ET.
How do I get notified about Severe Thunderstorm Warning alerts for Dewey County?
Download StormCast free on Google Play and set Dewey County, South Dakota as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Severe Thunderstorm Warning is also in effect for Corson County.