public-safety
Severe Thunderstorm Watch issued Aug. 17, 2026 by NWS Aberdeen SD
Severe Thunderstorm Watch issued August 17 at 4:00PM CDT until August 17 at 11:00PM CDT by NWS Aberdeen SD. Areas named: Brown, SD; Buffalo, SD; Campbell, SD; Corson, SD; Dewey, SD; Edmunds, SD; Faulk, SD; Hand, SD; Hughes, SD; Hyde, SD; Jones, SD; Lyman, SD; McPherson, SD; Potter, SD; Spink, SD; Stanley, SD; Sully, SD; Walworth, SD. Whether this alert is still in effect is shown on the page, computed from its stated expiry when you load it.
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NWS Aberdeen SD issued a Severe Thunderstorm Watch on Aug. 17, 2026, 3 p.m. MDT / 4 p.m. CDT, according to the National Weather Service's public alert record.
The alert states an effective time of Aug. 17, 2026, 3 p.m. MDT / 4 p.m. CDT, an onset of Aug. 17, 2026, 3 p.m. MDT / 4 p.m. CDT, and an expiry of Aug. 17, 2026, 10 p.m. MDT / 11 p.m. CDT. South Dakota spans two time zones and this alert may reach both, so each instant is shown in Mountain and then Central time; the office's own published offset is preserved in the machine-readable record.
The alert separately states that the hazard itself ends at Aug. 17, 2026, 10 p.m. MDT / 11 p.m. CDT. That is a different field from the message's expiry above and the two can differ.
Whether this alert is currently in effect is not stated in this text, deliberately: it depends on the time you are reading, so 605Buzz computes it from the expiry above each time the page is loaded rather than storing an answer that would go out of date without anyone noticing. The status shown at the top of this page is the computed one.
The issuing office classified this message as severity "Severe", certainty "Possible" and urgency "Future". Those are the National Weather Service's own categories, reproduced exactly; 605Buzz does not re-rank them or translate them into a scale of its own.
The recommended response type on the message is "Monitor".
The alert names these areas: Brown, SD; Buffalo, SD; Campbell, SD; Corson, SD; Dewey, SD; Edmunds, SD; Faulk, SD; Hand, SD; Hughes, SD; Hyde, SD; Jones, SD; Lyman, SD; McPherson, SD; Potter, SD; Spink, SD; Stanley, SD; Sully, SD; Walworth, SD. The National Weather Service zone codes are SDC013, SDC017, SDC021, SDC031, SDC041, SDC045, SDC049, SDC059, SDC065, SDC069, SDC075, SDC085, SDC089, SDC107, SDC115, SDC117, SDC119 and SDC129.
The full text of the alert as issued on Aug. 17, 2026, 3 p.m. MDT / 4 p.m. CDT, reproduced without changes:
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 591 IN EFFECT UNTIL 11 PM CDT /10 PM MDT/ THIS EVENING FOR THE FOLLOWING AREAS
IN SOUTH DAKOTA THIS WATCH INCLUDES 18 COUNTIES
IN CENTRAL SOUTH DAKOTA
BUFFALO HAND HUGHES HYDE JONES LYMAN STANLEY SULLY
IN NORTH CENTRAL SOUTH DAKOTA
CAMPBELL CORSON DEWEY EDMUNDS FAULK MCPHERSON POTTER WALWORTH
IN NORTHEAST SOUTH DAKOTA
BROWN SPINK
THIS INCLUDES THE CITIES OF ABERDEEN, EUREKA, FAULKTON, FORT PIERRE, FORT THOMPSON, GETTYSBURG, HERREID, HIGHMORE, IPSWICH, ISABEL, KENNEBEC, MCINTOSH, MILLER, MOBRIDGE, MURDO, ONIDA, PIERRE, AND REDFIELD.
The message carries no separate protective-action text.
The National Weather Service superseded this message at Aug. 17, 2026, 9:55 p.m. MDT / 10:55 p.m. CDT with a later one. This article records the message as issued.
This alert is a work of the United States federal government — the National Weather Service, part of NOAA — and is in the public domain; no copyright is claimed on it and none is asserted here. 605Buzz reproduces the record and does not add meteorological judgement. For live conditions and alerts, go to the National Weather Service.
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