public-safety
Flood Advisory issued Aug. 16, 2026 by NWS Rapid City SD
Flood Advisory issued August 16 at 5:21PM MDT until August 16 at 8:15PM MDT by NWS Rapid City SD. Areas named: Pennington, 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 Rapid City SD issued a Flood Advisory on Aug. 16, 2026, 5:21 p.m. MDT / 6:21 p.m. CDT, according to the National Weather Service's public alert record.
The alert states an effective time of Aug. 16, 2026, 5:21 p.m. MDT / 6:21 p.m. CDT, an onset of Aug. 16, 2026, 5:21 p.m. MDT / 6:21 p.m. CDT, and an expiry of Aug. 16, 2026, 8:15 p.m. MDT / 9:15 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. 16, 2026, 8:15 p.m. MDT / 9:15 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so 605Buzz computes it from the expiry above each time the page is loaded rather than storing an answer that would go out of date without anyone noticing.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 "Minor", certainty "Likely" and urgency "Expected". 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 "Avoid".
The alert names these areas: Pennington, SD. The National Weather Service zone codes are SDC103.
The issuing office's own summary line, as written on Aug. 16, 2026, 5:21 p.m. MDT / 6:21 p.m. CDT:
FLOOD ADVISORY IN EFFECT UNTIL 815 PM MDT THIS EVENING
The full text of the alert as issued on Aug. 16, 2026, 5:21 p.m. MDT / 6:21 p.m. CDT, reproduced without changes:
* WHAT...Urban area and small stream flooding caused by excessive rainfall is expected.
* WHERE...Western Pennington County in west central South Dakota...
* WHEN...Until 815 PM MDT.
* IMPACTS...Water over roadways.
* ADDITIONAL DETAILS...
- At 521 PM MDT, Doppler radar indicated heavy rain due to thunderstorms. This will cause urban and small stream flooding. Overflowing poor drainage areas will cause minor flooding in the advisory area. Between 1 and 2 inches of rain have fallen.
- Additional rainfall amounts up to 1 inch are expected over the area. This additional rain will result in minor flooding.
- Some locations that will experience flooding include... Rapid City and Rapid Valley.
- http://www.weather.gov/safety/flood
The protective-action text the issuing office attached, reproduced without changes:
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
The National Weather Service superseded this message at Aug. 16, 2026, 8:15 p.m. MDT / 9:15 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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