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NWS Aberdeen SDFA.W 0019July 30, 2026

Flood Warning: Lyman, SD

The National Weather Service office in Aberdeen issued a flood warning for Lyman in South Dakota, which was in force until 10:00 a.m. local time on July 31. It was the 19th areal flood warning the NWS office in Aberdeen issued in 2026. South Dakota had 22 flood warnings in July 2026, against 13 in an average July of 2008-2025 (South Dakota's flood warnings by year).

ExpiredWarning

Issued9:59 p.m. CDT, July 30, 2026
In force9:59 p.m. CDT, July 30, 2026
Expired10:00 a.m. CDT, July 31, 2026

In force for 12 hours; it has expired. The agency may have replaced it with a new notice.

The notice

Issued by
National Weather Service, Aberdeen SD
Area
Lyman
State
South Dakota
Level
Warning
Issued
9:59 p.m. CDT, July 30, 2026
Expires
10:00 a.m. CDT, July 31, 2026
CAP severity, certainty, urgency
Severe, Likely, Expected
VTEC event
KABR FA.W 0019
Official source
National Weather Service: the notice at its source

Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.

The notice as issued

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...East Central Lyman County in central South Dakota... * WHEN...Until 1000 AM CDT Friday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 958 PM CDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. Between 3 and 4 inches of rain have fallen. - Some locations that will experience flooding include... Oacoma, Dude Ranch and Lake Francis Case. - http://www.weather.gov/safety/flood

What the agency told people to do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.

Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.