NWS Sioux Falls SDFW.W 0007April 12, 2026
Red Flag Warning: Lyon, Sioux, Plymouth and 6 more, IA and MN
The National Weather Service office in Sioux Falls issued a red flag warning for Lyon, Sioux, Plymouth and 6 more in Iowa, Minnesota, Nebraska, South Dakota, which was in force until 7:00 p.m. local time on April 12. It was the 7th red flag warning the NWS office in Sioux Falls issued in 2026. Iowa had 5 red flag warnings in April 2026, against 5 in an average April of 2008-2025 (Iowa's red flag warnings by year).
ExpiredWarning
In force for 6.3 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Sioux Falls SD
- Area
- Lyon, Sioux, Plymouth and 6 more
- State
- Iowa
- Level
- Warning
- Issued
- 12:44 p.m. CDT, April 12, 2026
- Expires
- 7:00 p.m. CDT, April 12, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KFSD FW.W 0007
- 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
The National Weather Service in Sioux Falls has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 7 PM CDT this evening. * AFFECTED AREA...In Iowa, Lyon, Sioux and Plymouth. In Minnesota, Pipestone and Rock. In Nebraska, Dakota. In South Dakota, Miner, Lake and Moody. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
What the agency told people to do
A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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.