Update: Flood warning for the area extended
12:40 a.m. Friday
SIOUX FALLS, S.D. - The National Weather Service has increased the flood warning for the Rock River at Luverne from minor to moderate severity. At 10 p.m. Thursday the stage was 11.8 feet, and flood stage is considered to be 10.0 feet. The river is forecast to crest near 13.0 feet and then fall below flood stage Friday. At stages near 14.0 feet, water reaches the edge of the brick building 150 feet southeast of the water gauge. The warning is set to expire Saturday evening.
10:40 p.m. Thursday
SIOUX FALLS, S.D. - The National Weather Service issued a flood warning for the Rock River at Luverne, set to expire Saturday afternoon. At 9 p.m. Thursday the stage was 10.7 feet. The flood stage is 10.0 feet and minor flooding is occurring. The river will be near 10.8 feet by Friday and fall below flood stage late Friday.
SIOUX FALLS, S.D. - The National Weather Service has extended the flood warning for Cottonwood, Jackson, Murray, Nobles and Pipestone counties in Minnesota, as well as northern Dickinson and northern Osceola counties in Iowa. It will now expire at 7:30 a.m. Friday.
At 4:15 p.m., local law enforcement officials reported flooding across the warned area, with numerous roads being flooded. Some houses and businesses are also affected by flood water. Less than one quarter inch of additional rainfall is expected through this evening, but water levels will continue to remain high throughout the night.
Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, highways and underpasses, farmland and low-lying areas.
Most flood-related deaths occur in automobiles. People should not attempt to cross water-covered bridges, dips or low water crossings. People should not try to cross a flowing stream, even a small one, on foot or in a vehicle. The National Weather Service cautioned people not to underestimate the power of flood waters. Just a few inches of rapidly-flowing water can carry away a vehicle.
SIOUX FALLS, S.D. - The area's flash flood watches have been canceled, but flood warnings below remain in effect. Please continue to stay aware of weather conditions.
SIOUX FALLS, S.D. - Additional flood warnings have been issued.
The flood warning continues for the Des Moines River near Windom. At 10 a.m. Thursday, the stage was 19.4 feet. Flood stage is considered to be 19.0 feet. The river rose above flood stage today, and is expected to crest near 23.0 feet today, falling below flood stage Friday. At stages near 23.0 feet, the higher west bank overflows, flooding agricultural land.
A flood warning continues for the Big Sioux River at Sioux Falls North Cliff from this afternoon until further notice. At 10 a.m. Thursday, the stage was at 13.6 feet. Flood stage is 16.0 feet. The river is expected to rise above flood stage by 5 p.m. today and crest near 21.1 feet by Saturday.
A flood warning has been extended for the Rock River at Rock Rapids, set to expire at 12 p.m. Sunday. At 10 a.m. today the stage was 12.5 feet. Flood stage is 13.0 feet. The river is forecast to rise above the flood stage by 2 p.m. today and crest near 14.8 feet Friday. The river will fall below flood stage by Saturday. At stages near 16.0 feet, the higher banks on the left side of the river and the lower banks on the right side will begin to flood.
11:19 a.m. Original Post
SIOUX FALLS, S.D. - Osceola, O'Brien, Dickinson and Lyon counties are under a flash flood watch until 7 p.m. tonight. Rock County is under a flood warning until 4:30 p.m. today, and the Des Moines River at Jackson and the Rock River at Rock Rapids are expected to flood.
In Rock County, local law enforcement officials reported flooding on Rock County 7 north of Hardwick. Radar continued to show an area of heavy rainfall across the warned area. Additional rainfall through this evening is expected to average between 1 and 2 inches. Runoff from this rainfall will cause flooding to occur in Luverne, Blue Mounds State Park and Hardwick.
In addition, a flood warning has been issued for the Des Moines River at Jackson, until further notice. At 7 a.m. this morning, the river was at 10.6 feet, and flood stage is 12.0 feet. The river rose above flood stage this morning and will crest near 15.6 feet by Friday. At stages near 17.0 feet, the lower levees in Jackson are overtopped, and parks and ballfields would be flooded.
A flood warning has been issued for the Rock River at Rock Rapids, from this afternoon to late Saturday night. At 7 a.m. Thursday the stage was 11.2 feet. The flood stage is 13.0 feet. Minor flooding is forecast. The river is projected to rise above flood stage by 4 p.m. today and crest near 15.2 feet by Friday. The river will fall below flood stage by Saturday. At stages near 16.0 feet, the higher banks on the left side of the river, and the lower banks on the right side will begin flooding.
A strong low pressure system will move east across the area today. Additional moderate to heavy rain can be expected until this system passes. The rain will decrease from the southwest this afternoon and evening. Widespread additional rainfall of 1 to 2 inches are expected in southwest Minnesota and northwest Iowa.
Heavier additional rainfall amounts of 2 to 4 inches are possible. Combined with saturated and already flooding conditions from rainfall Wednesday and Wednesday night, these rainfall amounts will create a continued threat of flash flooding in the area.