In a recent assessment of Iowa's dams and reservoirs based on the latest dataset collected on March 30, 2025, there are observable variations in water storage levels when compared to historical averages. Clear Lake at Clear Lake is currently at a gage height of 4 feet, which is slightly below its average of 4.51 feet. Similarly, Black Hawk Lake at Lake View, Lake Panorama at Panora, and Spirit Lake near Orleans are marginally below their average heights by 0.13, 0.43, and 0.03 feet respectively. Meanwhile, West Okoboji Lake at Lakeside Lab near Milford is notably lower, with a current gage height of 3 feet against an average of 4.17 feet. Corydon Lake, however, is experiencing significantly higher than average streamflow, reporting at 5 cubic feet per second compared to its average of 1.96 cubic feet per second. At Rathbun Lake near Rathbun, the gage height is 903 feet, trailing the average by 3.54 feet.

The deviations in storage and flow levels at these reservoirs could indicate abnormal conditions for this time of year. The minor deficits in gage heights at Clear Lake, Black Hawk Lake, Lake Panorama, and Spirit Lake may be attributed to lower-than-expected precipitation or higher water usage. The more pronounced drop at West Okoboji Lake suggests potential concerns that may include increased evaporation rates or water diversions. The elevated streamflow at Corydon Lake could be the result of recent weather events, such as heavy rainfalls or rapid snowmelt, impacting the watershed feeding the lake. The shortfall at Rathbun Lake might be due to a combination of factors, including upstream water retention or consumption. The observed conditions call for a closer analysis of regional hydrological patterns, including snowpack levels, river flows, and precipitation trends, to fully understand the causes and implement management strategies to address any potential water resource concerns. Cross-referencing with other data sources, such as local meteorological reports and regional river basin authorities, would further clarify the situation and guide appropriate responses.