Floodwaters fill the Yolo Bypass of northern California in the center of this Harmonized Landsat and Sentinel-2 (HLS) image from February 18, 2024. Swipe the bar to the left to reveal the Observational Products for End-Users from Remote Sensing Analysis (OPERA) Dynamic Surface Water Extent layer highlighting the floodwaters in blue and light blue. Clouds are in grey.
The Yolo Bypass was built as a part of the Sacramento River Flood Control Project to protect Sacramento and California's Central Valley from flooding. The Yolo Bypass floodplain is flooded for about 70% to 80% most winters, though more so during atmospheric river events. Explore the Yolo Bypass in Worldview.
The HLS project provides 30-meter resolution, true-color surface reflectance imagery from the Operational Land Imager (OLI) and OLI-2 instruments aboard the joint NASA/USGS Landsat 8 and Landsat 9 satellites and the MultiSpectral Instrument (MSI) aboard the ESA (European Space Agency) Sentinel-2A and -2B satellites. Data processing—including atmospheric correction, cloud and cloud-shadow masking, spatial co-registration and common gridding, illumination and view angle normalization, and spectral bandpass adjustment—makes the imagery consistent and comparable across the instruments. OPERA uses HLS as the input dataset to produce products like the Dynamic Surface Water Extent.
Visit Worldview to visualize near real-time imagery from NASA's EOSDIS, and check out more Worldview weekly images in our archive.
Dataset: doi:10.5067/HLS/HLSS30.002
