Gusty winds and heavy rainfall were expected this weekend for the island nation. Helene will pass close to or perhaps over the southernmost Cabo Verde Islands Saturday night and Sunday. Credit: Cape Hatteras National Seashore Facebook. The environment over the next few days was expected to support some further intensification. The herd of wild horse that roams the Outer Banks made it safely through the storm. In the Eastern Atlantic the disturbance east of the Cabo Verde Islands has strengthened into Tropical Storm Helene, the eighth named storm of the 2018 Atlantic Hurricane season. Large swells were already expected to hit the British island territory in the north Atlantic Ocean Saturday. Though weakened to a tropical storm, Florence was expected to regain hurricane strength as it neared Bermuda. "Due to these conditions, Superintendent David Hallac is strongly urging all beach visitors to stay out of the Atlantic Ocean until dangerous conditions subside." "Large swells and high threats of rip currents associated with Tropical Storm Florence will produce life-threatening ocean conditions along Cape Hatteras National Seashore (Seashore) beaches," the statement said. Position data, provided as latitude/longitude/ellipsoid height, is referenced to the North American Datum of 1983 (NAD83(2011)).The National Parks of Eastern North Carolina issued a statement Saturday, warning beach visitors about the "dangerous ocean conditions." Available activities at the Cape Hatteras National Seashore include surf fishing, boating, sunbathing, swimming, hiking, camping, and nature study. The precise time of each image capture (flash event) was recorded, and the corresponding aircraft position was computed in post-processing from the aircraft navigation GNSS data precise image positions can then be determined by accounting for the lever arm offsets between the aircraft GNSS antenna and the camera lens. Data were collected in shore-parallel lines, flying at approximately 50 meters per second and capturing true color imagery at 1 Hertz, resulting in image footprints with approximately 75-80% endlap, 60-70% sidelap, and 5.3-centimeter ground sample distance (GSD). Low-altitude (300 m above ground level) digital aerial imagery was acquired from a manned, fixed-wing aircraft using a Sony A7R 36 Megapixel digital camera, along with precise aircraft navigation Global Navigation Satellite System (GNSS) data. The observations along the coastline cover an area approximately 275 kilometers long and 300 to 700 meters (m) wide and encompass both highly developed towns as well as natural undeveloped areas, including the federal lands of Cape Lookout National Seashore and Cape Hatteras National Seashore. These products are valuable for measuring topographic change, and for understanding coastal vulnerability and response to disturbance events.Ī nadir (vertical) aerial imagery survey was conducted from Cape Fear to Duck, North Carolina on October 6-8, 2018, in response to Hurricane Florence. Geological Survey (USGS) Remote Sensing Coastal Change (RSCC) project collects aerial imagery along coastal swaths, in response to storm events, with optimized endlap/sidelap and precise position information to create high-resolution orthomosaics, three-dimensional (3D) point clouds, and digital elevation/surface models (DEMs/DSMs) using Structure-from-Motion (SfM) photogrammetry methods.
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