occurs if upper-level wind shear is too strong. The storm can redevelop if the upper-level shear abates. If a tropical wave is moving quickly, or is organized enough, it can have winds of a strength in excess of tropical storm force, but it is not considered a tropical storm unless it has a closed low-level circulation. An example of this was Hurricane Claudette in 2003, where the original wave had winds of before developing a closed low-level circulation. East Pacific It has been suggested that some eastern Pacific Ocean tropical cyclones are formed out of tropical easterly waves that originate in North Africa as well. After developing into a tropical cyclone, some of those systems can then reach the Central Pacific Ocean, such as Hurricane Lane in 2018. During the summer months, tropical waves can extend northward as far as the desert of the southwestern United States, producing spells of intensified shower activity embedded within the prevailing monsoon regime. Screaming eagle waves A screaming eagle is a tropical wave with a convective pattern that loosely resembles the head of an eagle. This phenomenon is caused by shearing from either westerly winds aloft or strong easterly winds at the surface. These systems are typically located within 25 degrees latitude of the equator. Rain showers and surface winds gusting to are associated with these waves. They move across the ocean at a rate of . Strong thunderstorm activity can be associated with the features when located east of a tropical upper tropospheric trough. The term was first publicly seen in an Air Force satellite interpretation handbook written by Hank Brandli in 1976. In 1969, Brandli discovered that a storm of this type threatened the original splashdown site for Apollo 11. See also Hovmöller diagram Tropical cyclone Tropical cyclogenesis Cape Verde hurricane References External links Tropical Waves Presentation African Easterly Wave Variability and Its Relationship to Atlantic Tropical Cyclone Activity Tropical cyclone meteorology