https://phys.org/news/2018-07-nasa-ill-defined-tropical-depression-15w.html

At 11 a.m. EDT (1500 UTC) the Joint Typhoon Warning Center or JTWC noted that Tropical Depression 15W had maximum sustained winds near 30 knots (34.5 mph/55.5 kph). It was located near 16.7 degrees north latitude and 137.0 degrees east longitude, about 416 nautical miles north-northwest of Ulithi. 15W has tracked northward at 6 knots (7 mph/11 kph).

The JTWC forecast calls for 15W to move to the northeast and strengthen over the open waters of the Northwestern Pacific Ocean. JTWC is forecasting 15W will move just north of Iwo To Island, Japan on July 27.

                                                            
                                    
                                    Explore further: