The depression moved to the west in response to an area of high pressure that was situated to its north. It is estimated that Tropical Depression Twelve formed at around 18:00 UTC, after further organization occurred, while located north of the Turks and Caicos Islands.
By early on November 8, showers and convection became more concentrated around the area of low pressure, and there was indications that the disturbance was producing gale-force winds in squally bands that were short-lived. On November 7, convection increased as it passed to the northeast of Hispaniola however, surface pressures were still relatively high. The new disturbance then turned towards Hispaniola and Puerto Rico, at which point the National Hurricane Center began to monitor the disturbance for possible tropical cyclogenesis. By November 5, however, as the wave approached the Lesser Antilles, a low-level vorticity split from the wave and traveled to the west-northwest, while the tropical wave headed towards Central America. Passing through the eastern Atlantic in unfavourable conditions, the disorganized disturbance failed to organize any further. At this point in the season, tropical waves are uncommon due to increasingly unfavourable conditions, making the origins of Kate "rare, but not unprecedented" as described by the National Hurricane Center (NHC) in its post-season report on the storm. On October 30, a poorly-defined tropical wave moved off the coast of Africa with little thunderstorm activity. It also caused minor surf along the East Coast of the United States.Įxtratropical cyclone / Remnant low / Tropical disturbance / Monsoon depression Kate caused minor impacts in the Bahamas, other than gusty winds and some rain showers as it passed just to the east on November 9. Shortly afterwards, it transitioned into an extratropical cyclone. On November 11, it intensified into a hurricane while simultaneously peaking in intensity. Kate moved northwest around an area of high pressure, gradually strengthening. The next day it developed into a tropical depression shortly afterwards it developed into Tropical Storm Kate. Once it neared the northern coast of Hispaniola on November 7, it began to become somewhat better organized.
Unfavorable conditions prevented it from significantly organizing as it traversed the Atlantic. The eleventh and final named storm and hurricane of the 2015 Atlantic hurricane season, Kate formed out of a disorganized tropical wave that had moved off the coast of Africa on October 30. Hurricane Kate was the latest Atlantic hurricane to form in the Atlantic basin since Epsilon in 2005, as well as one of the northernmost November hurricanes on record. Part of the 2015 Atlantic hurricane season Lesser Antilles ( Martinique), Puerto Rico, Hispaniola, The Bahamas, Europe Hurricane Kate at peak intensity to the northeast of Bermuda on November 11
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