2010 Hurricane Track Summary
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The 2010 Atlantic hurricane season was the period in 2010 during which tropical cyclones formed in the Atlantic Ocean. The season officially started on June 1 and ended on November 30, dates which conventionally delimit the period of each year when most tropical systems form in the basin.

Due to a moderate La Niña, the 2010 Atlantic hurricane season was well above average, with the most number of named storms since 2005. The 2010 Atlantic season ties with the 1995 Atlantic hurricane season and the 1887 Atlantic hurricane season for the third largest number of named storms, with 19, and it also ties with the 1969 Atlantic hurricane season for the second largest number of hurricanes, with 12. In addition, the activity in the north Atlantic in 2010 exceeded the activity in the northwest Pacific Typhoon season. The only other known time this event happened was in 2005.

The season began with Hurricane Alex, a Category 2 storm on the Saffir–Simpson Hurricane Scale, which struck the Yucatán Peninsula as a tropical storm and northeastern Mexico south of the Texas border at peak intensity. Following Alex, a series of relatively weak systems occurred into the month of July and early August. In the latter part of August and September, the season became much more active with the formation of eleven named storms in about 40 days, six of which were Cape Verde-type storms. Four of those Cape Verde storms (Danielle, Earl, Igor and Julia) each reached Category 4 intensity and a fifth in the Caribbean (Karl) also became a major hurricane. Danielle and Earl were back-to-back major hurricanes, followed by several weak tropical storms, and then another series of three consecutive major hurricanes. From August 21 to September 26, there was not a single full day without at least one tropical cyclone active for a total of 36 days, starting with the formation of Tropical Depression Six (which became Hurricane Danielle) and ending with the dissipation of Tropical Depression Lisa, the longest period since the 2005 Atlantic hurricane season. In the month of September, eight named storms formed, which is the highest ever recorded, tying with the 2002 and 2007 seasons.

In addition, there were three occasions when three tropical cyclones were active simultaneously, with the first set being Danielle, Earl, and Fiona co-existing on August 30 – August 31. The second occasion was when Earl, Fiona, and Gaston co-existed on September 1 – September 2. The third and most notable was when Igor, Julia, and Karl were active September 14 – September 18. During a brief period, on September 15, Igor and Julia were simultaneously Category 4 hurricanes, a very rare occurrence and the first such since 1926. Both were still hurricanes when Karl was upgraded to a hurricane on September 16, the first time since the 1998 season that there were at least three simultaneous hurricanes in the North Atlantic.