how long did it take for hurricane irma to form
Hurricane Irma Irma developed on August 30, 2017 near the Cape Verde Islands, from a tropical wave that had moved off the west African coast three days prior.[2][3][4] Under favorable conditions, Irma rapidly intensified shortly after formation, becoming a Category 2 hurricane on the Saffir–Simpson scale within a mere 24 hours. Irma became a Category 3 hurricane (and therefore a major hurricane) shortly afterward; however, the intensity fluctuated between Categories 2 and 3 for the next several days due to a series of eyewall replacement cycles. On September 4, Irma resumed intensifying, becoming a Category 5 hurricane by early the next day. On September 6, Irma reached its peak intensity, with 185 mph (295 km/h) winds and a minimum pressure of 914 hPa (27.0 inHg), making it the second most intense tropical cyclone worldwide so far in 2017, behind only Hurricane Maria, and the strongest worldwide in 2017 in terms of wind speed.
Andrea Gail All six of the crew were lost at sea.
Time Earth is split up into a number of time zones. Most time zones are exactly one hour apart, and by convention compute their local time as an offset from GMT. For example, time zones at sea are based on GMT. In many locations (but not at sea) these offsets vary twice yearly due to daylight saving time transitions.
Hurricane Sandy After Sandy exited Cuba, the structure became disorganized,[22] and it turned to the north-northwest over the Bahamas.[23] By October 27, Sandy was no longer fully tropical, and despite strong shear, it maintained convection due to influence from an approaching trough; the same trough turned the hurricane to the northeast.[24] After briefly weakening to a tropical storm,[25] Sandy re-intensified into a hurricane,[26] and on October 28 an eye began redeveloping.[27] The storm moved around an upper-level low over the eastern United States and also to the southwest of a ridge over Atlantic Canada, turning it to the northwest.[28] Sandy briefly re-intensified to Category 2 intensity on the morning of October 29, around which time it had a wind diameter of over 1,150 miles (1,850 km), and a central pressure of 943 mb, which set records for many cities across the Northeastern United States for the lowest pressures ever observed.[29] The convection diminished while the hurricane accelerated toward the New Jersey coast,[30] and the hurricane was no longer tropical by 2100 UTC on October 29.[31] About 2 1/2 hours later, Sandy made landfall near Brigantine, New Jersey,[32] with winds of 80 mph (130 km/h).[3] During the next four days, Sandy's remnants drifted northward and then northeastward over Ontario, before merging with another low pressure area over Eastern Canada on November 2.[3][33]