extratropical
Adjective
Meaning
Beyond or outside of the tropics.
Source: Webster's dictionarySynonyms
Phrases with the word
Examples
Bertha HAS to weaken and begin to become extratropical...famous last words.
21st century Tristan da Cunha on 6 February 2013, as seen from the International Space Station On 23 May 2001, the islands were hit by an extratropical cyclone that generated winds up to convert.
A tropical cyclone can become extratropical as it moves toward higher latitudes if its energy source changes from heat released by condensation to differences in temperature between air masses.
Despite unanimous agreement on the sign of the trends, substantial disagreement exists among available estimates as to the rate of temperature changes, particularly outside the NH extratropical troposphere, which has been well sampled by radiosondes.
Later in their life cycle, extratropical cyclones occlude as the cold air mass undercuts the warmer air and become cold core systems.
Storms that were extratropical when they impacted the region include Hurricane Tanya in 1995, Tropical Storm Ana in 2003 and Tropical Storm Grace in 2009.