The 2015 Hurricane Season in the North Atlantic: An Analysis of Environmental Conditions
The 2015 North Atlantic hurricane season was particularly inactive, this inactivity occurring in the presence of a near-record El Niño, the strongest since 1997. When analyzing large-scale environmental conditions utilizing NCEP/NCAR Reanalysis 2, we show that the Caribbean was particularly inactive under very strong wind shear and positive Omega conditions. While conditions generally were not conducive in the North Atlantic, there were conducive conditions present at specific times and specific locations, and these tended to be when and where we saw tropical cyclone activity. Vorticity in particular showed large intraseasonal variability with the location of the positive vorticity relating to storms such as Ana in May, Claudette in July, multiple storms in August and September, and Joaquin in October. We assess how the active and inactive periods observed during the 2015 hurricane season were related to this month to month atmospheric variability.
KeywordsHurricanes North Atlantic 2015 season
We thank the reviewers of this paper.
- Collins JM, Roache DR (2010) The inactive 2009 hurricane season in the North Atlantic basin: an analysis of environmental conditions. Natl Weather Dig 34:117–128Google Scholar
- Elsner JB, Kara AB (1999) Hurricanes of the North Atlantic. Oxford University Press, New York 488ppGoogle Scholar
- Gray WM (1979) Hurricanes: their formation, structure and likely role in the tropical circulation. In: Shaw DB (ed) Meteorology over tropical oceans, royal meteorological. Society Press, Bracknell, pp 155–218Google Scholar
- Gray WM, Sheaffer JD (1991) In: Glantz MH, Katz RW, Nicholls N (eds) El Niño and QBO influences on tropical cyclone activity. Teleconnections linking worldwide climate anomalies: scientific basis and societal impact. Cambridge University Press, Cambridge, UKGoogle Scholar
- Lupo AR, Latham TK, Magill T, Clark JV, Melick CJ, Market PS (2008) The interannual variability of hurricane activity in the Atlantic and East Pacific regions. Natl Weather Dig 32(2):119–133Google Scholar
- Namias J (1954) Long range factors affecting the genesis and paths of tropical cyclones, Proc UNESCO Symp on Typhoons. UNESCO, Tokyo, pp 213–219Google Scholar
- Palmén E (1948) On the formation and structure of tropical hurricanes. Geophysica 3:26–38Google Scholar