Atlantic hurricane season

Atlantic hurricane season
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Name	Atlantic hurricane season
Basin	Atlantic Ocean
First storm formed	Varies annually
Last storm dissipated	Varies annually
Strongest storm name	Varies
Strongest storm pressure	Varies
Strongest storm winds	Varies
Total storms	Varies
Fatalities	Varies
Damages	Varies

Atlantic hurricane season The Atlantic hurricane season is the annual period when tropical cyclones develop in the Atlantic basin, with principal activity between June and November. It is central to operational forecasting by institutions such as the National Hurricane Center, Met Office, NOAA, World Meteorological Organization, and European Centre for Medium-Range Weather Forecasts. The season influences policy, insurance, and infrastructure planning across regions including United States, Caribbean, Mexico, Central America, and Canada.

Overview and climatology

Atlantic season climatology describes temporal and spatial patterns influenced by features like the Intertropical Convergence Zone, Gulf Stream, Sargasso Sea, Azores High, and Sahara Desert. Peak activity typically occurs around early September near the climatological maximum associated with warm sea surface temperatures monitored by NOAA Climate Prediction Center and NASA. Multi-decadal oscillations such as the Atlantic Multidecadal Oscillation and teleconnections like the El Niño–Southern Oscillation modulate frequency and intensity, affecting hurricane genesis over the Main Development Region and along the Western Caribbean Sea. Paleotempestology and historical datasets from HURDAT2 and archives held by National Oceanic and Atmospheric Administration and International Best Track Archive for Climate Stewardship inform baseline climatology.

Tropical cyclone formation and meteorology

Tropical cyclogenesis in the Atlantic requires conditions including elevated sea surface temperatures recorded by NOAA satellites and GOES instruments, adequate mid-level moisture measured by instruments from NASA, low vertical wind shear influenced by tropical upper tropospheric troughs and the African Easterly Jet, and preexisting disturbances such as African easterly waves tracked by NOAA Hurricane Hunters and reconnaissance flights by the US Air Force Reserve Hurricane Hunters. Dynamic and thermodynamic processes involve latent heat release, eyewall replacement cycles observed in storms like Hurricane Wilma and Hurricane Maria, and rapid intensification episodes documented for Hurricane Patricia (Pacific analog) and Atlantic analogs such as Hurricane Michael and Hurricane Dorian. Interaction with mid-latitude features such as the Jet Stream and cold fronts can lead to extratropical transition affecting regions like Bermuda and Newfoundland.

Seasonal forecasting and monitoring

Seasonal outlooks are issued by agencies including NOAA Climate Prediction Center, United Kingdom Met Office, Colorado State University Tropical Meteorology Project (CSU), University of Miami researchers, and private firms such as Tropical Storm Risk. Monitoring relies on platforms like Geostationary Operational Environmental Satellites (GOES), Jason altimeters, Scatterometers aboard MetOp, and airborne reconnaissance by NOAA Hurricane Hunters and US Air Force Reserve. Numerical models used include GFS, ECMWF, HWRF, and statistical schemes developed at CSU and NOAA, with data assimilation from AMSU and ASCAT improving forecasts. Warning coordination involves national services such as National Hurricane Center and regional mechanisms like the Caribbean Disaster Emergency Management Agency.

Impacts and preparedness

Impacts span storm surge, inland flooding, wind damage, and economic disruption affecting Florida, Texas, Puerto Rico, Cuba, Bahamas, Dominican Republic, Haiti, Mexico, Jamaica, and Venezuela. Preparedness and response frameworks deploy agencies including Federal Emergency Management Agency, Red Cross, WHO, Pan American Health Organization, Centers for Disease Control and Prevention, and national disaster offices. Structural resilience measures reference standards from American Society of Civil Engineers, insurance instruments guided by Reinsurance Association of America and Insurance Information Institute, and mitigation funding via institutions like the World Bank and Inter-American Development Bank. Evacuation studies draw on case analyses from Hurricane Katrina, Hurricane Sandy, Hurricane Maria, and Hurricane Irma to refine sheltering, logistics, and supply chain continuity plans.

Records and notable seasons

Record storms and seasons are chronicled in archives including HURDAT2 and retrospectives by NOAA and NHC. Notable events include the 1900 Galveston hurricane, Hurricane Katrina (2005), 2005 Atlantic hurricane season, 2017 Atlantic hurricane season, 2012 Atlantic hurricane season, 2019 Atlantic hurricane season, and 2020 Atlantic hurricane season which set records for storm counts and impacts. Extreme-intensity examples include Hurricane Allen (1980), Hurricane Gilbert (1988), Hurricane Wilma (2005), Hurricane Dorian (2019), and Hurricane Michael (2018). Longitudinal records highlight landfalling impacts on Louisiana, New Orleans, Galveston, Miami, Havana, and island nations across the Caribbean Sea.

Historical trends and climate change effects

Research from institutions such as IPCC, NOAA, NASA, WMO, University of Exeter, Princeton University, and Columbia University indicates trends in hurricane intensity, rapid intensification frequency, and rainfall rates consistent with warming sea surface temperatures and higher atmospheric moisture per the Clausius–Clapeyron relation. Studies examine changing storm tracks and basin-scale shifts related to the Atlantic Multidecadal Oscillation and anthropogenic forcing documented in assessments by IPCC AR5 and IPCC AR6. Attribution science using model experiments from CMIP6 and observational analyses by NOAA National Centers for Environmental Information explores links between greenhouse gas concentrations, aerosol forcings, and metrics such as Accumulated Cyclone Energy affecting risk assessments used by World Bank and national planners.

Category:Atlantic hurricanes