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You are here: Home / * PRESS / Emergency Response / Record-breaking Atlantic hurricane season draws to an end

Record-breaking Atlantic hurricane season draws to an end

November 26, 2020 By Editor

Improved forecasts, extensive preparedness helped protect lives and property

The extremely active 2020 Atlantic hurricane season is drawing to a close with a record-breaking 30 named storms and 12 landfalling storms in the continental United States. While the official hurricane season concludes on November 30, tropical storms may continue to develop past that day.

NOAA’s seasonal hurricane outlooks accurately predicted a high likelihood of an above-normal season with a strong possibility of it being extremely active. In total, the 2020 season produced 30 named storms (top winds of 39 mph or greater), of which 13 became hurricanes (top winds of 74 mph or greater), including six major hurricanes (top winds of 111 mph or greater). This is the most storms on record, surpassing the 28 from 2005, and the second-highest number of hurricanes on record.

“Throughout this relentless hurricane season, NOAA worked around-the-clock to provide critical data and reliable forecasts to our Nation’s communities in the path of devastating storms,” said U.S. Secretary of Commerce Wilbur Ross. “The services provided by NOAA, alongside our emergency management partners, undoubtedly helped save many lives and protect property.”

The list of 30 named storms that have occurred during the 2020 Atlantic Hurricane Season as of November 24, 2020. The 2020 season surpassed 2005 as the busiest on record. The season officially ends November 30.
The list of 30 named storms that have occurred during the 2020 Atlantic Hurricane Season as of November 24, 2020. The 2020 season surpassed 2005 as the busiest on record. The season officially ends November 30. (NOAA)
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The 2020 season got off to an early and rapid pace with a record nine named storms from May through July, and then quickly exhausted the 21-name Atlantic list when Tropical Storm Wilfred formed on September 18. For only the second time in history, the Greek alphabet was used for the remainder of the season, extending through the 9th name in the list, Iota.

“The 2020 Atlantic hurricane season ramped up quickly and broke records across the board,” said Neil Jacobs, Ph.D, acting NOAA administrator. “Our investments in research, forecast models, and computer technology allowed forecasters at the National Weather Service, and its National Hurricane Center, to issue forecasts with increasing accuracy, resulting in the advanced lead time needed to ensure that decision makers and communities were ready and responsive.”

Animated satellite imagery of the named storms that occurred during the 2020 Atlantic Hurricane Season (May 13 through November 18). For optimal viewing, please choose 1080p and full screen in your video settings. (Credit: NOAA Satellites)

This is the fifth consecutive year with an above-normal Atlantic hurricane season, with 18 above-normal seasons out of the past 26. This increased hurricane activity is attributed to the warm phase of the Atlantic Multi-Decadal Oscillation (AMO) — which began in 1995 — and has favored more, stronger, and longer-lasting storms since that time. Such active eras for Atlantic hurricanes have historically lasted about 25 to 40 years. An average season has 12 named storms, six hurricanes, and three major hurricanes.

“As we correctly predicted, an interrelated set of atmospheric and oceanic conditions linked to the warm AMO were again present this year. These included warmer-than-average Atlantic sea surface temperatures and a stronger west African monsoon, along with much weaker vertical wind shear and wind patterns coming off of Africa that were more favorable for storm development. These conditions, combined with La Nina, helped make this record-breaking, extremely active hurricane season possible,” said Gerry Bell, Ph.D, lead seasonal hurricane forecaster at NOAA’s Climate Prediction Center.

This infographic highlights key facts and statistics from the 2020 Atlantic Hurricane Season (at the time of publishing on November 24). The Atlantic hurricane season officially ends November 30, but storm activity in the tropics can sometimes continue beyond that date.
This infographic highlights key facts and statistics from the 2020 Atlantic Hurricane Season (at the time of publishing on November 24). The Atlantic hurricane season officially ends November 30, but storm activity in the tropics can sometimes continue beyond that date. (NOAA National Weather Service)
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This historic hurricane season saw record water levels in several locations, including the Gulf Coast where Hurricane Sally brought the highest observed water levels since Hurricane Katrina in 2005. NOAA’s National Ocean Service stations recorded this data using the Coastal Inundation Dashboard, a tool to observe real-time water levels during a storm.

Scientists at NOAA’s Atlantic Oceanographic and Meteorological Laboratory and the Satellite Data and Information Service were able to get wave height information into the hands of forecasters using new instrumentation like the Ka-band Interferometric Altimeter. This vital oceanic data allowed forecasters to help mariners avoid dangerous situations at sea.

Additionally, three hurricanes — Isaias, Laura, and Sally — passed within range of NOAA’s hurricane ocean gliders this year, capturing invaluable ocean data below the storms while hurricane hunter planes captured atmospheric data above.

Capturing atmospheric data this season was no small feat, as forecasters and researchers relied on the heroic efforts of NOAA and U.S. Air Force Reserve Hurricane Hunters to provide invaluable data during this record-setting season.

Preparedness for the season ahead

This season may officially end on Nov. 30, but it is still possible for additional storms to develop. Stay vigilant and make sure your family is Weather-Ready. The 2021 hurricane season will officially begin on June 1 and NOAA’s Climate Prediction Center will issue its initial seasonal outlook in May.

Filed Under: Emergency Response, Environment, Top Text Lead Story Tagged With: hurricane, NOAA






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About Editor

Glenn is a geographer and a GIS professional with over 20 years experience in the industry. He's the co-founder of GISuser and several other technology web publications.

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