ATLANTIC HISTORICAL TROPICAL CYCLONE TRACKS
Atlantic Historical Tropical Cyclone Tracks: What 170-Plus Years of Storm Data Show
From Cape Verde easterly waves to Hurricane Ian’s run through Southwest Florida, the Atlantic’s storm archive reveals clear seasonal patterns — and a real scientific debate over how much of the long-term trend is climate versus better satellites
Every hurricane season, forecasters and coastal residents alike lean on a mental map of where storms tend to form, how they tend to move, and when the real danger window opens. That map isn’t guesswork — it comes from one of the longest-running weather datasets in existence: the International Best Track Archive for Climate Stewardship, or IBTrACS, maintained by NOAA’s National Centers for Environmental Information. For the Atlantic basin, the archive’s backbone is HURDAT2, the National Hurricane Center’s official database of every tracked tropical cyclone dating back to 1851.
A Record Stretching Back to 1851 — But Not All Equally Reliable
IBTrACS merges “best track” data — position, wind speed, central pressure, and storm size — from weather agencies around the world into a single global dataset covering seven ocean basins. For the Atlantic, that record now spans more than 170 years, but NHC is candid that the earlier decades are far less complete than recent ones.
Before aircraft reconnaissance began flying into storms in 1944, “some storms were missed and many intensities are too low,” according to the technical documentation behind NHC’s HURDAT2 database. Ship reports and landfall accounts were the only way most storms were ever recorded, meaning anything that stayed out at sea and missed shipping lanes could vanish from history entirely. The aircraft-reconnaissance era, from 1944 through the mid-1960s, improved intensity estimates considerably, and NOAA’s Hurricane Research Division has conducted formal reanalyses of those decades to correct the record.
The biggest leap came with routine satellite coverage of the Atlantic starting in the mid-to-late 1960s, which for the first time gave forecasters consistent eyes on storms that never came near land or a reconnaissance flight. Even so, NHC notes that “new technologies affect the best tracks in a non-trivial way” even in recent decades, as better satellites, scatterometers, and intensity-estimation techniques continue to refine the record. A standing NHC “Best Track Change Committee” works through the archive decade by decade, reanalyzing and correcting storms as far back as the 1850s.
The Season Has a Shape, Not Just a Start and End Date
The Atlantic hurricane season officially runs June 1 through November 30, but activity isn’t spread evenly across those six months. NHC’s long-term climatology shows a clear arc: early-season storms (June and July) tend to form close to home, spinning up in the warm, shallow waters of the Gulf of Mexico and the Caribbean.
By August, the action shifts toward the Main Development Region — a corridor of warm water stretching from the west coast of Africa toward Central America and the Gulf Coast, generally between about 10 and 20 degrees north latitude, where sea-surface temperatures of roughly 80°F or warmer combine with enough spin from the Earth’s rotation to organize a storm. This is where “Cape Verde hurricanes” are born: storms that organize into tropical systems within roughly 600 miles of Africa’s Cape Verde Islands and strengthen into hurricanes well before reaching the Caribbean. NOAA’s Atlantic Oceanographic and Meteorological Laboratory notes these Cape Verde storms average only about two per year, but the easterly waves that spawn them are responsible for roughly 85 percent of the Atlantic’s intense hurricanes.
The season’s climatological peak lands on September 10, and activity tapers through October and November as Main Development Region waters cool and wind shear increases, pushing what late-season development remains back toward the western Caribbean and Gulf — closer to Florida’s doorstep.
Why Some Storms Curve Out to Sea — and Some Don’t
Most Atlantic tropical systems are steered westward by the southern edge of the subtropical ridge — the semi-permanent zone of high pressure also known as the Bermuda High or Azores High. As a storm tracks west, it’s essentially riding along the bottom edge of that ridge. When it reaches the ridge’s western flank, or finds a weakness in it, the storm typically “recurves” — turning north, then northeast, often carried out to sea well before threatening the U.S. coast.
When the ridge stays unusually strong and extends farther west or south than normal, a storm can run out of room to make that turn. Instead of recurving safely offshore, it gets steered under the ridge and driven into the Gulf of Mexico or deep into the Caribbean — the pattern behind some of the coast’s worst direct hits.
Storms That Rewrote the Record Book
A handful of storms stand out in the historical archive not just for their strength, but for what their tracks reveal about the basin’s extremes:
The 1935 Labor Day Hurricane remains a benchmark. It slammed into the Florida Keys near Long Key at Category 5 intensity with a central pressure of 892 millibars — a reading that stood as the lowest ever recorded at landfall in the Western Hemisphere for decades. Hurricane Camille followed in 1969, coming ashore near Waveland, Mississippi, at 900 millibars and producing a 24.6-foot storm surge at Pass Christian that stood as a U.S. record for years.
Hurricane Andrew in 1992 showed how a compact, intense storm could still be catastrophic: it crossed South Florida in roughly four hours with an unusually small, powerful wind field, becoming — at the time — the costliest hurricane ever to strike Florida. The 2005 season produced two Category 5 storms whose tracks tell very different stories: Katrina weakened to a Category 1 landfall in South Florida before re-strengthening over the Gulf’s warm loop current and slamming Louisiana at Category 3, while Wilma underwent a record-setting pressure drop of 97 millibars in 24 hours over the northwest Caribbean before crossing directly over Southwest Florida.
More recently, Hurricane Michael in 2018 became the first Category 5 to strike the contiguous U.S. since Andrew, tearing through the Florida Panhandle near Mexico Beach in about four hours. Hurricane Dorian in 2019 did the opposite — its steering currents collapsed entirely, leaving it stalled over Grand Bahama and Abaco at Category 5 strength for roughly 22 hours, among the longest such stalls on record anywhere in the basin.
And for Southwest Florida, the storm that needs no introduction is Hurricane Ian. The 2022 hurricane made landfall near Cayo Costa and Punta Gorda at 150 mph, driving a 10-to-15-foot storm surge directly into the Fort Myers, Cape Coral and Naples area and going on to become the costliest hurricane in Florida history, with damage estimated near $112 billion.
Are There Really More Storms Now — Or Just Better Eyes on Them?
One of the more contentious questions in hurricane science is how much of the apparent rise in recorded Atlantic storm counts over the historical record reflects an actual increase in storm activity, versus simply catching storms today that would have gone completely unrecorded a century ago. It’s a real, ongoing debate among credentialed researchers, not a fringe argument.
NOAA hurricane specialist Chris Landsea has argued the pre-satellite record likely missed two to three storms per year in earlier decades, pointing to the fact that a higher share of storms found in the historical record made landfall before 1965 than after — consistent with storms over the open ocean going unnoticed before satellites existed. Other researchers, including Michael Mann, have used independent, climate-variable-based statistical reconstructions and arrived at a smaller estimated undercount, while also questioning whether that landfall-percentage metric is as reliable an indicator as Landsea’s analysis assumes.
NOAA’s own Geophysical Fluid Dynamics Laboratory has staked out a clear institutional position: it describes the long-term rise in raw storm counts since the late 1800s as “largely an artifact of improved observing capabilities,” and after statistically adjusting for storms likely missed in the pre-satellite era, finds only a small, not statistically significant trend remains — a conclusion that holds, GFDL says, even when the analysis is restricted to the satellite era alone. A more recent synthesis by NOAA’s Tom Knutson similarly found no statistically significant increase in U.S. landfalling hurricanes since 1901, though he notes the more reliable, recent decades of data do show rising rates of rapid intensification — while cautioning there’s no formal scientific attribution yet for how much of that reflects natural multidecadal cycles, a warming influence, or both.
Not everyone reads the data the same way. A 2022 study led by MIT’s Kerry Emanuel took a different approach entirely, using climate models rather than the historical observational record to reconstruct 150 years of hurricane activity, and concluded the North Atlantic’s rise in hurricane and major-hurricane frequency looks like a real, regionally specific signal — one not mirrored by a similar global increase in tropical cyclones elsewhere. Both camps agree the earliest decades of the record undercounted storms to some degree; where they part ways is how large that undercount was, and how much of a residual, real trend is left once you account for it.
Exploring the Record Yourself
For readers who want to see these patterns firsthand rather than take a reporter’s word for it, Orbis Weather’s historical tropical cyclone tracks tool draws directly on the same NOAA IBTrACS archive described above, letting you browse the North Atlantic basin’s full period of record by storm category — from tropical depressions up through Category 5 hurricanes, plus storms in their extratropical stage.
This article draws on NOAA’s IBTrACS and HURDAT2 documentation, National Hurricane Center climatology, and published hurricane-science research to explain long-established patterns in the Atlantic storm record. Where scientists disagree — as they do on how much of the historical storm-count trend reflects real climate change versus improved detection — this report presents multiple credentialed perspectives rather than favoring one side.
Sources: NOAA National Centers for Environmental Information (IBTrACS), NOAA National Hurricane Center (HURDAT2 technical documentation, Tropical Cyclone Climatology), NOAA Atlantic Oceanographic and Meteorological Laboratory (Hurricane FAQ), NOAA Geophysical Fluid Dynamics Laboratory (“Global Warming and Hurricanes”), Chris Landsea (NOAA/AGU Eos, 2007), Michael Mann et al. (Geophysical Research Letters, 2007), Tom Knutson (NOAA, “Tropical Cyclone Trends 1878–2022”), National Science Foundation / MIT (Kerry Emanuel et al., 2022), RealClimate.org, Wikipedia (storm-specific historical details)
PACIFIC HISTORICAL TROPICAL CYCLONE TRACKS
Pacific Historical Tropical Cyclone Tracks: The Basin That Produces More Storms Than the Atlantic — and Almost Never Hits Land
From Hurricane Patricia’s record-shattering intensity to the cold water that has spared California all but once in recorded history, the Eastern and Central Pacific’s storm archive tells a very different story than the Atlantic’s
Southwest Florida’s hurricane anxiety is built around the Atlantic and Gulf, but the busiest hurricane basin relative to its size isn’t either of those — it’s the Eastern Pacific, off Mexico’s Pacific coast. This is the companion piece to our look at the Atlantic’s historical storm archive, this time covering the Eastern Pacific (EPAC) and Central Pacific (CPAC) basins that NOAA tracks through the same International Best Track Archive for Climate Stewardship (IBTrACS) database.
Two Basins, Two Offices, One Dividing Line
The Eastern Pacific basin stretches from the coastlines of Mexico and Central America west to 140°W, and forecast responsibility for it belongs to the National Hurricane Center in Miami — the same office that handles the Atlantic. Cross 140°W heading farther west, though, and you’re in the Central Pacific basin, which runs to the International Date Line and falls under the Central Pacific Hurricane Center, co-located with the National Weather Service office in Honolulu. Keep going west past the Date Line and you’ve left the Western Hemisphere’s hurricane terminology behind entirely — those systems become typhoons, tracked by an entirely different set of agencies.
NOAA’s official Eastern/Central Pacific best-track record, HURDAT2, begins in 1949 — nearly a century after the Atlantic’s 1851 starting point. The gap isn’t arbitrary. NHC’s own technical documentation is candid that the pre-satellite Eastern Pacific record is even less complete than the Atlantic’s equivalent early years, since this is a remote ocean that saw far less ship traffic than the Atlantic’s established shipping lanes. The dataset as it exists today wasn’t even compiled until 1976, when NHC assembled the 1949–1975 seasons from U.S. Navy reconnaissance flights and scattered ship reports onto magnetic tape. NHC’s documentation states that wind estimates from 1949 through 1969 were only “crudely estimated” — commonly rounded to bucketed values like 25, 45, or 75 knots — and that records for the basin’s most intense storms remain “particularly uncertain” prior to 1988. Continuous satellite coverage, which transformed the reliability of the record the same way it did in the Atlantic, didn’t arrive until 1971.
Busier Than the Atlantic, Storm for Storm
It’s a genuine, sourced fact, not exaggeration: the Eastern Pacific produces more storms per unit of ocean area than any other basin on Earth. Averaged over 1971–2005, the basin saw roughly 15 to 16 named storms a year, with about 9 becoming hurricanes and 4 to 5 reaching major-hurricane strength — busier by every measure than the Atlantic’s comparable average of about 14 named storms, 7 hurricanes and 3 major hurricanes over the same stretch. The Western Pacific still produces more storms in raw numbers, but it also covers a far larger stretch of ocean; pound for pound, the waters off Mexico are the most storm-prolific in the world.
The Eastern Pacific season officially runs May 15 through November 30 — two and a half weeks longer than the Atlantic’s — with a climatological peak in late August that’s noticeably less sharply defined than the Atlantic’s September 10 spike. The Central Pacific season lines up with the Atlantic’s June 1 start but shares that same broad August–September peak.
Why the Storms Rarely Come Ashore
If the Eastern Pacific is so active, why doesn’t Mexico’s Pacific coast see the kind of relentless hurricane pressure Florida does? The basin’s geography does almost all of the work. Storms typically form off the coast of southern Mexico and Central America and are pushed westward by the trade winds — out to sea, rather than back toward land the way many Atlantic storms curve toward the Southeast U.S. coast. By the time a storm’s track does eventually recurve, it’s often thousands of miles from anywhere.
That westward drift runs the storms straight into a wall of cold water. The California Current keeps sea-surface temperatures off the U.S. West Coast in the 60s and low 70s Fahrenheit — well short of the roughly 80-degree threshold a hurricane needs to survive. Any storm that manages to turn toward California has to cross a long stretch of ocean simply too cold to sustain it, and it withers to a tropical storm or remnant low well before landfall. That’s why California has only one confirmed hurricane strike in its entire recorded history: an 1858 storm that came ashore near San Diego at an estimated Category 1 strength, reconstructed by NOAA researchers Michael Chenoweth and Chris Landsea in a 2004 peer-reviewed study since no wind instruments of the era actually measured it. It remains the sole known exception in more than 165 years of record-keeping.
Hawaii, sitting well out in the Central Pacific, gets a similar reprieve, though for a slightly different combination of reasons: climate scientists point to a high-pressure ridge typically parked northeast of the islands that steers storms around them, paired with cooler waters to the north and east that sap a storm’s strength before it arrives. The result is that a direct hit on the islands is rare enough that meteorologists in 2014 noted a hypothetical direct strike on the Big Island by Tropical Storm Iselle would have been the first since record-keeping began in 1950 — and possibly the first since a storm that may have hit in 1872.
Storms That Rewrote the Record Book
Despite rarely reaching land, this basin holds some of the most extreme numbers in tropical meteorology anywhere in the world. Hurricane Patricia, in October 2015, is the benchmark: it intensified by 120 mph in just 24 hours — the fastest rate of strengthening NHC had ever recorded at the time — and peaked at 215 mph sustained winds with a central pressure of 872 millibars, making it the most intense tropical cyclone ever recorded in the Western Hemisphere. It came ashore near Cuixmala, Mexico, weakened to a still-formidable Category 4, and caused only 13 deaths thanks to the sparsely populated stretch of coast it struck. Patricia broke a record set just 18 years earlier by Hurricane Linda in 1997, which peaked at 185 mph and 902 millibars and briefly threatened a turn toward Southern California before recurving safely out to sea — though its moisture still triggered flooding and mudslides in the state.
Hurricane John, in 1994, set a different kind of record: it lasted 31 days, a mark that stood as the longest-lived tropical cyclone on Earth until 2023, and it still holds the record for the longest track ever traveled by a tropical cyclone — more than 8,100 miles. John’s path is a geographical oddity all its own: it formed off Mexico, moved into the Central Pacific, crossed the International Date Line into the Western Pacific (becoming Typhoon John in the process), looped back on itself, and crossed the Date Line again before finally dissipating.
Hawaii’s worst-case scenario played out in 1992, when Hurricane Iniki made a direct hit on Kauai’s south shore as a Category 4 with 140 mph winds — still the most powerful hurricane ever to strike Hawaii and the costliest natural disaster in state history at $3.1 billion, arriving just 18 days after Hurricane Andrew devastated South Florida. Hawaii came close again in 2018 when Hurricane Lane, a Category 5 storm, passed roughly 150 miles from the main islands without a direct hit but still dumped 58 inches of rain on Mauna Kea’s eastern slopes — the wettest tropical cyclone on record in Hawaii and the second-highest tropical cyclone rainfall total ever recorded in the U.S., trailing only Hurricane Harvey.
California’s closest recent brush came in 2023, when Hurricane Hilary prompted the National Hurricane Center’s first-ever tropical storm watch for Southern California, bringing flooding rain to a region unaccustomed to tropical moisture during its dry season — a reminder that “extremely rare” isn’t the same as “impossible.”
Exploring the Record Yourself
Orbis Weather’s historical tropical cyclone tracks tool draws on this same NOAA IBTrACS archive, letting readers browse storm tracks by category directly rather than rely on any one article’s summary of the data.
This article draws on NOAA’s IBTrACS and HURDAT2 technical documentation, National Hurricane Center and Central Pacific Hurricane Center climatology, NOAA’s Atlantic Oceanographic and Meteorological Laboratory, and published hurricane-science research to explain long-established patterns in the Eastern and Central Pacific storm record.
Sources: NOAA National Hurricane Center (Tropical Cyclone Climatology, HURDAT2 Northeast/North-Central Pacific format documentation, Tropical Cyclone Reports), NOAA Central Pacific Hurricane Center, NOAA Atlantic Oceanographic and Meteorological Laboratory (Hurricane Research Division), Michael Chenoweth and Chris Landsea (“The San Diego Hurricane of 2 October 1858,” Bulletin of the American Meteorological Society, 2004), NOAA Climate.gov, Climate Central, Scientific American, Wikipedia (storm-specific historical details)