How Atlantic hurricanes are tracked

One of the longest weather archives on Earth, rebuilt storm by storm.

The question this tool answers

Every Atlantic hurricane season is more than a count. A year with many weak storms can look busy on paper, while a year with fewer long-lived major hurricanes can generate far more energy and damage. This dashboard asks how the latest completed season ranks, which named storm defined it, where storms travelled, and how the season compares with the long Atlantic record.

How we know

The core source is NOAA's HURDAT2 archive, the National Hurricane Center's best-track record for Atlantic tropical and subtropical cyclones back to 1851. “Best track” means the post-analysis estimate of where a storm was, how strong it was, and what type it was at regular six-hour intervals. It is not a live forecast cone. It is the cleaned-up historical record after meteorologists reconcile observations.

The early record is remarkable because it predates satellites, radar, and aircraft reconnaissance. Nineteenth-century storms were reconstructed from ship logs, coastal weather stations, barometer readings, newspapers, and later reanalysis work. That makes HURDAT2 one of the longest weather records on Earth, but also one whose oldest decades are less complete than the satellite era. A storm that stayed at sea in 1870 could easily have been missed; one in 2025 almost certainly was not.

The choices we made

The headline leads with rank and a named storm because names carry memory. “13 named storms, 6 hurricanes, 4 majors” is useful, but it is a stat block. “Melissa reached Category 5” gives the season a shape. The footnote keeps the full accounting: named storms, hurricanes, major hurricanes, ACE, and landfalls.

The signature track is chosen from the season archive by peak wind, then by ACE. The full grid remains below for comparison, but one large track makes the geography legible: where the storm formed, where it intensified, whether it crossed the Caribbean, Gulf, or open Atlantic, and how long it stayed dangerous.

We use ACE, accumulated cyclone energy, as the season-energy measure. ACE sums the square of a storm's wind speed at six-hour intervals while it is at least tropical-storm strength. Long-lived major hurricanes dominate ACE because wind speed is squared; a short weak storm barely moves the season total. That is a feature, not a bug, when the question is basin energy rather than headline count.

What categories do and do not say

The Saffir-Simpson scale is a wind scale. Category 1 begins at 74 mph sustained wind; Category 3 begins at 111 mph and is called a major hurricane; Category 5 begins at 157 mph. The scale is memorable because it is simple, but it does not measure storm surge, rainfall flooding, tornadoes, or storm size. A slow Category 1 can produce catastrophic flooding; a compact Category 4 can devastate a narrow corridor.

What this tool cannot tell you

It cannot replace National Hurricane Center advisories during active storms. HURDAT2 is historical best-track data, usually revised after post-season analysis. If a storm is approaching land, the only responsible sources are NHC, local emergency managers, national weather services, and local officials.

It also cannot make the early record as reliable as the modern record. Satellite coverage after the 1960s and aircraft reconnaissance in the western Atlantic dramatically improved detection and intensity estimates. Long-term comparisons are still useful, but exact rank claims are strongest in the satellite era.

Credits

This page depends on the forecasters, hurricane specialists, aircraft crews, satellite analysts, ship observers, and reanalysis teams whose work became HURDAT2. Seasonal outlooks are typed from public releases by NOAA CPC, Colorado State University, the UK Met Office, Penn State, and related forecast groups. The dashboard summarizes public data; it does not issue warnings.

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