Straight answers about Hurricane Calendar, the storm records behind it, and how to read them.
Hurricane Calendar is a history app from Aquarius Mobile Studios that shows recorded hurricanes, typhoons and tropical cyclones by date. Pick any day, week, month, season or range, choose an ocean, and see which storms formed, peaked, made landfall or were active then, each with an animated replay of its official track. It covers every ocean basin from 1842 to 2026 and is in development for Android.
Almost certainly somewhere in the world, and Hurricane Calendar shows you which. Every date on the calendar has recorded storms: the quietest day in the archive, April 28, still has 75 storms on record, and September 9 has 577. Add your birthday as a personal date to see the storms that formed, peaked or made landfall on that date in history, and add the year to see which storms were active on the day you were born. You can narrow it to one ocean, such as the Atlantic or the western Pacific.
They are the same kind of storm, a tropical cyclone, named differently by region. It is called a hurricane in the North Atlantic and the central and eastern North Pacific, a typhoon in the western North Pacific, and a cyclone in the South Pacific and the Indian Ocean. Hurricane Calendar uses the word the responsible forecast agency uses.
From official best-track records: NOAA’s International Best Track Archive for Climate Stewardship (IBTrACS), which combines the records of the world’s forecast centers, merged with the National Hurricane Center’s HURDAT2 databases for the Atlantic and the Northeast and North Central Pacific. Satellite imagery comes from NASA, sea-surface temperature and ocean depth from NOAA, and storm names from the World Meteorological Organization. The Data & Sources page lists every source and how to cite it.
The archive starts in 1842 and runs to 2026. The National Hurricane Center’s records begin in 1851 for the Atlantic and in 1949 for the eastern and central North Pacific; coverage elsewhere varies by region. Records from before satellite monitoring began in the 1960s are less complete: storms far from ships and coasts could go unrecorded, and intensities were often estimated. Hurricane Calendar shows missing values as missing rather than guessing.
No. It is a history app. It shows storms that have already happened and never gives forecasts or warnings, and storms that may still have been active when its archive was updated are held back. For a current storm, follow your national weather service or the official forecast centers, such as the U.S. National Hurricane Center, the Japan Meteorological Agency, the India Meteorological Department, Météo-France La Réunion, Australia’s Bureau of Meteorology or the Fiji Meteorological Service.
Agencies average winds over different periods. The U.S. centers use 1-minute sustained winds, the India Meteorological Department uses 3-minute winds and most other agencies use 10-minute winds, which read lower for the same storm. Hurricane Calendar shows each value exactly as its agency recorded it, labeled with the agency and averaging period, and never converts one into another.
They are the official best tracks: each agency’s final, quality-controlled record of a storm’s position and intensity, usually every six hours. Between those fixes the replay moves the storm along a smooth estimate and labels it as interpolated. Positions and intensities from before the satellite era carry more uncertainty, and real-time records that are still under review are marked provisional.
Yes, for storms since 2000. Hurricane Calendar shows NASA’s daily satellite mosaics for the dates a storm was active — MODIS on Terra from February 2000, on Aqua from July 2002, and VIIRS from November 2015 — under the storm’s recorded track. Older storms are drawn over NASA’s Blue Marble relief, labeled as such. No image is ever AI-generated.
Official naming started late. Atlantic storms have carried official names only since 1950: phonetic-alphabet names until 1952, women’s names from 1953, and men’s names added in 1979. Other regions began naming at different times. Earlier storms, and weaker storms that were never named, appear as unnamed or under a well-known historical name, such as the 1900 Galveston hurricane.
Each ocean has official name lists maintained by the World Meteorological Organization’s regional committees. In the Atlantic and eastern North Pacific the lists repeat every six years. When a storm is so deadly or destructive that reusing its name would be inappropriate, the committee retires the name and chooses a replacement. Hurricane Calendar shows every list, marks retired names and lets you look up any name.
Hurricane Calendar is still in development and its pricing has not been set. The full calendar, every source and the links to official warnings will always be free, any paid extras will be optional, and there are no ads.
Yes. Hurricane Calendar has no account, no ads and no analytics. Your settings, saved storms and personal dates stay on your device, and you can export or delete them in Settings. The privacy policy explains the few requests the app makes to load maps and imagery.
Use Report a suspected error on the storm’s page in the app, or email support@meetamsai.com with the storm and what looks wrong. Every correction is checked against the official source before the next data update.
It is in development for Android and not yet on Google Play. Email support@meetamsai.com with the subject Hurricane Calendar launch to get one email when it is released, and nothing else.