# Hurricane & Storm Tracking > Terrapin Associates hurricane tracking site providing up-to-date information about tropical cyclones in the Atlantic and Pacific oceans. Data is sourced from the US National Weather Service via the National Weather Wire Service. The site is intended for current storm monitoring, research, and historical reference. The StormTrack system automatically creates an entry for each tropical depression, storm, or hurricane when the National Weather Service begins issuing advisories. The site updates hourly; during active hurricane season, storm entries, advisory text, and track plots are refreshed as new data becomes available. ## Start here - [Current state, complete](https://hurricane.terrapin.com/llms-full.txt): Every active storm and the verbatim text of the current Tropical Weather Outlooks and Discussions, in one plain-text file. Regenerated hourly. Fetch this first — it answers most questions without further requests, including formation probabilities for a given area over the next 2 and 7 days. ## Docs - [About](https://hurricane.terrapin.com/about.html): Overview of the site's purpose, how StormTrack works, and what content is available. - [Privacy Policy](https://hurricane.terrapin.com/privacy.html): Privacy practices for hurricane.terrapin.com, maintained by Terrapin Associates. ## Data All data is static JSON and CSV over plain HTTP GET. No key, no rate limit, CORS open. Stable URLs — these never change: - [Active storms and outlooks](https://hurricane.terrapin.com/storm-data/index.json): Every storm currently under advisory, plus pointers to the current outlooks. Includes a `meta` block giving units, field meanings and URI templates. - [Finished storms this season](https://hurricane.terrapin.com/storm-data/season.json): Storms whose advisory cycle has ended this calendar year. - [Atlantic Tropical Weather Outlook](https://hurricane.terrapin.com/adv-text/latest-atlantic-outlook.json): Formation chances for the Atlantic, Caribbean and Gulf over the next 2 and 7 days. - [Eastern Pacific Tropical Weather Outlook](https://hurricane.terrapin.com/adv-text/latest-epacific-outlook.json) - [Atlantic Tropical Weather Discussion](https://hurricane.terrapin.com/adv-text/latest-atlantic-discussion.json): Area-by-area synoptic discussion. - [Eastern Pacific Tropical Weather Discussion](https://hurricane.terrapin.com/adv-text/latest-epacific-discussion.json) - [Sitemap](https://hurricane.terrapin.com/sitemap.xml) - [RSS feed](https://hurricane.terrapin.com/index.xml): Storm updates and outlooks; item descriptions carry the storm's current position and intensity, and the outlook text. The National Hurricane Center reissues the outlooks several times a day under a new identifier. The `latest-*` URLs above always resolve to the current issuance; a `/text/` URL is a snapshot and returns HTTP 404 once that issuance is superseded. Per-storm URL patterns, where `{storm}` is an id such as `06E` and `{id}` is an advisory identifier: - `https://hurricane.terrapin.com/storm/{storm}` — rendered page - `https://hurricane.terrapin.com/storm-data/{storm}.json` — latest position, plus an index of recent advisories - `https://hurricane.terrapin.com/storm-data/{storm}-data.csv` — full observed track, one row per advisory - `https://hurricane.terrapin.com/adv-text/{storm}-ctrack.png` — observed and forecast track plot (active storms only) - `https://hurricane.terrapin.com/text/{id}` — rendered advisory text - `https://hurricane.terrapin.com/adv-text/{id}.json` — advisory text as JSON ### Field reference - `wind` — knots, maximum sustained surface wind - `pressure` — millibars (hPa), minimum central pressure - `lat` — decimal degrees north, WGS84 (negative = south) - `long` / `lon` — decimal degrees east, WGS84 (negative = west) - `adv_date` — advisory valid time, UTC - `utime` — advisory valid time, Unix epoch seconds, UTC - `storm` — two digits and a basin letter: `A` = Atlantic, `E` = Eastern Pacific, `C` = Central Pacific - `expired` — null or absent while advisories are still being issued - `mtype` — WMO/AWIPS header of the advisory the position came from The `classification` field (`Tropical Storm`, `Category 3 Hurricane`, and so on) is derived from the reported maximum sustained wind, not read from the advisory, and can differ from the National Hurricane Center's own designation for a post-tropical system. The advisory text is verbatim and authoritative; prefer it when the two disagree. ## Attribution Underlying observations and forecasts are produced by the NOAA/NWS National Hurricane Center and are in the public domain. Please attribute the National Hurricane Center as the data source and Terrapin Associates as the publisher of this site. This site is not an official source; for warnings and decisions affecting life or property, use the National Hurricane Center directly. ## Optional - [Home](https://hurricane.terrapin.com/): Current storm list and entry point to active storm pages. - [Current season archive](https://hurricane.terrapin.com/season/): Storms that have completed their advisory cycle this year. - [Caribbean Hurricane Network](https://www.stormcarib.com/): External partner resource for Caribbean storm coverage. - [National Hurricane Center](https://www.nhc.noaa.gov/): Authoritative source; upstream data provider via National Weather Wire Service. - [Contact](https://weather.terrapin.com/hurricane-request): For site issues, corrections, or questions about storm pages.