Live storm data
Cloudflare Pages requests the NHC CurrentStorms.json file and caches it for up to five minutes. An open page checks again every five minutes. New values appear only after the official feed publishes them.
Time and availability
Each storm shows the official advisory issue time. The NHC feed can relay WPC advisories after an inland or post-tropical handoff. A failed feed request is labeled unavailable; we do not substitute an old number and call it live. The Polo 2026 page is a historical archive and does not treat a post-tropical entry as a live hurricane forecast.
Scope
The NHC feed covers storms in its advisory areas, not every cyclone worldwide. Graphics are linked to NHC, and local emergency authorities remain the source for location-specific instructions.
Official bulletin stream
The news endpoint checks the Atlantic, Eastern Pacific and Central Pacific NHC/CPHC RSS feeds, with up to five minutes of caching. It shows original titles, publication times and links, not rewritten emergency bulletins. A partial failure is labeled; the page checks again every five minutes.
Country guides and following
Country pages link to the responsible national agencies. They do not provide a live global numerical feed. Following a storm saves a list in this browser only; it does not send alerts. Sharing uses your device share sheet or copies the page link.
Usage measurement
Cookieless Plausible measures visits and actions unless the reader selects essential-only. GA4 loads only after analytics consent. Following and read-advisory records stay in this browser. The Privacy page describes the choice and providers.
Forecast graphics and advisory handoffs
A current forecast cone is shown only when the official feed supplies cone metadata with a matching advisory time. An older image can remain online after cone updates stop; this site hides it instead of treating an HTTP success as proof of freshness. After a handoff, the official bulletin may be issued by WPC even while it remains linked from NHC.
Initial page summary
Home, storm and bulletin pages include a server-rendered official summary with source publication times when data is available. This summary is a snapshot when the page is requested; use the live panel and refresh control for later checks. The summary labels old or unavailable information and does not replace local warnings.
Eastern Pacific formation outlook
The outlook page reads the official NHC Eastern Pacific text product, retaining its issue time, disturbance labels and stated 48-hour and seven-day formation chances. A formation chance is not a probability of landfall at your location; the original English bulletin is available beside the three-language reading guide.
JMA Koguma coverage
The Koguma page reads JMA’s current system list and the matching 2026 forecast product. It shows the analyzed center and its analysis time separately from the product publication time. This source does not supply maximum wind or pressure in the product used here, so the panel does not infer those values. If Koguma leaves JMA’s current list, current values are cleared. NHC and JMA panels remain separate agency products.
Champi and automatic coastal warnings
Champi uses JMA TC2636 / 2630, independently of Koguma TC2634. The NHC coastal-warning panel reads the selected storm’s public advisory, matching its cyclone identifier, advisory number and publication time. It preserves official place names. Failed, stale or mismatched products do not populate current warning areas; open the linked official bulletin and local instructions.
Frequently asked questions
Does “checked five minutes ago” mean NHC issued a new forecast?
No. It is the time our site checked the feed. The advisory issue time beside each storm indicates when NHC issued that forecast.
What happens during an outage?
The page labels the feed unavailable and hides storm values instead of displaying old figures as current. Use the linked NHC site directly.
Can I use this site for emergency decisions?
Use this site to find and understand primary sources. Follow NHC, your national weather service and local emergency officials for safety instructions.
Reviewed 2026-10-18. Independent guide; follow NHC and local authorities for safety decisions.