Extreme Hurricane / Cyclone / Typhoon ● Monitoring
Typhoon Warning issued October 17 at 3:37PM ChST by NWS Tiyan GU, United States of America
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* WHAT...Typhoon conditions, including winds of 64 knots or more
are expected.
* WHERE...Guam and Rota Coastal Waters.
* WHEN...Onset of damaging winds beginning tonight. Onset of
destructive winds after midnight with typhoon force winds early
Sunday morning. Damaging winds will continue into at least Sunday
night, if Champi slows down.
* IMPACTS...Destructive to typhoon force winds will produce dangerous
to deadly seas that could damage, capsize or sink vessels, along
with drastically reducing visibilities in heavy rain.
* ADDITIONAL DETAILS...Typhoon Champi (29W) continues to move quickly
toward the Marianas. The exact path of 29W remains subject to
change. However, guidance supports a passage through Guam coastal
waters near the southern tip of Guam, with damaging winds moving in
late tonight and lasting into at least Sunday night. Champi is
expected to strengthen further today as it approaches, then move
through the region as a Category 3 typhoon Sunday morning. Seas
are quickly rising, with significant sea heights reaching as high
as 35 feet near the eye wall of Champi. Dangerous sea conditions
may continue into Monday.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Guam Coastal Waters; Rota Coastal Waters |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en-marine |
| Cap Urgency | Immediate |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-17T23:00:00+10:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportThis event as JSON · API and licence
Source updated 2 days ago (Oct 17, 2026 05:39 UTC) · we last heard from WMO Alert Hub (national weather services) 47 seconds ago
On a slow connection? Low-bandwidth version — no map, no scripts, under 14 KB.
Internet connectivity at the time
Internet connectivity in United States dropped 18 hours after this event, and stayed disrupted for about 1 hour.
From 18 Oct 2026 00:00 UTC to 18 Oct 2026 01:00 UTC. Detected by active probing — networks that stopped answering.
Internet outages have many causes — damaged cables, power failures, network maintenance and deliberate shutdowns among them. IODA detects the loss of connectivity and does not attribute it to anything. This is shown because it happened at the same time, not because one caused the other.
Measured by IODA, Georgia Institute of Technology.
About this location
The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.
Area as the agency stated it: Guam Coastal Waters; Rota Coastal Waters
Official authorities in United States
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Preparing for hurricane season, understanding watches vs warnings, storm surge evacuation, and riding out the storm safely.
Open Hurricane Safety Guide →Earlier hurricane / cyclone / typhoon events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
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