Extreme Hurricane / Cyclone / Typhoon ● Monitoring
Typhoon Warning issued October 17 at 11:12AM 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 Saturday night. Onset of
destructive winds Sunday morning. Damaging winds will continue into
at least Sunday night, possibly longer if conditions warrant.
* IMPACTS...Destructive winds will produce dangerous 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, 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
typhoon Sunday morning. Seas will quickly rise, with significant
sea heights reaching as high as 35 feet during closest passage 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 | 2026-10-18T06:00:00+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 01:13 UTC) · we last heard from WMO Alert Hub (national weather services) 50 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 23 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
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.