Severe Hurricane / Cyclone / Typhoon ● Active
Typhoon Watch issued October 18 at 9:49AM ChST by NWS Tiyan GU, United States of America
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* WHAT...Tropical storm conditions, including winds of 34 to 63
knots, are expected.
* WHERE...Tinian and Saipan Coastal Waters.
* WHEN...Damaging winds will continue into this afternoon, possibly
longer if Champi slows down.
* IMPACTS...Damaging tropical storm force winds will produce
dangerous seas that could damage, capsize or sink vessels, along
with drastically reducing visibilities in heavy rain.
* ADDITIONAL DETAILS...Super Typhoon Champi (29W) continues to move
quickly away from the Marianas. Champi passed close to the southern
tip of Guam, less than 10 NM, as a strong Category 4 storm. Champi
is expected to strengthen further as it moves through the
Philippine Sea, possibly becoming a Category 5 super typhoon. Seas
are expected to remain hazardous through at least this afternoon,
with significant sea heights as high as 20 feet over western
waters, closest to Champi. Dangerous sea conditions may continue
into Monday.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Tinian Coastal Waters; Saipan Coastal Waters |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en-marine |
| Cap Urgency | Future |
| Cap Certainty | Possible |
| Cap Expires | 2026-10-18T18:00:00+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 1 day ago (Oct 17, 2026 23:51 UTC) · we last heard from WMO Alert Hub (national weather services) 53 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 11 minutes 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: Tinian Coastal Waters; Saipan 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.