Severe Hurricane / Cyclone / Typhoon ● Monitoring
Tropical Storm Warning issued October 16 at 4:11PM ChST by NWS Tiyan GU, United States of America
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...TROPICAL STORM CHAMPI MOVING RAPIDLY WEST ON APPROACH TO THE
MARIANAS...
...CHAMPI LIKELY TO MOVE NEAR GUAM AND ROTA AS A TYPHOON...
.NEW INFORMATION...
A Typhoon Warning has been issued for Guam, Rota, and the adjacent
waters.
A Tropical Storm Warning has been issued for Tinian, Saipan, and the
adjacent waters.
.AREAS AFFECTED...
This local statement provides information and recommended action for
people on Guam, and people on Rota, Tinian and Saipan in the
Commonwealth of the Northern Marianas.
.WATCHES/WARNINGS...
A Typhoon Warning is in effect for Guam and Rota.
A Tropical Storm Warning is in effect for Tinian and Saipan.
A Typhoon Watch continues for Tinian and Saipan.
A Flood Watch is in effect for all of Guam and the Northern Marianas.
Please listen closely for any Flood Warnings that might be in effect
for your area.
Please check the latest public and marine forecasts for detailed
information about additional hazards.
.STORM INFORMATION...
At 200 PM ChST, the center of Tropical Storm Champi (29W) was located
near latitude 11.4N and longitude 153.3E, about 300 miles north-
northeast of Chuuk and about 590 miles east-southeast of Guam. Storm
motion was west, 265 degrees, at 24 mph. Storm intensity was 50 mph.
Champi will continue on this trajectory and slow down as it continues
barreling toward the Marianas. This general forecast track will take
Champi close to, or over, Guam Sunday morning. Champi is forecast to
continue intensifying over the next few days, likely becoming a
typhoon by Saturday.
.SITUATION OVERVIEW...
Mostly benign conditions are expected across the Marianas tonight,
followed by a steady increase in showers and winds Friday afternoon,
and then deteriorating significantly coming into Saturday night as
Tropical Storm Champi continues to move in from the east-southeast.
Champi is expected to go through a period of rapid intensification
over the next 24 hours, becoming a typhoon by Saturday and
strengthening further thereafter. Winds an
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Tinian; Saipan |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Immediate |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-17T00:15:00+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 3 days ago (Oct 16, 2026 06:12 UTC) · we last heard from WMO Alert Hub (national weather services) 31 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 42 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: Tinian; Saipan
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.