Tropical Storm Warning Issued for Guam Coastal Waters
This alert is no longer in effect.
NOAA issued it on April 12, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Tropical Storm Warning is in effect for Guam Coastal Waters, with tropical storm force winds of 40 to 60 knots expected as early as late Monday afternoon and possible typhoon conditions within 48 hours.
Read this weather record in 30 seconds
- Record type
- Tropical Storm Warning
- Affected area
- Guam Coastal Waters
- Issued
- April 12, 2026
- Issuing authority
- NWS Tiyan GU
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Guam Coastal Waters.
Alert Details
A Tropical Storm Warning has been issued by NWS Tiyan GU. It is effective from April 12, 2026, at 4:14 PM ChST.
Affected Areas
The warning affects Guam Coastal Waters.
What You Should Do
Inexperienced mariners, especially those operating smaller vessels, should avoid boating in hazardous conditions. Seek safe harbor as soon as possible, as venturing out can result in significant threat to life and/or property.
Expected Conditions
Tropical storm force winds of 40 to 60 knots are expected. Typhoon conditions, including winds of 64 knots or more, are possible within the next 48 hours. Conditions are expected to be incredibly dangerous for small craft and also pose a threat to large vessels.
Timeline
The alert is effective from April 12, 2026, at 4:14 PM ChST and expires on April 13, 2026, at 6:00 AM ChST. It is in effect through at least Wednesday morning.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (898 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 12, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.