Coastal Flood Warning Issued for Guam and Marianas Islands
This alert is no longer in effect.
NOAA issued it on April 13, 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 Coastal Flood Warning is in effect for Guam, Rota, Tinian, and Saipan until April 16, 2026, with significant flooding and high surf expected due to incoming storms.
Read this weather record in 30 seconds
- Record type
- Coastal Flood Warning
- Affected area
- Marianas Islands
- Issued
- April 13, 2026
- Issuing authority
- NWS Tiyan GU
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Marianas Islands.
Alert Details
The Coastal Flood Warning has been issued by NWS Tiyan GU, effective from April 13, 2026, at 3:54 PM ChST until April 16, 2026, at 5:00 AM ChST. This alert is categorized as severe and is based on NOAA data.
Affected Areas
The warning affects Guam; Rota; Tinian; and Saipan, specifically the north, east, and south facing reefs and shorelines of the Marianas.
What You Should Do
Everyone should remain out of the water due to life-threatening surf conditions. Stay off of jetties, piers, and other waterside infrastructure to avoid risks.
Expected Conditions
Significant coastal flooding of 1 to 3 feet is expected for Guam, and 4 to 8 feet for Rota, Tinian, and Saipan. Additionally, dangerously large breaking waves of 12 to 16 feet for Guam and 15 to 25 feet for Rota, Tinian, and Saipan are anticipated, along with potential shoreline erosion and inundation of low-lying property.
Timeline
The alert is effective from April 13, 2026, at 3:54 PM ChST and ends on April 16, 2026, at 5:00 AM ChST.
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 (1,031 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 13, 2026.
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Common questions about this NWS weather alert.