Flash Flood Warning Issued for Guam as Heavy Thunderstorms Move Through Region
This alert is no longer in effect.
NOAA issued it on April 6, 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).
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The National Weather Service has issued an immediate Flash Flood Warning for Guam, with rainfall rates up to 3 inches per hour expected to cause significant flooding.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Guam
- Issued
- April 6, 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 Guam.
Alert Details
The National Weather Service in Tiyan GU has issued a Flash Flood Warning for the island of Guam. The alert was issued at 7:50 AM ChST on March 2, 2026, following radar indications of heavy thunderstorms producing intense rainfall across the region.
Affected Areas
The warning covers the entire island of Guam. Specific locations expected to experience flash flooding include:
- Dededo, Tamuning, Yigo, and Mangilao
- Chalan Pago-Ordot, Barrigada, Yona, and Hagatna Heights
- Andersen AFB and Talofofo
- Mongmong-Toto-Maite, Sinajana, and Inarajan
- Asan, Merizo, Piti, Santa Rita, and Umatac
What You Should Do
Residents and travelers are urged to follow the safety mantra: "Turn around, don't drown." Do not attempt to drive through flooded roads, as most flood-related deaths occur in vehicles. Avoid low-lying areas, small creeks, and streams where water levels can rise rapidly.
Expected Conditions
Doppler radar indicates that between 1 and 3 inches of rain have already fallen. Meteorologists expect rainfall rates of 1 to 3 inches per hour as thunderstorms continue. Additional rainfall amounts of 2 to 4 inches are possible in the warned area. These conditions are likely to cause flash flooding of urban areas, streets, and poor drainage locations.
Timeline
The Flash Flood Warning is effective immediately as of 7:50 AM ChST and is currently scheduled to expire at 9:15 AM ChST on March 2, 2026.
Original source: NOAA Official Notice ↗
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