Flash Flood Warning Issued for Central Guam
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NWS Tiyan GU has issued a Flash Flood Warning for Central Guam until 4:30 PM ChST on September 9 due to thunderstorms producing heavy rain.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Guam
- Issued
- September 9, 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: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Flash Flood Warning issued by NWS Tiyan GU. Effective from September 9 at 3:02 PM ChST until September 9 at 4:30 PM ChST. Severity: Severe. Urgency: Immediate. Certainty: Likely.
Affected Areas
Central Guam, including Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Talofofo, Mongmong-Toto-Maite, Sinajana and Santa Rita.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.
Expected Conditions
At 3:02 PM ChST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1.0 and 2.0 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1.5 inches are possible. Flash flooding is ongoing or expected to begin shortly. Hazard: Flash flooding caused by thunderstorms. Source: Radar indicated. Impact: Flash flooding of small creeks and streams, urban areas, highways, and streets as well as other poor drainage and low-lying areas.
Timeline
Alert effective September 9 at 3:02 PM ChST. Expires September 9 at 4:30 PM 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 (1,121 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 9, 2026.
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