Flash Flood Warning Issued for Arroyo, Maunabo, Patillas, Yabucoa PR
This alert is no longer in effect.
NOAA issued it on September 1, 2026, 13 days 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.
NWS San Juan PR has issued a Flash Flood Warning for Arroyo, Maunabo, Patillas and Yabucoa until 3:15 AM AST due to thunderstorms producing heavy rain.
The weather record, at a glance
- Record type
- Flash Flood Warning
- Affected area
- Southeastern Puerto Rico
- Issued
- September 1, 2026
- Issuing authority
- NWS San Juan PR
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 13 days ago; use the issuing agency's live warning service for current conditions in Southeastern Puerto Rico.
Alert Details
Flash Flood Warning issued by NWS San Juan PR. Effective from September 1 at 12:21 AM AST until September 1 at 3:15 AM AST. Severity: Severe. Urgency: Immediate. Certainty: Likely.
Affected Areas
Arroyo, PR; Maunabo, PR; Patillas, PR; Yabucoa, PR.
What You Should Do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
Expected Conditions
Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. Hazard: Flash flooding caused by thunderstorms. Source: Radar indicated.
Timeline
Alert effective September 1 at 12:21 AM AST. Expires and ends September 1 at 3:15 AM AST.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Comparable nationwide notices (length or severity timing) 8
Two cross-category peer sets, both computed from Areazine's own archive: notices with a similar body length, and notices near the same severity and agency date. These are drawn from other categories, not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,112 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 1, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.