Puerto Rico Minor Flood Advisory | Effective 09/01/2026 00:21

Headline: 
Flood Advisory issued September 1 at 3:21AM AST until September 1 at 6:15AM AST by NWS San Juan PR
Event: 
Flood Advisory
Urgency: 
Expected
Effective: 
September 1, 2026 - 12:21am
Expires: 
September 1, 2026 - 3:15am
Description: 
* WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...Arroyo, Maunabo, Patillas, Yabucoa... * WHEN...Until 615 AM AST. * IMPACTS...Rises in small streams and normally dry arroyos. Some low-water crossings may become impassable. River or stream flows are elevated. * ADDITIONAL DETAILS... - At 315 AM AST, Doppler radar indicated heavy rain due to thunderstorms. This will cause urban and small stream flooding. Between 2 and 4 inches of rain have fallen over the last hours. - PR-184 near Rio Grande de Patillas. Also, Rio Guayanes in Yabucoa is elevated.
Instruction: 
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.
Area Description: 
Arroyo, PR; Maunabo, PR; Patillas, PR; Yabucoa, PR
Forcast Office: 
NWS San Juan PR
Sender: 
w-nws.webmaster@noaa.gov