Update, October 31, 3:35 p.m. AST: The National Weather Service issued additional flood advisories for western and central Puerto Rico as thunderstorms produced heavy rain.

The newest notice covers Hormigueros, Maricao, Mayagüez and San Germán until 6:30 p.m. Atlantic Standard Time. Radar at 3:34 p.m. indicated one to two inches of rain had fallen, with another one to two inches expected in that advisory area.

A separate advisory issued at 3:03 p.m. covers southeastern Ciales, western Coamo, Jayuya, northern Juana Díaz, Orocovis and Villalba until 6 p.m. AST. It also reports one to two inches already fallen and forecasts another one to two inches. Jayuya, Villalba and Los Llanos are among the locations identified in that bulletin.

Both notices describe minor flooding in low-lying areas and places with poor drainage. Some low-water crossings may become impassable. The rainfall estimates and forecasts apply to their respective advisory areas; they are not measurements for every neighborhood.

These advisories have different boundaries and scheduled expiration times from the earlier Lares-area notice below. The weather service's public safety instructions advise people to avoid flooded roads.

Earlier October 31 Reporting — Lares-Area Advisory:

The National Weather Service in San Juan issued a flood advisory for Lares, Las Marías, San Sebastián and Utuado in Puerto Rico on Saturday, October 31.

The notice concerns urban areas and small streams affected by heavy thunderstorm rainfall. It remains in effect until 4:45 p.m. Atlantic Standard Time, according to the bulletin.

At 2:48 p.m. AST, radar indicated that between one and two inches of rain had already fallen. Forecasters expected another one to two inches within the advisory area.

The weather service identified possible minor flooding in low-lying places and locations with poor drainage, along with rises in small streams and normally dry arroyos.

The advisory's rainfall totals describe the conditions and forecast reported at its issuance. They do not establish that every neighborhood in the four municipalities has received the same amount of rain.

The agency advises people to avoid flooded roads. Its public instructions also warn that low-water crossings in hilly terrain can become dangerous during heavy rainfall.

The bulletin was issued at 2:49 p.m. AST. The 4:45 p.m. ending time is the advisory's scheduled expiration, rather than a guarantee that all roads or streams will have returned to normal.

Sources NWS San Juan — October 31 Flood Advisory: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9ce793288c2cb2db515f8478c032a98ad76c056f.001.1 NWS San Juan — October 31, 3:35 p.m. AST Advisory: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c09f4eed56fd53e8a75f3c5f928f2235b27c7c28.001.1 NWS San Juan — October 31, 3:03 p.m. AST Advisory: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2db7f091e98b60430bcc3ae2bbf85721cfb471aa.001.1