San Juan, Puerto Rico
Regional Weather Alerts
| Alert: | Flood Advisory |
| Area(s): | Humacao, PR; Las Piedras, PR; Naguabo, PR |
| Effective: | 2026-04-18 @ 1:54 am -> 2026-04-18 @ 5:00 am |
| Onset: | 2026-04-18 @ 1:54 am -> 2026-04-18 @ 5:00 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS San Juan PR on 2026-04-18 @ 1:54 am |
| Headline: | Flood Advisory issued April 18 at 2:54AM AST until April 18 at 6:00AM AST by NWS San Juan PR |
| Description: |
* WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...Humacao, Las Piedras and Naguabo. * WHEN...Until 600 AM AST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 251 AM AST, Doppler radar indicated heavy rain. This will cause urban and small stream flooding. Up to 1 inch of rain has fallen since midnight. Nevertheless, around 2 to 4 inches fell before midnight and it has not stop raining. - Additional rainfall amounts up to 1 inch are expected over the area. This additional rain will result in minor flooding. |