NOAA NWS / Event history

Flood Warning issued October 18 at 1:21PM AST until October 18 at 4:15PM AST by NWS San Juan PR

Flood Warning · Humacao, PR; Naguabo, PR. Severe; likely; urgency: expected.

See the first saved record ↓Detailed event record ↗

Bulletin issued: 18 October 2026 at 17:21 UTC
First saved by us: 18 October 2026 at 17:32 UTC
Last included in a daily record: 18 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: Severe · Source alert

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

Issuer / area: NWS San Juan PR · Humacao, PR; Naguabo, PR
Certainty / urgency: Likely / Expected
Message expiry (not hazard end): 18 October 2026 at 20:15 UTC
Forecast onset / end: 18 October 2026 at 17:21 UTC / 18 October 2026 at 20:15 UTC

Archived official description

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northeastern Humacao County in Puerto Rico... Western Naguabo County in Puerto Rico... * WHEN...Until 415 PM AST. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. Low-water crossings are inundated with water and may not be passable. * ADDITIONAL DETAILS... - At 116 PM AST, Rio Blanco out of its banks causing flooding along low lying areas. Flooding is already occurring in the warned area. - Some locations that will experience flooding include... Road PR-191 could be impassable. Road PR-31, Exit 22 toward Highway PR-53 will be impassable as well. The exit toward the highway may be flooded as well. - http://www.weather.gov/safety/flood

Instructions in this archived message

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

The saved record

What changed

0 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

First saved record · 18 October 2026 at 17:32 UTC

Saved by us

18 October 2026 at 17:32 UTC

Starting point

First saved record

Our first saved version of Flood Warning issued October 18 at 1:21PM AST until October 18 at 4:15PM AST by NWS San Juan PR. We have no earlier saved version to compare.

Bulletin issued: 18 October 2026 at 17:21 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:92808bc759e8acf5219193ab",
  "authorityId": "urn:oid:2.49.0.1.840.0.33dbf198cc14cf43444da254abbc40cc68095444.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Flood Warning issued October 18 at 1:21PM AST until October 18 at 4:15PM AST by NWS San Juan PR",
  "eventType": "Flood Warning",
  "occurredAt": "2026-10-18T17:21:00.000Z",
  "issuedAt": "2026-10-18T17:21:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-18T17:21:00.000Z",
  "onsetAt": "2026-10-18T17:21:00.000Z",
  "expiresAt": "2026-10-18T20:15:00.000Z",
  "forecastEndAt": "2026-10-18T20:15:00.000Z",
  "severity": "Severe",
  "urgency": "Expected",
  "certainty": "Likely",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "Humacao, PR; Naguabo, PR",
  "coordinates": null,
  "issuer": "NWS San Juan PR",
  "summary": "Flood Warning · Humacao, PR; Naguabo, PR. Severe; likely; urgency: expected.",
  "description": "* WHAT...Flooding caused by excessive rainfall is expected.\n\n* WHERE...Northeastern Humacao County in Puerto Rico...\nWestern Naguabo County in Puerto Rico...\n\n* WHEN...Until 415 PM AST.\n\n* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying\nand flood-prone locations is imminent or occurring. Low-water\ncrossings are inundated with water and may not be passable.\n\n* ADDITIONAL DETAILS...\n- At 116 PM AST, Rio Blanco out of its banks causing flooding along\nlow lying areas. Flooding is already occurring in the warned\narea.\n- Some locations that will experience flooding include...\nRoad PR-191 could be impassable. Road PR-31, Exit 22 toward\nHighway PR-53 will be impassable as well. The exit toward the\nhighway may be flooded as well.\n- http://www.weather.gov/safety/flood",
  "instruction": "Turn around, don't drown when encountering flooded roads. Most flood\ndeaths occur in vehicles.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.33dbf198cc14cf43444da254abbc40cc68095444.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

Visit the external source ↗

The external page may have changed since this version was saved.