Rio Rosario near Hormigueros, PR

River level and flood forecast · Hormigueros County

Normal1.7 ftas of Tue 1:30 AM

The river is 7.8 ft below flood stage (9.5 ft).

Flow: 41 cubic feet per second (USGS).

The last 7 days and the forecast

NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.

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An email when the National Weather Service forecasts Rio Rosario near Hormigueros to flood, when it floods, and when it's over.

Flood stages

Major flood stage	16 ft
Moderate flood stage	13 ft
Flood stage	9.5 ft
Action stage	6 ft
Record crest (September 20, 2017)	19.5 ft

What floods at each level

From the National Weather Service, highest first.

15 ftFlooding will widespread affect the yard of the houses next to the bridge of PR-348, intersection with PR-345. There could be damage to patio furniture and parked cars, but the houses should not be flooded.
12 ftRiver will begin to overflow in the outer yard of the houses next to the bridge in PR-348, intersection with PR-345.
11 ftRiver will reach bankful stage in the proximity of the USGS gage.
10 ftCommunity San Jose, Calle Jose Caballero and Calle San Jose affected by flooding. OMS/7.2019

Highest crests on record

19.5 ft — September 20, 2017
18.66 ft — September 22, 1998
14.87 ft — September 18, 2022
13.98 ft — May 2, 2025
13.64 ft — August 24, 1988

Recent crests: 13.98 ft (May 2, 2025) · 13.23 ft (August 14, 2024) · 10.79 ft (May 7, 2024) · 14.87 ft (September 18, 2022) · 12.4 ft (August 11, 2022)

Up and down the river, and nearby

See it on the live map →Radar & warnings for Hormigueros County NWS gauge page USGS gauge 50136400

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (MAYP4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.