National Weather Service United States Department of Commerce

Hydrology and River Information


Understanding Floods

Urban and Small Stream Flood Advisory

 

            Carolina, PR

Urban and Small Stream Advisory

Inundaciones Urbanas y de Pequeños Riachuelos

What is it? Flooding of small streams, streets and low lying areas.

What to do? Stay away from areas that are prone to flooding.  Stay clear of rapidly moving water.

¿Qué es? Inundaciones de quebradas, calles y áreas bajas.

¿Qué hacer? Mantenerse lejos de áreas propensas a inundaciones.  Manténgase lejos de agua en movimiento.

 

Flash Flood Warning

            Utuado, PR

Flash Flood Warning

Avisos de Inundaciones Repentinas

What is it? Flood impacts are occurring or imminent.

What to do? Stay alert for inundated roadways and follow instructions from authorities. Additional impacts include structures that could become flooded and need to be evacuated.

¿Qué es? Inundaciones están ocurriendo o son inminentes.

¿Qué hacer? Manténgase informado sobre carreteras inundadas y siga las instrucciones de las autoridades. Impactos adicionales incluyen estructuras que podrían inundarse y podrían ser evacuadas.

 

Flash Flood Emergency

                         Comerio, PR

Flash Flood Emergency

Emergencia de Inundaciones Repentinas

What is it? Flash flood situations that represent extreme danger.

What to do? Immediately reach higher ground by any means possible.

¿Qué es? Inundaciones repentinas que representan extremo peligro.

¿Qué hacer? Muévase a terreno alto inmediatamente.

 

Flash Flood Watch

Flash Flood Watch

Vigilancia Inundaciones Repentinas

What is it? Flooding is possible – typically within 6 to 48 hours.

What to do? Stay informed and prepare for water rises along rivers that could affect nearby roads and buildings.

¿Qué es? Inundaciones son posibles típicamente dentro de 6 a 48 horas.

¿Qué hacer? Mantenerse informado y prepararse para aumento de niveles de ríos, que pudieran alcanzar carreteras y estructuras.

 


***Image generation could take a few minutes***

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Observed Rainfall

1-day rainfall 7-day rainfall 14-day rainfall

 

Departure from Normal Rainfall

7-day rainfall deficit 30-day rainfall deficit 60-day rainfall deficit

 

Advanced Hydrologic Prediction Services (AHPS)


Rainfall Forecast

24 hr Rainfall Forecast Total Today

 

24 hr Rainfall Forecast Total Tomorrow

Soil Saturation

Latest Volumetric Soil Moisture Image

 

Latest Soil Saturation

 

Puerto Rico Agricultural Water Management


Streamflows Statistics

Today 7- Day Average

 

14- Day Average  28- Day Average

 

United States Geological Survey (USGS) Water Watch


Flood Conditions

Water Data by Puerto Rico River Basin Grouping

Río Cibuco-Guajataca Basin

Rio Cibuco Rio Manati near Ciales Rio Manati near Manati
 
Rio Grande Arecibo blw Utuado Lago Dos Bocas Rio Grande Arecibo abv Arecibo

 

Río Patillas-Loco Basin

Rio Coamo Rio Cerrillos Rio Portugues

 

Río Guanajibo-Culebrinas Basin

Rio Grande de Añasco Rio Culebrinas near Moca Rio Culebrinas Aguada
 
Rio Rosario Rio Guanajibo

 

Río de la Plata-Maunabo Basin

Rio de La Plata nr Toa Alta Rio de la Plata blw La Plata Dam Rio de La Plata Aibonito
 
Rio Grande de Loiza at Aibonito Rio Grande de Loiza at Caguas Lago Loiza nr Trujillo Alto
 
Rio Piedras at Hato Rey Rio Gurabo

 

Advanced Hydrologic Prediction Services (AHPS)


Flood Threat

 

**En Español**                                                      


000
FLCA42 TJSJ 200910
HWOSJU

Hazardous Weather Outlook
National Weather Service San Juan PR
510 AM AST Fri Sep 20 2019

AMZ710>745-PRZ001>013-210915-
San Juan and Vicinity-Northeast-Southeast-Eastern Interior-
North Central-Central Interior-Ponce and Vicinity-Nortwest-
Western Interior-Mayaguez and Vicinity-Southwest-Culebra-Vieques-
The nearshore and off shore Atlantic and Caribbean Coastal Waters-
510 AM AST Fri Sep 20 2019

This Hazardous Weather Outlook is for Puerto Rico and the adjacent
Atlantic Coastal Waters.

.Day One...Today and Tonight

.Thunderstorms...There is a chance of thunderstorms with heavy
rainfall and brief gusty winds this afternoon across portions of
northwestern Puerto Rico.

.Flooding...Heavy rains could lead to urban and small stream
flooding. There is also the possibility of coastal flooding across the north
coast of Puerto Rico due to a northerly swell causing large breaking
waves.

.Waves...Choppy/Rough seas up to 10 feet expected across most of the
local waters. Large breaking waves of 10 to 15 feet are expected
today across the north shore of Puerto Rico.

.Rip Currents...There is a high risk of rip currents for beaches along
the west, north and northeast coast of Puerto Rico. In addition, high
risk for most of the beaches in Culebra as well as northern Vieques.
Moderate risk of rip currents for southern Vieques and culebra and
the some of the western beaches of Puerto Rico.

.Heat...Daytime high temperatures today will be in the low to mid 90s
across the lower elevations of Puerto Rico, and the heat index values
will be between 100 and 105 degrees.

.Days Two through Seven...Saturday through Thursday

Hazardous marine conditions will continue through the weekend as the
swell associated with Hurricane Jerry invades the local area. The
high risk of rip currents is also expected for the next several days.
Showers and thunderstorms are expected through the upcoming weekend,
which could cause urban and small stream flooding.

.Spotter information statement...

Widespread spotter activation is not anticipated, however individual
spotter are encouraged to report flooding to the National Weather
Service in San Juan.

$$

AMZ715-725-VIZ001-002-210915-
St. Thomas St. John adjacent Islands-St Croix-
Nearshore Atlantic and adjacent Caribbean Coastal Waters-
510 AM AST Fri Sep 20 2019

This Hazardous Weather Outlook is for the U.S. Virgin Islands and the
adjacent Coastal Waters.

.Day One...Today and Tonight

.Waves...Choppy/Rough seas up to 10 feet expected across most of the
local waters. Large breaking waves up to 10 feet are expected today
across the north shore of Saint Thomas.

.Rip Currents...There is a high risk of rip currents for north and
west Saint Thomas as well as northwest Saint Croix. moderate risk for
the rest of Saint Thomas, most of Saint John and all other beaches of
Saint Croix except the south coast.

.Heat...Daytime high temperatures today will be in the low 90s across
the lower elevations of the U.S. Virgin Islands, and the heat index
values will be between 100 and 105 degrees.

.Days Two through Seven...Saturday through Thursday

Hazardous marine conditions will continue through the weekend as the
swell associated with Hurricane Jerry invades the local area. The
high risk of rip currents is also expected for the next several days.
Showers and thunderstorms are expected through the upcoming weekend,
which could cause urban and small stream flooding.

.Spotter information statement...

Widespread spotter activation is not anticipated, however individual
spotter are encouraged to report Rip Currents to the National Weather
Service in San Juan.

$$