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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of Spring 2024. Existing AHPS content and features will be preserved and expanded within NWPS. The NWS is now accepting feedback on NWPS. Please visit https://www.weather.gov/owp/operations for more information.

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San Juan Radar Outage Impacts Precipitation Estimates.. read more here
Hydrograph River at a Glance Download
Lago Dos Bocas at Arecibo Pool (ft)Observed: 293.23 ft at 5:00AM Dec 03, 2023Observed: 293.24 ft at 5:15AM Dec 03, 2023Observed: 293.25 ft at 5:30AM Dec 03, 2023Observed: 293.25 ft at 5:45AM Dec 03, 2023Observed: 293.26 ft at 6:00AM Dec 03, 2023Observed: 293.26 ft at 6:15AM Dec 03, 2023Observed: 293.26 ft at 6:30AM Dec 03, 2023Observed: 293.27 ft at 6:45AM Dec 03, 2023Observed: 293.28 ft at 7:00AM Dec 03, 2023Observed: 293.28 ft at 7:15AM Dec 03, 2023Observed: 293.28 ft at 7:30AM Dec 03, 2023Observed: 293.29 ft at 7:45AM Dec 03, 2023Observed: 293.3 ft at 8:00AM Dec 03, 2023Observed: 293.31 ft at 8:15AM Dec 03, 2023Observed: 293.3 ft at 8:30AM Dec 03, 2023Observed: 293.31 ft at 8:45AM Dec 03, 2023Observed: 293.31 ft at 9:00AM Dec 03, 2023Observed: 293.32 ft at 9:15AM Dec 03, 2023Observed: 293.33 ft at 9:30AM Dec 03, 2023Observed: 293.33 ft at 9:45AM Dec 03, 2023Observed: 293.34 ft at 10:00AM Dec 03, 2023Observed: 293.35 ft at 10:15AM Dec 03, 2023Observed: 293.35 ft at 10:30AM Dec 03, 2023Observed: 293.36 ft at 10:45AM Dec 03, 2023Observed: 293.36 ft at 11:00AM Dec 03, 2023Observed: 293.37 ft at 11:15AM Dec 03, 2023Observed: 293.38 ft at 11:30AM Dec 03, 2023Observed: 293.37 ft at 11:45AM Dec 03, 2023Observed: 293.35 ft at 12:00PM Dec 03, 2023Observed: 293.35 ft at 12:15PM Dec 03, 2023Observed: 293.33 ft at 12:30PM Dec 03, 2023Observed: 293.38 ft at 12:45PM Dec 03, 2023Observed: 293.4 ft at 1:00PM Dec 03, 2023Observed: 293.39 ft at 1:15PM Dec 03, 2023Observed: 293.37 ft at 1:30PM Dec 03, 2023Observed: 293.36 ft at 1:45PM Dec 03, 2023Observed: 293.35 ft at 2:00PM Dec 03, 2023Observed: 293.4 ft at 2:15PM Dec 03, 2023Observed: 293.38 ft at 2:30PM Dec 03, 2023Observed: 293.41 ft at 2:45PM Dec 03, 2023Observed: 293.39 ft at 3:00PM Dec 03, 2023Observed: 293.41 ft at 3:15PM Dec 03, 2023Observed: 293.38 ft at 3:30PM Dec 03, 2023Observed: 293.41 ft at 3:45PM Dec 03, 2023Observed: 293.47 ft at 4:00PM Dec 03, 2023Observed: 293.48 ft at 4:15PM Dec 03, 2023Observed: 293.49 ft at 4:30PM Dec 03, 2023Observed: 293.49 ft at 4:45PM Dec 03, 2023Observed: 293.48 ft at 5:00PM Dec 03, 2023Observed: 293.49 ft at 5:15PM Dec 03, 2023Observed: 293.49 ft at 5:30PM Dec 03, 2023Highest Observation: 293.53 ft at 5:45PM Dec 03, 2023Observed: 293.52 ft at 6:00PM Dec 03, 2023Observed: 293.52 ft at 6:15PM Dec 03, 2023Observed: 293.45 ft at 6:30PM Dec 03, 2023Observed: 293.48 ft at 6:45PM Dec 03, 2023Observed: 293.43 ft at 7:00PM Dec 03, 2023Observed: 293.41 ft at 7:15PM Dec 03, 2023Observed: 293.36 ft at 7:30PM Dec 03, 2023Observed: 293.27 ft at 7:45PM Dec 03, 2023Observed: 293.25 ft at 8:00PM Dec 03, 2023Observed: 293.21 ft at 8:15PM Dec 03, 2023Observed: 293.14 ft at 8:30PM Dec 03, 2023Observed: 293.05 ft at 8:45PM Dec 03, 2023Observed: 293.04 ft at 9:00PM Dec 03, 2023Observed: 292.98 ft at 9:15PM Dec 03, 2023Observed: 292.96 ft at 9:30PM Dec 03, 2023Observed: 292.9 ft at 9:45PM Dec 03, 2023Observed: 292.98 ft at 10:00PM Dec 03, 2023Observed: 292.91 ft at 10:15PM Dec 03, 2023Observed: 293 ft at 10:30PM Dec 03, 2023Observed: 292.96 ft at 10:45PM Dec 03, 2023Observed: 292.97 ft at 11:00PM Dec 03, 2023Observed: 292.93 ft at 11:15PM Dec 03, 2023Observed: 292.93 ft at 11:30PM Dec 03, 2023Observed: 292.92 ft at 11:45PM Dec 03, 2023Observed: 292.99 ft at 12:00AM Dec 04, 2023Observed: 292.95 ft at 12:15AM Dec 04, 2023Observed: 292.94 ft at 12:30AM Dec 04, 2023Observed: 292.94 ft at 12:45AM Dec 04, 2023Observed: 292.96 ft at 1:00AM Dec 04, 2023Observed: 292.98 ft at 1:15AM Dec 04, 2023Observed: 292.94 ft at 1:30AM Dec 04, 2023Observed: 292.99 ft at 1:45AM Dec 04, 2023Observed: 292.99 ft at 2:00AM Dec 04, 2023Observed: 292.99 ft at 2:15AM Dec 04, 2023Observed: 292.99 ft at 2:30AM Dec 04, 2023Observed: 293.04 ft at 2:45AM Dec 04, 2023Observed: 293.01 ft at 3:00AM Dec 04, 2023Observed: 293.01 ft at 3:15AM Dec 04, 2023Observed: 293.01 ft at 3:30AM Dec 04, 2023Observed: 293.03 ft at 3:45AM Dec 04, 2023Observed: 293.01 ft at 4:00AM Dec 04, 2023Observed: 293.02 ft at 4:15AM Dec 04, 2023Observed: 293.02 ft at 4:30AM Dec 04, 2023Observed: 293.03 ft at 4:45AM Dec 04, 2023Observed: 293.05 ft at 5:00AM Dec 04, 2023Observed: 293.05 ft at 5:15AM Dec 04, 2023Observed: 293.06 ft at 5:30AM Dec 04, 2023Observed: 293.05 ft at 5:45AM Dec 04, 2023Observed: 293.07 ft at 6:00AM Dec 04, 2023Observed: 293.04 ft at 6:15AM Dec 04, 2023Observed: 293.07 ft at 6:30AM Dec 04, 2023Observed: 293.09 ft at 6:45AM Dec 04, 2023Observed: 293.09 ft at 7:00AM Dec 04, 2023Observed: 293.06 ft at 7:15AM Dec 04, 2023Observed: 293.08 ft at 7:30AM Dec 04, 2023Observed: 293.08 ft at 7:45AM Dec 04, 2023Observed: 293.1 ft at 8:00AM Dec 04, 2023Observed: 293.12 ft at 8:15AM Dec 04, 2023Observed: 293.12 ft at 8:30AM Dec 04, 2023Observed: 293.15 ft at 8:45AM Dec 04, 2023Observed: 293.14 ft at 9:00AM Dec 04, 2023Observed: 293.17 ft at 9:15AM Dec 04, 2023Observed: 293.17 ft at 9:30AM Dec 04, 2023Observed: 293.2 ft at 9:45AM Dec 04, 2023Observed: 293.25 ft at 11:00AM Dec 04, 2023Observed: 293.22 ft at 11:15AM Dec 04, 2023Observed: 293.17 ft at 11:30AM Dec 04, 2023Observed: 293.16 ft at 11:45AM Dec 04, 2023Observed: 293.18 ft at 12:00PM Dec 04, 2023Observed: 293.19 ft at 12:15PM Dec 04, 2023Observed: 293.22 ft at 12:30PM Dec 04, 2023Observed: 293.2 ft at 12:45PM Dec 04, 2023Observed: 293.22 ft at 1:00PM Dec 04, 2023Observed: 293.2 ft at 1:15PM Dec 04, 2023Observed: 293.24 ft at 1:30PM Dec 04, 2023Observed: 293.29 ft at 1:45PM Dec 04, 2023Observed: 293.24 ft at 2:00PM Dec 04, 2023Observed: 293.24 ft at 2:15PM Dec 04, 2023Observed: 293.21 ft at 2:30PM Dec 04, 2023Observed: 293.22 ft at 2:45PM Dec 04, 2023Observed: 293.28 ft at 3:00PM Dec 04, 2023Observed: 293.27 ft at 3:15PM Dec 04, 2023Observed: 293.25 ft at 3:30PM Dec 04, 2023Observed: 293.29 ft at 3:45PM Dec 04, 2023Observed: 293.26 ft at 4:00PM Dec 04, 2023Observed: 293.29 ft at 4:15PM Dec 04, 2023Observed: 293.25 ft at 4:30PM Dec 04, 2023Observed: 293.31 ft at 4:45PM Dec 04, 2023Observed: 293.32 ft at 5:00PM Dec 04, 2023Observed: 293.3 ft at 5:15PM Dec 04, 2023Observed: 293.37 ft at 5:30PM Dec 04, 2023Observed: 293.35 ft at 5:45PM Dec 04, 2023Observed: 293.31 ft at 6:00PM Dec 04, 2023Observed: 293.38 ft at 6:15PM Dec 04, 2023Observed: 293.4 ft at 6:30PM Dec 04, 2023Observed: 293.37 ft at 6:45PM Dec 04, 2023Observed: 293.3 ft at 7:00PM Dec 04, 2023Observed: 293.26 ft at 7:15PM Dec 04, 2023Observed: 293.21 ft at 7:30PM Dec 04, 2023Observed: 293.17 ft at 7:45PM Dec 04, 2023Observed: 293.12 ft at 8:00PM Dec 04, 2023Observed: 293.07 ft at 8:15PM Dec 04, 2023Observed: 293.01 ft at 8:30PM Dec 04, 2023Observed: 292.98 ft at 8:45PM Dec 04, 2023Observed: 292.92 ft at 9:00PM Dec 04, 2023Observed: 292.86 ft at 9:15PM Dec 04, 2023Observed: 292.82 ft at 9:30PM Dec 04, 2023Observed: 292.84 ft at 9:45PM Dec 04, 2023Observed: 292.8 ft at 10:00PM Dec 04, 2023Observed: 292.81 ft at 10:15PM Dec 04, 2023Observed: 292.78 ft at 10:30PM Dec 04, 2023Observed: 292.81 ft at 10:45PM Dec 04, 2023Observed: 292.81 ft at 11:00PM Dec 04, 2023Observed: 292.82 ft at 11:15PM Dec 04, 2023Observed: 292.82 ft at 11:30PM Dec 04, 2023Observed: 292.87 ft at 11:45PM Dec 04, 2023Observed: 292.89 ft at 12:00AM Dec 05, 2023Observed: 292.88 ft at 12:15AM Dec 05, 2023Observed: 292.89 ft at 12:30AM Dec 05, 2023Observed: 292.89 ft at 12:45AM Dec 05, 2023Observed: 292.9 ft at 1:00AM Dec 05, 2023Observed: 292.87 ft at 1:15AM Dec 05, 2023Observed: 292.9 ft at 1:30AM Dec 05, 2023Observed: 292.9 ft at 1:45AM Dec 05, 2023Observed: 292.9 ft at 2:00AM Dec 05, 2023Observed: 292.92 ft at 2:15AM Dec 05, 2023Observed: 292.93 ft at 2:30AM Dec 05, 2023Observed: 292.93 ft at 2:45AM Dec 05, 2023Observed: 292.93 ft at 3:00AM Dec 05, 2023Observed: 292.94 ft at 3:15AM Dec 05, 2023Observed: 292.94 ft at 3:30AM Dec 05, 2023Observed: 292.94 ft at 3:45AM Dec 05, 2023Observed: 292.93 ft at 4:00AM Dec 05, 2023Observed: 292.93 ft at 4:15AM Dec 05, 2023Observed: 292.95 ft at 4:30AM Dec 05, 2023Observed: 292.94 ft at 4:45AM Dec 05, 2023Observed: 292.95 ft at 5:00AM Dec 05, 2023Observed: 292.95 ft at 5:15AM Dec 05, 2023Observed: 292.97 ft at 5:30AM Dec 05, 2023Observed: 292.93 ft at 5:45AM Dec 05, 2023Observed: 292.98 ft at 6:00AM Dec 05, 2023Observed: 292.94 ft at 6:15AM Dec 05, 2023Observed: 292.97 ft at 6:30AM Dec 05, 2023Observed: 292.98 ft at 6:45AM Dec 05, 2023Observed: 292.97 ft at 7:00AM Dec 05, 2023Observed: 293 ft at 7:15AM Dec 05, 2023Observed: 292.95 ft at 7:30AM Dec 05, 2023Observed: 292.97 ft at 7:45AM Dec 05, 2023Observed: 292.98 ft at 8:00AM Dec 05, 2023Observed: 292.97 ft at 8:15AM Dec 05, 2023Observed: 293.01 ft at 8:30AM Dec 05, 2023Observed: 293 ft at 8:45AM Dec 05, 2023Observed: 293.04 ft at 9:00AM Dec 05, 2023Observed: 293.06 ft at 9:15AM Dec 05, 2023Observed: 293.08 ft at 9:30AM Dec 05, 2023Observed: 293.05 ft at 9:45AM Dec 05, 2023Observed: 292.99 ft at 10:00AM Dec 05, 2023Observed: 292.98 ft at 10:15AM Dec 05, 2023Observed: 293.03 ft at 10:30AM Dec 05, 2023Observed: 293.03 ft at 10:45AM Dec 05, 2023Observed: 293 ft at 11:00AM Dec 05, 2023Observed: 293.03 ft at 11:15AM Dec 05, 2023Observed: 293.02 ft at 11:30AM Dec 05, 2023Observed: 293.02 ft at 11:45AM Dec 05, 2023Observed: 293.01 ft at 12:00PM Dec 05, 2023Observed: 293.03 ft at 12:15PM Dec 05, 2023Observed: 293.05 ft at 12:30PM Dec 05, 2023Observed: 293.05 ft at 12:45PM Dec 05, 2023Observed: 293.05 ft at 1:00PM Dec 05, 2023Observed: 293.05 ft at 1:15PM Dec 05, 2023Observed: 293.06 ft at 1:30PM Dec 05, 2023Observed: 293.12 ft at 1:45PM Dec 05, 2023Observed: 293.15 ft at 2:00PM Dec 05, 2023Observed: 293.1 ft at 2:15PM Dec 05, 2023Observed: 293.15 ft at 2:30PM Dec 05, 2023Observed: 293.15 ft at 2:45PM Dec 05, 2023Observed: 293.1 ft at 3:00PM Dec 05, 2023Observed: 293.2 ft at 3:15PM Dec 05, 2023Observed: 293.19 ft at 3:30PM Dec 05, 2023Observed: 293.22 ft at 3:45PM Dec 05, 2023Observed: 293.23 ft at 4:00PM Dec 05, 2023Observed: 293.22 ft at 4:15PM Dec 05, 2023Observed: 293.18 ft at 4:30PM Dec 05, 2023Observed: 293.06 ft at 4:45PM Dec 05, 2023Observed: 293.2 ft at 5:00PM Dec 05, 2023Observed: 293.18 ft at 5:15PM Dec 05, 2023Observed: 293.19 ft at 5:30PM Dec 05, 2023Observed: 293.2 ft at 5:45PM Dec 05, 2023Observed: 293.2 ft at 6:00PM Dec 05, 2023Observed: 293.19 ft at 6:15PM Dec 05, 2023Observed: 293.16 ft at 6:30PM Dec 05, 2023Observed: 293.11 ft at 6:45PM Dec 05, 2023Observed: 293.06 ft at 7:00PM Dec 05, 2023Observed: 292.99 ft at 7:15PM Dec 05, 2023Observed: 292.96 ft at 7:30PM Dec 05, 2023Observed: 292.91 ft at 7:45PM Dec 05, 2023Observed: 292.86 ft at 8:00PM Dec 05, 2023Observed: 292.77 ft at 8:15PM Dec 05, 2023Observed: 292.76 ft at 8:30PM Dec 05, 2023Observed: 292.61 ft at 8:45PM Dec 05, 2023Observed: 292.67 ft at 9:00PM Dec 05, 2023Observed: 292.58 ft at 9:15PM Dec 05, 2023Observed: 292.53 ft at 9:30PM Dec 05, 2023Observed: 292.53 ft at 9:45PM Dec 05, 2023Observed: 292.57 ft at 10:00PM Dec 05, 2023Observed: 292.57 ft at 10:15PM Dec 05, 2023Observed: 292.57 ft at 10:30PM Dec 05, 2023Observed: 292.59 ft at 10:45PM Dec 05, 2023Observed: 292.58 ft at 11:00PM Dec 05, 2023Observed: 292.59 ft at 11:15PM Dec 05, 2023Observed: 292.59 ft at 11:30PM Dec 05, 2023Observed: 292.6 ft at 11:45PM Dec 05, 2023Observed: 292.57 ft at 12:00AM Dec 06, 2023Observed: 292.54 ft at 12:15AM Dec 06, 2023Observed: 292.57 ft at 12:30AM Dec 06, 2023Observed: 292.55 ft at 12:45AM Dec 06, 2023Observed: 292.54 ft at 1:00AM Dec 06, 2023Observed: 292.57 ft at 1:15AM Dec 06, 2023Observed: 292.54 ft at 1:30AM Dec 06, 2023Observed: 292.59 ft at 1:45AM Dec 06, 2023Observed: 292.61 ft at 2:00AM Dec 06, 2023Observed: 292.59 ft at 2:15AM Dec 06, 2023Observed: 292.61 ft at 2:30AM Dec 06, 2023Observed: 292.63 ft at 2:45AM Dec 06, 2023Observed: 292.6 ft at 3:00AM Dec 06, 2023Observed: 292.62 ft at 3:15AM Dec 06, 2023Observed: 292.61 ft at 3:30AM Dec 06, 2023Observed: 292.61 ft at 3:45AM Dec 06, 2023USGS--Water Resources of the United StatesARGP4(plotting HPIRG) Graph Created (4:51AM Dec 6, 2023)ObservedLatest observed value: 292.61 ft at 3:45 AM AST 6-Dec-2023. Flood Stage is 297 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the Lago Dos Bocas at Arecibo. Only observed stages are available for this point.
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Upstream Gauge - below Utuado Upstream Gauge Downstream Gauge Downstream Gauge - near San Pedro
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 297
Action Stage: 0
Low Stage (in feet): -9999

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:14
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
About This Location Collapse

Latitude: 18.335439° N, Longitude: 66.666591° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 297 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 327 624 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
San Juan Weather Forecast Office
4000 Carreterra 190
San Juan, PR 00979
(787) 253-4586
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