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San Juan Radar Outage Impacts Precipitation Estimates.. read more here
Hydrograph River at a Glance Download
Rio De La Plata near Toa Alta Stage (ft)Flow (kcfs)Observed: 5.04 ft at 1:00AM Aug 01, 2020Observed: 5.03 ft at 1:15AM Aug 01, 2020Observed: 5.02 ft at 1:30AM Aug 01, 2020Observed: 5 ft at 1:45AM Aug 01, 2020Observed: 4.99 ft at 2:00AM Aug 01, 2020Observed: 4.98 ft at 2:15AM Aug 01, 2020Observed: 4.96 ft at 2:30AM Aug 01, 2020Observed: 4.95 ft at 2:45AM Aug 01, 2020Observed: 4.94 ft at 3:00AM Aug 01, 2020Observed: 4.92 ft at 3:15AM Aug 01, 2020Observed: 4.91 ft at 3:30AM Aug 01, 2020Observed: 4.9 ft at 3:45AM Aug 01, 2020Observed: 4.89 ft at 4:00AM Aug 01, 2020Observed: 4.87 ft at 4:15AM Aug 01, 2020Observed: 4.86 ft at 4:30AM Aug 01, 2020Observed: 4.86 ft at 4:45AM Aug 01, 2020Observed: 4.84 ft at 5:00AM Aug 01, 2020Observed: 4.84 ft at 5:15AM Aug 01, 2020Observed: 4.83 ft at 5:30AM Aug 01, 2020Observed: 4.82 ft at 5:45AM Aug 01, 2020Observed: 4.81 ft at 6:00AM Aug 01, 2020Observed: 4.8 ft at 6:15AM Aug 01, 2020Observed: 4.79 ft at 6:30AM Aug 01, 2020Observed: 4.78 ft at 6:45AM Aug 01, 2020Observed: 4.79 ft at 6:51AM Aug 01, 2020Observed: 4.77 ft at 7:00AM Aug 01, 2020Observed: 4.77 ft at 7:15AM Aug 01, 2020Observed: 4.77 ft at 7:30AM Aug 01, 2020Observed: 4.76 ft at 7:45AM Aug 01, 2020Observed: 4.75 ft at 8:00AM Aug 01, 2020Observed: 4.75 ft at 8:15AM Aug 01, 2020Observed: 4.74 ft at 8:30AM Aug 01, 2020Observed: 4.74 ft at 8:45AM Aug 01, 2020Observed: 4.74 ft at 9:00AM Aug 01, 2020Observed: 4.74 ft at 9:15AM Aug 01, 2020Observed: 4.74 ft at 9:30AM Aug 01, 2020Observed: 4.74 ft at 9:45AM Aug 01, 2020Observed: 4.74 ft at 10:00AM Aug 01, 2020Observed: 4.75 ft at 10:15AM Aug 01, 2020Observed: 4.75 ft at 10:30AM Aug 01, 2020Observed: 4.77 ft at 10:45AM Aug 01, 2020Observed: 4.78 ft at 11:00AM Aug 01, 2020Observed: 4.78 ft at 11:15AM Aug 01, 2020Observed: 4.79 ft at 11:30AM Aug 01, 2020Observed: 4.8 ft at 11:45AM Aug 01, 2020Observed: 4.8 ft at 12:00PM Aug 01, 2020Observed: 4.82 ft at 12:15PM Aug 01, 2020Observed: 4.83 ft at 12:30PM Aug 01, 2020Observed: 4.83 ft at 12:45PM Aug 01, 2020Observed: 4.85 ft at 1:00PM Aug 01, 2020Observed: 4.85 ft at 1:15PM Aug 01, 2020Observed: 4.86 ft at 1:21PM Aug 01, 2020Observed: 4.87 ft at 1:30PM Aug 01, 2020Observed: 4.87 ft at 1:45PM Aug 01, 2020Observed: 4.87 ft at 2:00PM Aug 01, 2020Observed: 4.87 ft at 2:15PM Aug 01, 2020Observed: 4.88 ft at 2:30PM Aug 01, 2020Observed: 4.89 ft at 2:45PM Aug 01, 2020Observed: 4.9 ft at 3:00PM Aug 01, 2020Observed: 4.91 ft at 3:15PM Aug 01, 2020Observed: 4.93 ft at 3:30PM Aug 01, 2020Observed: 4.96 ft at 3:45PM Aug 01, 2020Observed: 5 ft at 4:00PM Aug 01, 2020Observed: 5.06 ft at 4:15PM Aug 01, 2020Observed: 5.12 ft at 4:30PM Aug 01, 2020Observed: 5.19 ft at 4:45PM Aug 01, 2020Observed: 5.25 ft at 5:00PM Aug 01, 2020Observed: 5.33 ft at 5:15PM Aug 01, 2020Observed: 5.4 ft at 5:30PM Aug 01, 2020Observed: 5.47 ft at 5:45PM Aug 01, 2020Observed: 5.53 ft at 6:00PM Aug 01, 2020Observed: 5.59 ft at 6:15PM Aug 01, 2020Observed: 5.64 ft at 6:30PM Aug 01, 2020Observed: 5.69 ft at 6:45PM Aug 01, 2020Observed: 5.74 ft at 7:00PM Aug 01, 2020Observed: 5.77 ft at 7:15PM Aug 01, 2020Observed: 5.81 ft at 7:30PM Aug 01, 2020Observed: 5.85 ft at 7:45PM Aug 01, 2020Observed: 5.87 ft at 8:00PM Aug 01, 2020Observed: 5.9 ft at 8:15PM Aug 01, 2020Observed: 5.92 ft at 8:30PM Aug 01, 2020Observed: 5.93 ft at 8:45PM Aug 01, 2020Observed: 5.95 ft at 9:00PM Aug 01, 2020Observed: 5.95 ft at 9:15PM Aug 01, 2020Observed: 5.96 ft at 9:20PM Aug 01, 2020Observed: 5.96 ft at 9:30PM Aug 01, 2020Observed: 5.97 ft at 9:45PM Aug 01, 2020Observed: 5.97 ft at 10:00PM Aug 01, 2020Observed: 5.97 ft at 10:15PM Aug 01, 2020Highest Observation: 5.98 ft at 10:30PM Aug 01, 2020Highest Observation: 5.98 ft at 10:45PM Aug 01, 2020Observed: 5.97 ft at 11:00PM Aug 01, 2020Observed: 5.97 ft at 11:15PM Aug 01, 2020Observed: 5.97 ft at 11:30PM Aug 01, 2020Observed: 5.96 ft at 11:45PM Aug 01, 2020Observed: 5.96 ft at 12:00AM Aug 02, 2020Observed: 5.95 ft at 12:15AM Aug 02, 2020Observed: 5.93 ft at 12:30AM Aug 02, 2020Observed: 5.93 ft at 12:45AM Aug 02, 2020Observed: 5.93 ft at 1:00AM Aug 02, 2020Observed: 5.91 ft at 1:15AM Aug 02, 2020Observed: 5.91 ft at 1:30AM Aug 02, 2020Observed: 5.9 ft at 1:45AM Aug 02, 2020Observed: 5.9 ft at 2:00AM Aug 02, 2020Observed: 5.88 ft at 2:15AM Aug 02, 2020Observed: 5.88 ft at 2:30AM Aug 02, 2020Observed: 5.87 ft at 2:45AM Aug 02, 2020Observed: 5.86 ft at 3:00AM Aug 02, 2020Observed: 5.85 ft at 3:15AM Aug 02, 2020Observed: 5.84 ft at 3:30AM Aug 02, 2020Observed: 5.84 ft at 3:45AM Aug 02, 2020Observed: 5.82 ft at 4:00AM Aug 02, 2020Observed: 5.81 ft at 4:15AM Aug 02, 2020Observed: 5.8 ft at 4:30AM Aug 02, 2020Observed: 5.79 ft at 4:45AM Aug 02, 2020Observed: 5.78 ft at 5:00AM Aug 02, 2020Observed: 5.77 ft at 5:15AM Aug 02, 2020Observed: 5.77 ft at 5:20AM Aug 02, 2020Observed: 5.76 ft at 5:30AM Aug 02, 2020Observed: 5.76 ft at 5:45AM Aug 02, 2020Observed: 5.74 ft at 6:00AM Aug 02, 2020Observed: 5.73 ft at 6:15AM Aug 02, 2020Observed: 5.72 ft at 6:30AM Aug 02, 2020Observed: 5.72 ft at 6:45AM Aug 02, 2020Observed: 5.7 ft at 7:00AM Aug 02, 2020Observed: 5.7 ft at 7:15AM Aug 02, 2020Observed: 5.68 ft at 7:30AM Aug 02, 2020Observed: 5.68 ft at 7:45AM Aug 02, 2020Observed: 5.66 ft at 8:00AM Aug 02, 2020Observed: 5.65 ft at 8:15AM Aug 02, 2020Observed: 5.65 ft at 8:30AM Aug 02, 2020Observed: 5.64 ft at 8:45AM Aug 02, 2020Observed: 5.63 ft at 9:00AM Aug 02, 2020Observed: 5.62 ft at 9:15AM Aug 02, 2020Observed: 5.62 ft at 9:30AM Aug 02, 2020Observed: 5.61 ft at 9:45AM Aug 02, 2020Observed: 5.6 ft at 10:00AM Aug 02, 2020Observed: 5.6 ft at 10:15AM Aug 02, 2020Observed: 5.59 ft at 10:30AM Aug 02, 2020Observed: 5.58 ft at 10:45AM Aug 02, 2020Observed: 5.58 ft at 11:00AM Aug 02, 2020Observed: 5.57 ft at 11:15AM Aug 02, 2020Observed: 5.56 ft at 11:30AM Aug 02, 2020Observed: 5.56 ft at 11:45AM Aug 02, 2020Observed: 5.55 ft at 12:00PM Aug 02, 2020Observed: 5.54 ft at 12:15PM Aug 02, 2020Observed: 5.54 ft at 12:30PM Aug 02, 2020Observed: 5.53 ft at 12:45PM Aug 02, 2020Observed: 5.52 ft at 1:00PM Aug 02, 2020Observed: 5.52 ft at 1:15PM Aug 02, 2020Observed: 5.51 ft at 1:26PM Aug 02, 2020Observed: 5.5 ft at 1:30PM Aug 02, 2020Observed: 5.5 ft at 1:45PM Aug 02, 2020Observed: 5.49 ft at 2:00PM Aug 02, 2020Observed: 5.49 ft at 2:15PM Aug 02, 2020Observed: 5.47 ft at 2:30PM Aug 02, 2020Observed: 5.47 ft at 2:45PM Aug 02, 2020Observed: 5.45 ft at 3:00PM Aug 02, 2020Observed: 5.45 ft at 3:15PM Aug 02, 2020Observed: 5.44 ft at 3:30PM Aug 02, 2020Observed: 5.43 ft at 3:45PM Aug 02, 2020Observed: 5.43 ft at 4:00PM Aug 02, 2020Observed: 5.41 ft at 4:15PM Aug 02, 2020Observed: 5.4 ft at 4:30PM Aug 02, 2020Observed: 5.39 ft at 4:45PM Aug 02, 2020Observed: 5.39 ft at 5:00PM Aug 02, 2020Observed: 5.37 ft at 5:15PM Aug 02, 2020Observed: 5.37 ft at 5:30PM Aug 02, 2020Observed: 5.36 ft at 5:45PM Aug 02, 2020Observed: 5.35 ft at 6:00PM Aug 02, 2020Observed: 5.34 ft at 6:15PM Aug 02, 2020Observed: 5.33 ft at 6:30PM Aug 02, 2020Observed: 5.32 ft at 6:45PM Aug 02, 2020Observed: 5.32 ft at 7:00PM Aug 02, 2020Observed: 5.31 ft at 7:15PM Aug 02, 2020Observed: 5.3 ft at 7:30PM Aug 02, 2020Observed: 5.29 ft at 7:45PM Aug 02, 2020Observed: 5.28 ft at 8:00PM Aug 02, 2020Observed: 5.28 ft at 8:15PM Aug 02, 2020Observed: 5.26 ft at 8:30PM Aug 02, 2020Observed: 5.25 ft at 8:45PM Aug 02, 2020Observed: 5.25 ft at 9:00PM Aug 02, 2020Observed: 5.25 ft at 9:15PM Aug 02, 2020Observed: 5.24 ft at 9:26PM Aug 02, 2020Observed: 5.23 ft at 9:30PM Aug 02, 2020Observed: 5.22 ft at 9:45PM Aug 02, 2020Observed: 5.22 ft at 10:00PM Aug 02, 2020Observed: 5.21 ft at 10:15PM Aug 02, 2020Observed: 5.2 ft at 10:30PM Aug 02, 2020Observed: 5.19 ft at 10:45PM Aug 02, 2020Observed: 5.19 ft at 11:00PM Aug 02, 2020Observed: 5.18 ft at 11:15PM Aug 02, 2020Observed: 5.16 ft at 11:30PM Aug 02, 2020Observed: 5.16 ft at 11:45PM Aug 02, 2020Observed: 5.15 ft at 12:00AM Aug 03, 2020Observed: 5.14 ft at 12:15AM Aug 03, 2020Observed: 5.13 ft at 12:30AM Aug 03, 2020Observed: 5.13 ft at 12:45AM Aug 03, 2020Observed: 5.12 ft at 1:00AM Aug 03, 2020Observed: 5.11 ft at 1:15AM Aug 03, 2020Observed: 5.1 ft at 1:30AM Aug 03, 2020Observed: 5.09 ft at 1:45AM Aug 03, 2020Observed: 5.09 ft at 2:00AM Aug 03, 2020Observed: 5.08 ft at 2:15AM Aug 03, 2020Observed: 5.07 ft at 2:30AM Aug 03, 2020Observed: 5.07 ft at 2:45AM Aug 03, 2020Observed: 5.06 ft at 3:00AM Aug 03, 2020Observed: 5.05 ft at 3:15AM Aug 03, 2020Observed: 5.04 ft at 3:30AM Aug 03, 2020Observed: 5.04 ft at 3:45AM Aug 03, 2020Observed: 5.03 ft at 4:00AM Aug 03, 2020Observed: 5.02 ft at 4:15AM Aug 03, 2020Observed: 5.02 ft at 4:30AM Aug 03, 2020Observed: 5.01 ft at 4:45AM Aug 03, 2020Observed: 5.01 ft at 5:00AM Aug 03, 2020Observed: 5 ft at 5:15AM Aug 03, 2020Observed: 5 ft at 5:26AM Aug 03, 2020Observed: 4.99 ft at 5:30AM Aug 03, 2020Observed: 4.98 ft at 5:45AM Aug 03, 2020Observed: 4.98 ft at 6:00AM Aug 03, 2020Observed: 4.97 ft at 6:15AM Aug 03, 2020Observed: 4.96 ft at 6:30AM Aug 03, 2020Observed: 4.96 ft at 6:45AM Aug 03, 2020Observed: 4.95 ft at 7:00AM Aug 03, 2020Observed: 4.95 ft at 7:15AM Aug 03, 2020Observed: 4.94 ft at 7:30AM Aug 03, 2020Observed: 4.94 ft at 7:45AM Aug 03, 2020Observed: 4.93 ft at 8:00AM Aug 03, 2020Observed: 4.92 ft at 8:15AM Aug 03, 2020Observed: 4.92 ft at 8:30AM Aug 03, 2020Observed: 4.91 ft at 8:45AM Aug 03, 2020Observed: 4.9 ft at 9:00AM Aug 03, 2020Observed: 4.9 ft at 9:15AM Aug 03, 2020Observed: 4.89 ft at 9:30AM Aug 03, 2020Observed: 4.89 ft at 9:45AM Aug 03, 2020Observed: 4.88 ft at 10:00AM Aug 03, 2020Observed: 4.88 ft at 10:15AM Aug 03, 2020Observed: 4.87 ft at 10:30AM Aug 03, 2020Observed: 4.87 ft at 10:45AM Aug 03, 2020Observed: 4.86 ft at 11:00AM Aug 03, 2020Observed: 4.86 ft at 11:15AM Aug 03, 2020Observed: 4.86 ft at 11:30AM Aug 03, 2020Observed: 4.85 ft at 11:45AM Aug 03, 2020Observed: 4.84 ft at 12:00PM Aug 03, 2020Observed: 4.84 ft at 12:15PM Aug 03, 2020Observed: 4.84 ft at 12:30PM Aug 03, 2020Observed: 4.83 ft at 12:45PM Aug 03, 2020Observed: 4.83 ft at 1:00PM Aug 03, 2020Observed: 4.83 ft at 1:15PM Aug 03, 2020Observed: 4.83 ft at 1:30PM Aug 03, 2020Observed: 4.83 ft at 1:31PM Aug 03, 2020Observed: 4.83 ft at 1:45PM Aug 03, 2020Observed: 4.82 ft at 2:00PM Aug 03, 2020Observed: 4.83 ft at 2:15PM Aug 03, 2020Observed: 4.82 ft at 2:30PM Aug 03, 2020Observed: 4.82 ft at 2:45PM Aug 03, 2020Observed: 4.82 ft at 3:00PM Aug 03, 2020Observed: 4.81 ft at 3:15PM Aug 03, 2020Observed: 4.81 ft at 3:30PM Aug 03, 2020Observed: 4.8 ft at 3:45PM Aug 03, 2020Observed: 4.79 ft at 4:00PM Aug 03, 2020Observed: 4.78 ft at 4:15PM Aug 03, 2020Observed: 4.78 ft at 4:30PM Aug 03, 2020Observed: 4.77 ft at 4:45PM Aug 03, 2020Observed: 4.76 ft at 5:00PM Aug 03, 2020Observed: 4.75 ft at 5:15PM Aug 03, 2020Observed: 4.74 ft at 5:30PM Aug 03, 2020Observed: 4.72 ft at 5:45PM Aug 03, 2020Observed: 4.72 ft at 6:00PM Aug 03, 2020Observed: 4.71 ft at 6:15PM Aug 03, 2020Observed: 4.71 ft at 6:30PM Aug 03, 2020Observed: 4.7 ft at 6:45PM Aug 03, 2020Observed: 4.7 ft at 7:00PM Aug 03, 2020Observed: 4.69 ft at 7:15PM Aug 03, 2020Observed: 4.69 ft at 7:30PM Aug 03, 2020Observed: 4.68 ft at 7:45PM Aug 03, 2020Observed: 4.68 ft at 8:00PM Aug 03, 2020Observed: 4.67 ft at 8:15PM Aug 03, 2020Observed: 4.66 ft at 8:30PM Aug 03, 2020Observed: 4.65 ft at 8:45PM Aug 03, 2020Observed: 4.65 ft at 9:00PM Aug 03, 2020Observed: 4.65 ft at 9:15PM Aug 03, 2020Observed: 4.64 ft at 9:30PM Aug 03, 2020Observed: 4.64 ft at 9:31PM Aug 03, 2020Observed: 4.63 ft at 9:45PM Aug 03, 2020Observed: 4.63 ft at 10:00PM Aug 03, 2020Observed: 4.62 ft at 10:15PM Aug 03, 2020Observed: 4.61 ft at 10:30PM Aug 03, 2020Observed: 4.61 ft at 10:45PM Aug 03, 2020Observed: 4.6 ft at 11:00PM Aug 03, 2020Observed: 4.6 ft at 11:15PM Aug 03, 2020Observed: 4.59 ft at 11:30PM Aug 03, 2020USGS--Water Resources of the United StatesTOAP4(plotting HGIRG) Graph Created (12:51AM Aug 4, 2020)ObservedLatest observed value: 4.59 ft at 11:30 PM AST 3-Aug-2020. Flood Stage is 16 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Rio De La Plata near Toa Alta. Only observed stages are available for this point.
Return to Area Map
Upstream Gauge - below La Plata Dam Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 23
Moderate Flood Stage: 19
Flood Stage: 16
Action Stage: 8
Low Stage (in feet): 0

Historic Crests
(1) 37.40 ft on 09/13/1928
(2) 36.35 ft on 09/06/1960
(3) 34.40 ft on 06/16/1943
(4) 34.00 ft on 10/09/1970
(5) 33.08 ft on 08/27/1961
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 28.56 ft on 09/20/2017
(2) 18.08 ft on 11/07/2014
(3) 18.47 ft on 10/27/2012
(4) 20.38 ft on 05/08/2012
(5) 21.20 ft on 09/13/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 10.93 ft on 08/09/1974

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:15
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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
22.04 Carr. 2 flooded - Rio Lajas out of its banksBarrio Chorro de Maguayo flooded
18.53 Flooding in: Carr 165, in front of Urb Lagos De Plata, Sector El 26Villa Calma, Urb Las Gaviotas, Mansion del MarIn Dorado: Flooding in Barrio Mameyal, Sector Costa del Oro
About This Location Collapse

Latitude: 18.411389° N, Longitude: 66.260833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 16 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 32.8 ft 48.8 ft  

Current/Historical Observations:
Resources Collapse
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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