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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: 4.37 ft at 6:00AM May 20, 2024Observed: 4.35 ft at 6:15AM May 20, 2024Observed: 4.35 ft at 6:30AM May 20, 2024Observed: 4.34 ft at 6:45AM May 20, 2024Observed: 4.34 ft at 7:00AM May 20, 2024Observed: 4.33 ft at 7:15AM May 20, 2024Observed: 4.33 ft at 7:30AM May 20, 2024Observed: 4.32 ft at 7:45AM May 20, 2024Observed: 4.31 ft at 8:00AM May 20, 2024Observed: 4.31 ft at 8:15AM May 20, 2024Observed: 4.28 ft at 8:30AM May 20, 2024Observed: 4.3 ft at 8:45AM May 20, 2024Observed: 4.31 ft at 9:00AM May 20, 2024Observed: 4.3 ft at 9:15AM May 20, 2024Observed: 4.29 ft at 9:30AM May 20, 2024Observed: 4.3 ft at 9:45AM May 20, 2024Observed: 4.29 ft at 10:00AM May 20, 2024Observed: 4.29 ft at 10:15AM May 20, 2024Observed: 4.29 ft at 10:30AM May 20, 2024Observed: 4.29 ft at 10:45AM May 20, 2024Observed: 4.29 ft at 11:00AM May 20, 2024Observed: 4.29 ft at 11:15AM May 20, 2024Observed: 4.28 ft at 11:30AM May 20, 2024Observed: 4.24 ft at 11:45AM May 20, 2024Observed: 4.26 ft at 12:00PM May 20, 2024Observed: 4.26 ft at 12:15PM May 20, 2024Observed: 4.26 ft at 12:30PM May 20, 2024Observed: 4.26 ft at 12:45PM May 20, 2024Observed: 4.21 ft at 12:50PM May 20, 2024Observed: 4.25 ft at 1:00PM May 20, 2024Observed: 4.25 ft at 1:15PM May 20, 2024Observed: 4.23 ft at 1:30PM May 20, 2024Observed: 4.21 ft at 1:45PM May 20, 2024Observed: 4.2 ft at 2:00PM May 20, 2024Observed: 4.23 ft at 2:15PM May 20, 2024Observed: 4.22 ft at 2:30PM May 20, 2024Observed: 4.17 ft at 2:45PM May 20, 2024Observed: 4.17 ft at 3:00PM May 20, 2024Observed: 4.2 ft at 3:15PM May 20, 2024Observed: 4.17 ft at 3:30PM May 20, 2024Observed: 4.15 ft at 3:45PM May 20, 2024Observed: 4.15 ft at 4:00PM May 20, 2024Observed: 4.16 ft at 4:15PM May 20, 2024Observed: 4.15 ft at 4:30PM May 20, 2024Observed: 4.2 ft at 4:45PM May 20, 2024Observed: 4.19 ft at 5:00PM May 20, 2024Observed: 4.17 ft at 5:15PM May 20, 2024Observed: 4.17 ft at 5:30PM May 20, 2024Observed: 4.16 ft at 5:45PM May 20, 2024Observed: 4.14 ft at 5:55PM May 20, 2024Observed: 4.17 ft at 6:00PM May 20, 2024Observed: 4.17 ft at 6:15PM May 20, 2024Observed: 4.14 ft at 6:30PM May 20, 2024Observed: 4.16 ft at 6:45PM May 20, 2024Observed: 4.14 ft at 7:00PM May 20, 2024Observed: 4.15 ft at 7:15PM May 20, 2024Observed: 4.15 ft at 7:30PM May 20, 2024Observed: 4.15 ft at 7:45PM May 20, 2024Observed: 4.15 ft at 8:00PM May 20, 2024Observed: 4.15 ft at 8:15PM May 20, 2024Observed: 4.15 ft at 8:30PM May 20, 2024Observed: 4.14 ft at 8:45PM May 20, 2024Observed: 4.14 ft at 9:00PM May 20, 2024Observed: 4.14 ft at 9:15PM May 20, 2024Observed: 4.14 ft at 9:30PM May 20, 2024Observed: 4.14 ft at 9:45PM May 20, 2024Observed: 4.14 ft at 10:00PM May 20, 2024Observed: 4.14 ft at 10:15PM May 20, 2024Observed: 4.13 ft at 10:30PM May 20, 2024Observed: 4.14 ft at 10:45PM May 20, 2024Observed: 4.14 ft at 11:00PM May 20, 2024Observed: 4.13 ft at 11:15PM May 20, 2024Observed: 4.13 ft at 11:30PM May 20, 2024Observed: 4.13 ft at 11:45PM May 20, 2024Observed: 4.12 ft at 12:00AM May 21, 2024Observed: 4.13 ft at 12:15AM May 21, 2024Observed: 4.12 ft at 12:30AM May 21, 2024Observed: 4.12 ft at 12:45AM May 21, 2024Observed: 4.12 ft at 1:00AM May 21, 2024Observed: 4.11 ft at 1:15AM May 21, 2024Observed: 4.11 ft at 1:30AM May 21, 2024Observed: 4.11 ft at 1:45AM May 21, 2024Observed: 4.11 ft at 2:00AM May 21, 2024Observed: 4.1 ft at 2:15AM May 21, 2024Observed: 4.1 ft at 2:30AM May 21, 2024Observed: 4.1 ft at 2:45AM May 21, 2024Observed: 4.09 ft at 3:00AM May 21, 2024Observed: 4.09 ft at 3:15AM May 21, 2024Observed: 4.09 ft at 3:30AM May 21, 2024Observed: 4.08 ft at 3:45AM May 21, 2024Observed: 4.09 ft at 4:00AM May 21, 2024Observed: 4.08 ft at 4:15AM May 21, 2024Observed: 4.08 ft at 4:30AM May 21, 2024Observed: 4.08 ft at 4:45AM May 21, 2024Observed: 4.08 ft at 5:00AM May 21, 2024Observed: 4.08 ft at 5:15AM May 21, 2024Observed: 4.08 ft at 5:30AM May 21, 2024Observed: 4.07 ft at 5:45AM May 21, 2024Observed: 4.07 ft at 6:00AM May 21, 2024Observed: 4.07 ft at 6:15AM May 21, 2024Observed: 4.08 ft at 6:30AM May 21, 2024Observed: 4.07 ft at 6:45AM May 21, 2024Observed: 4.08 ft at 7:00AM May 21, 2024Observed: 4.08 ft at 7:15AM May 21, 2024Observed: 4.08 ft at 7:30AM May 21, 2024Observed: 4.08 ft at 7:45AM May 21, 2024Observed: 4.08 ft at 8:00AM May 21, 2024Observed: 4.08 ft at 8:15AM May 21, 2024Observed: 4.08 ft at 8:30AM May 21, 2024Observed: 4.06 ft at 8:45AM May 21, 2024Observed: 4.08 ft at 9:00AM May 21, 2024Observed: 4.05 ft at 9:15AM May 21, 2024Observed: 4.04 ft at 9:30AM May 21, 2024Observed: 4.08 ft at 9:45AM May 21, 2024Observed: 4.07 ft at 10:00AM May 21, 2024Observed: 4.06 ft at 10:15AM May 21, 2024Observed: 4.04 ft at 10:30AM May 21, 2024Observed: 4.06 ft at 10:45AM May 21, 2024Observed: 4.04 ft at 11:00AM May 21, 2024Observed: 4.03 ft at 11:15AM May 21, 2024Observed: 4.03 ft at 11:30AM May 21, 2024Observed: 4.02 ft at 11:45AM May 21, 2024Observed: 4.01 ft at 12:00PM May 21, 2024Observed: 4.01 ft at 12:15PM May 21, 2024Observed: 4.03 ft at 12:30PM May 21, 2024Observed: 4.01 ft at 12:45PM May 21, 2024Observed: 4.01 ft at 1:00PM May 21, 2024Observed: 4.01 ft at 1:15PM May 21, 2024Observed: 4 ft at 1:30PM May 21, 2024Observed: 4.02 ft at 1:45PM May 21, 2024Observed: 4.02 ft at 2:00PM May 21, 2024Observed: 4.06 ft at 2:15PM May 21, 2024Observed: 4.13 ft at 2:30PM May 21, 2024Observed: 4.21 ft at 2:40PM May 21, 2024Observed: 4.27 ft at 2:45PM May 21, 2024Observed: 4.34 ft at 2:50PM May 21, 2024Observed: 4.5 ft at 3:00PM May 21, 2024Observed: 4.6 ft at 3:05PM May 21, 2024Observed: 4.71 ft at 3:10PM May 21, 2024Observed: 4.8 ft at 3:15PM May 21, 2024Observed: 5.15 ft at 3:30PM May 21, 2024Observed: 5.24 ft at 3:35PM May 21, 2024Observed: 5.41 ft at 3:45PM May 21, 2024Observed: 5.51 ft at 3:50PM May 21, 2024Observed: 5.64 ft at 4:00PM May 21, 2024Observed: 5.7 ft at 4:05PM May 21, 2024Observed: 5.78 ft at 4:10PM May 21, 2024Observed: 5.83 ft at 4:15PM May 21, 2024Observed: 5.88 ft at 4:20PM May 21, 2024Observed: 5.98 ft at 4:30PM May 21, 2024Observed: 6.03 ft at 4:35PM May 21, 2024Observed: 6.11 ft at 4:45PM May 21, 2024Observed: 6.24 ft at 5:00PM May 21, 2024Observed: 6.34 ft at 5:10PM May 21, 2024Observed: 6.37 ft at 5:15PM May 21, 2024Observed: 6.46 ft at 5:25PM May 21, 2024Observed: 6.5 ft at 5:30PM May 21, 2024Observed: 6.59 ft at 5:40PM May 21, 2024Observed: 6.64 ft at 5:45PM May 21, 2024Observed: 6.76 ft at 6:00PM May 21, 2024Observed: 6.88 ft at 6:15PM May 21, 2024Observed: 6.99 ft at 6:30PM May 21, 2024Observed: 7.09 ft at 6:45PM May 21, 2024Observed: 7.18 ft at 7:00PM May 21, 2024Observed: 7.25 ft at 7:15PM May 21, 2024Observed: 7.32 ft at 7:30PM May 21, 2024Observed: 7.38 ft at 7:45PM May 21, 2024Observed: 7.4 ft at 8:00PM May 21, 2024Observed: 7.45 ft at 8:15PM May 21, 2024Observed: 7.47 ft at 8:30PM May 21, 2024Observed: 7.5 ft at 8:45PM May 21, 2024Observed: 7.51 ft at 9:00PM May 21, 2024Observed: 7.53 ft at 9:15PM May 21, 2024Observed: 7.53 ft at 9:30PM May 21, 2024Observed: 7.55 ft at 9:45PM May 21, 2024Observed: 7.57 ft at 10:00PM May 21, 2024Observed: 7.58 ft at 10:15PM May 21, 2024Observed: 7.6 ft at 10:30PM May 21, 2024Observed: 7.62 ft at 10:45PM May 21, 2024Observed: 7.62 ft at 11:00PM May 21, 2024Observed: 7.64 ft at 11:15PM May 21, 2024Observed: 7.64 ft at 11:30PM May 21, 2024Observed: 7.65 ft at 11:45PM May 21, 2024Observed: 7.66 ft at 12:00AM May 22, 2024Observed: 7.66 ft at 12:15AM May 22, 2024Observed: 7.68 ft at 12:30AM May 22, 2024Observed: 7.7 ft at 12:45AM May 22, 2024Observed: 7.71 ft at 1:00AM May 22, 2024Observed: 7.73 ft at 1:15AM May 22, 2024Observed: 7.76 ft at 1:30AM May 22, 2024Observed: 7.77 ft at 1:45AM May 22, 2024Observed: 7.78 ft at 2:00AM May 22, 2024Observed: 7.78 ft at 2:15AM May 22, 2024Observed: 7.77 ft at 2:30AM May 22, 2024Observed: 7.79 ft at 2:45AM May 22, 2024Observed: 7.8 ft at 3:00AM May 22, 2024Observed: 7.8 ft at 3:15AM May 22, 2024Observed: 7.82 ft at 3:30AM May 22, 2024Observed: 7.83 ft at 3:45AM May 22, 2024Observed: 7.85 ft at 4:00AM May 22, 2024Observed: 7.85 ft at 4:15AM May 22, 2024Observed: 7.88 ft at 4:30AM May 22, 2024Observed: 7.89 ft at 4:45AM May 22, 2024Highest Observation: 7.9 ft at 5:00AM May 22, 2024Observed: 7.89 ft at 5:15AM May 22, 2024Observed: 7.89 ft at 5:30AM May 22, 2024Observed: 7.87 ft at 5:45AM May 22, 2024Observed: 7.86 ft at 6:00AM May 22, 2024Observed: 7.83 ft at 6:15AM May 22, 2024Observed: 7.84 ft at 6:30AM May 22, 2024Observed: 7.83 ft at 6:45AM May 22, 2024Observed: 7.82 ft at 7:00AM May 22, 2024Observed: 7.8 ft at 7:15AM May 22, 2024Observed: 7.77 ft at 7:30AM May 22, 2024Observed: 7.74 ft at 7:45AM May 22, 2024Observed: 7.68 ft at 8:00AM May 22, 2024Observed: 7.61 ft at 8:15AM May 22, 2024Observed: 7.52 ft at 8:30AM May 22, 2024Observed: 7.43 ft at 8:45AM May 22, 2024Observed: 7.32 ft at 9:00AM May 22, 2024Observed: 7.2 ft at 9:15AM May 22, 2024Observed: 7.11 ft at 9:30AM May 22, 2024Observed: 7.02 ft at 9:40AM May 22, 2024Observed: 6.99 ft at 9:45AM May 22, 2024Observed: 6.88 ft at 10:00AM May 22, 2024Observed: 6.77 ft at 10:15AM May 22, 2024Observed: 6.66 ft at 10:30AM May 22, 2024Observed: 6.56 ft at 10:45AM May 22, 2024Observed: 6.46 ft at 11:00AM May 22, 2024Observed: 6.37 ft at 11:15AM May 22, 2024Observed: 6.28 ft at 11:30AM May 22, 2024Observed: 6.19 ft at 11:45AM May 22, 2024Observed: 6.11 ft at 12:00PM May 22, 2024Observed: 6.04 ft at 12:15PM May 22, 2024Observed: 5.98 ft at 12:30PM May 22, 2024Observed: 5.92 ft at 12:45PM May 22, 2024Observed: 5.86 ft at 1:00PM May 22, 2024Observed: 5.8 ft at 1:15PM May 22, 2024Observed: 5.75 ft at 1:30PM May 22, 2024Observed: 5.71 ft at 1:45PM May 22, 2024Observed: 5.66 ft at 2:00PM May 22, 2024Observed: 5.63 ft at 2:15PM May 22, 2024Observed: 5.59 ft at 2:30PM May 22, 2024Observed: 5.56 ft at 2:45PM May 22, 2024Observed: 5.51 ft at 3:00PM May 22, 2024Observed: 5.47 ft at 3:15PM May 22, 2024Observed: 5.44 ft at 3:30PM May 22, 2024Observed: 5.4 ft at 3:45PM May 22, 2024Observed: 5.37 ft at 4:00PM May 22, 2024Observed: 5.34 ft at 4:15PM May 22, 2024Observed: 5.3 ft at 4:30PM May 22, 2024Observed: 5.27 ft at 4:45PM May 22, 2024Observed: 5.24 ft at 5:00PM May 22, 2024Observed: 5.22 ft at 5:15PM May 22, 2024Observed: 5.19 ft at 5:30PM May 22, 2024Observed: 5.16 ft at 5:45PM May 22, 2024Observed: 5.14 ft at 6:00PM May 22, 2024Observed: 5.12 ft at 6:15PM May 22, 2024Observed: 5.09 ft at 6:30PM May 22, 2024Observed: 5.07 ft at 6:45PM May 22, 2024Observed: 5.05 ft at 7:00PM May 22, 2024Observed: 5.03 ft at 7:15PM May 22, 2024Observed: 5.02 ft at 7:30PM May 22, 2024Observed: 5 ft at 7:45PM May 22, 2024Observed: 4.98 ft at 8:00PM May 22, 2024Observed: 4.96 ft at 8:15PM May 22, 2024Observed: 4.94 ft at 8:30PM May 22, 2024Observed: 4.95 ft at 8:45PM May 22, 2024Observed: 4.95 ft at 9:00PM May 22, 2024Observed: 4.97 ft at 9:15PM May 22, 2024Observed: 4.98 ft at 9:30PM May 22, 2024Observed: 5 ft at 9:45PM May 22, 2024Observed: 5.04 ft at 10:00PM May 22, 2024Observed: 5.13 ft at 10:15PM May 22, 2024Observed: 5.22 ft at 10:25PM May 22, 2024Observed: 5.27 ft at 10:30PM May 22, 2024Observed: 5.32 ft at 10:35PM May 22, 2024Observed: 5.42 ft at 10:45PM May 22, 2024Observed: 5.54 ft at 11:00PM May 22, 2024Observed: 5.62 ft at 11:15PM May 22, 2024Observed: 5.66 ft at 11:30PM May 22, 2024Observed: 5.67 ft at 11:45PM May 22, 2024Observed: 5.68 ft at 12:00AM May 23, 2024Observed: 5.65 ft at 12:15AM May 23, 2024Observed: 5.63 ft at 12:30AM May 23, 2024Observed: 5.61 ft at 12:45AM May 23, 2024Observed: 5.59 ft at 1:00AM May 23, 2024Observed: 5.57 ft at 1:15AM May 23, 2024Observed: 5.55 ft at 1:30AM May 23, 2024Observed: 5.53 ft at 1:45AM May 23, 2024Observed: 5.52 ft at 2:00AM May 23, 2024Observed: 5.49 ft at 2:15AM May 23, 2024Observed: 5.46 ft at 2:30AM May 23, 2024Observed: 5.43 ft at 2:45AM May 23, 2024Observed: 5.41 ft at 3:00AM May 23, 2024Observed: 5.38 ft at 3:15AM May 23, 2024Observed: 5.36 ft at 3:30AM May 23, 2024Observed: 5.33 ft at 3:45AM May 23, 2024Observed: 5.33 ft at 4:00AM May 23, 2024Observed: 5.35 ft at 4:15AM May 23, 2024Observed: 5.41 ft at 4:30AM May 23, 2024Observed: 5.63 ft at 5:00AM May 23, 2024Observed: 5.73 ft at 5:10AM May 23, 2024Observed: 5.79 ft at 5:15AM May 23, 2024Observed: 5.84 ft at 5:20AM May 23, 2024Observed: 5.94 ft at 5:30AM May 23, 2024USGS--Water Resources of the United StatesTOAP4(plotting HGIRG) Graph Created (5:52AM May 23, 2024)ObservedLatest observed value: 5.94 ft at 5:30 AM AST 23-May-2024. Flood Stage is 16 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (AST)
XML Data
RSS Files
Datum: NGVD29
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): -9999

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) 21.95 ft on 04/28/2024 (P)
(2) 17.05 ft on 03/26/2024 (P)
(3) 16.62 ft on 02/07/2024 (P)
(4) 21.95 ft on 04/28/2023 (P)
(5) 16.55 ft on 11/08/2022 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 7.40 ft on 11/19/1993
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: 18.409592° N, Longitude: 66.260571° W, Horizontal Datum: NAD27

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 9.15 25.15 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
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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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Page last modified: 2-Nov-2020 7:30 PM
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