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San Juan Radar Outage Impacts Precipitation Estimates.. read more here

Hydrograph River at a Glance Download
Rio Grande De Loiza at San Lorenzo Stage (ft)Flow (kcfs)Observed: 8.2 ft at 8:00AM Nov 22, 2020Observed: 8.2 ft at 8:15AM Nov 22, 2020Observed: 8.2 ft at 8:30AM Nov 22, 2020Observed: 8.19 ft at 8:45AM Nov 22, 2020Observed: 8.19 ft at 9:00AM Nov 22, 2020Observed: 8.19 ft at 9:15AM Nov 22, 2020Observed: 8.19 ft at 9:30AM Nov 22, 2020Observed: 8.18 ft at 9:45AM Nov 22, 2020Observed: 8.17 ft at 10:00AM Nov 22, 2020Observed: 8.18 ft at 10:15AM Nov 22, 2020Observed: 8.16 ft at 10:30AM Nov 22, 2020Observed: 8.16 ft at 10:45AM Nov 22, 2020Observed: 8.16 ft at 11:00AM Nov 22, 2020Observed: 8.16 ft at 11:15AM Nov 22, 2020Observed: 8.16 ft at 11:30AM Nov 22, 2020Observed: 8.18 ft at 11:45AM Nov 22, 2020Observed: 8.24 ft at 12:00PM Nov 22, 2020Observed: 8.35 ft at 12:15PM Nov 22, 2020Observed: 8.51 ft at 12:30PM Nov 22, 2020Observed: 8.68 ft at 12:45PM Nov 22, 2020Observed: 9.38 ft at 1:00PM Nov 22, 2020Observed: 9.92 ft at 1:05PM Nov 22, 2020Observed: 10.33 ft at 1:11PM Nov 22, 2020Observed: 10.53 ft at 1:15PM Nov 22, 2020Observed: 10.68 ft at 1:30PM Nov 22, 2020Observed: 10.65 ft at 1:45PM Nov 22, 2020Observed: 10.46 ft at 2:00PM Nov 22, 2020Observed: 10.27 ft at 2:15PM Nov 22, 2020Observed: 10.08 ft at 2:30PM Nov 22, 2020Observed: 9.89 ft at 2:45PM Nov 22, 2020Observed: 9.99 ft at 3:00PM Nov 22, 2020Observed: 9.86 ft at 3:15PM Nov 22, 2020Observed: 9.73 ft at 3:30PM Nov 22, 2020Observed: 9.66 ft at 3:45PM Nov 22, 2020Observed: 9.48 ft at 4:00PM Nov 22, 2020Observed: 9.51 ft at 4:15PM Nov 22, 2020Observed: 9.36 ft at 4:30PM Nov 22, 2020Observed: 9.33 ft at 4:45PM Nov 22, 2020Observed: 9.33 ft at 5:00PM Nov 22, 2020Observed: 9.25 ft at 5:15PM Nov 22, 2020Observed: 9.2 ft at 5:30PM Nov 22, 2020Observed: 9.17 ft at 5:45PM Nov 22, 2020Observed: 9.12 ft at 6:00PM Nov 22, 2020Observed: 9.04 ft at 6:15PM Nov 22, 2020Observed: 9 ft at 6:30PM Nov 22, 2020Observed: 9.02 ft at 6:45PM Nov 22, 2020Observed: 9.01 ft at 7:00PM Nov 22, 2020Observed: 9.04 ft at 7:15PM Nov 22, 2020Observed: 9.08 ft at 7:30PM Nov 22, 2020Observed: 9.1 ft at 7:45PM Nov 22, 2020Observed: 9.11 ft at 8:00PM Nov 22, 2020Observed: 9.12 ft at 8:15PM Nov 22, 2020Observed: 9.11 ft at 8:30PM Nov 22, 2020Observed: 9.06 ft at 8:45PM Nov 22, 2020Observed: 9.01 ft at 9:00PM Nov 22, 2020Observed: 8.98 ft at 9:12PM Nov 22, 2020Observed: 8.97 ft at 9:15PM Nov 22, 2020Observed: 8.96 ft at 9:30PM Nov 22, 2020Observed: 8.9 ft at 9:45PM Nov 22, 2020Observed: 8.87 ft at 10:00PM Nov 22, 2020Observed: 8.87 ft at 10:15PM Nov 22, 2020Observed: 8.83 ft at 10:30PM Nov 22, 2020Observed: 8.81 ft at 10:45PM Nov 22, 2020Observed: 8.82 ft at 11:00PM Nov 22, 2020Observed: 8.88 ft at 11:15PM Nov 22, 2020Observed: 8.99 ft at 11:30PM Nov 22, 2020Observed: 9.31 ft at 11:45PM Nov 22, 2020Observed: 9.63 ft at 12:00AM Nov 23, 2020Observed: 10.05 ft at 12:15AM Nov 23, 2020Observed: 10.25 ft at 12:30AM Nov 23, 2020Observed: 10.44 ft at 12:45AM Nov 23, 2020Observed: 10.54 ft at 1:00AM Nov 23, 2020Observed: 10.47 ft at 1:15AM Nov 23, 2020Observed: 10.36 ft at 1:30AM Nov 23, 2020Observed: 10.58 ft at 1:45AM Nov 23, 2020Observed: 11.22 ft at 2:00AM Nov 23, 2020Observed: 11.48 ft at 2:15AM Nov 23, 2020Observed: 11.62 ft at 2:30AM Nov 23, 2020Observed: 12.08 ft at 2:45AM Nov 23, 2020Observed: 12.27 ft at 3:00AM Nov 23, 2020Observed: 12.51 ft at 3:15AM Nov 23, 2020Observed: 12.38 ft at 3:30AM Nov 23, 2020Observed: 12.55 ft at 3:45AM Nov 23, 2020Observed: 12.59 ft at 4:00AM Nov 23, 2020Observed: 12.92 ft at 4:15AM Nov 23, 2020Highest Observation: 13.55 ft at 4:30AM Nov 23, 2020Observed: 13.52 ft at 4:45AM Nov 23, 2020Observed: 13.15 ft at 5:00AM Nov 23, 2020Observed: 13 ft at 5:11AM Nov 23, 2020Observed: 12.87 ft at 5:15AM Nov 23, 2020Observed: 12.78 ft at 5:30AM Nov 23, 2020Observed: 12.75 ft at 5:45AM Nov 23, 2020Observed: 13.08 ft at 6:00AM Nov 23, 2020Observed: 13.26 ft at 6:15AM Nov 23, 2020Observed: 13.23 ft at 6:30AM Nov 23, 2020Observed: 13.24 ft at 6:45AM Nov 23, 2020Observed: 13.24 ft at 7:00AM Nov 23, 2020Observed: 13.15 ft at 7:15AM Nov 23, 2020Observed: 13.03 ft at 7:30AM Nov 23, 2020Observed: 12.79 ft at 7:45AM Nov 23, 2020Observed: 12.47 ft at 8:00AM Nov 23, 2020Observed: 12.17 ft at 8:15AM Nov 23, 2020Observed: 11.85 ft at 8:30AM Nov 23, 2020Observed: 11.54 ft at 8:45AM Nov 23, 2020Observed: 11.46 ft at 9:00AM Nov 23, 2020Observed: 11.07 ft at 9:15AM Nov 23, 2020Observed: 10.96 ft at 9:30AM Nov 23, 2020Observed: 10.85 ft at 9:45AM Nov 23, 2020Observed: 10.72 ft at 10:00AM Nov 23, 2020Observed: 10.58 ft at 10:15AM Nov 23, 2020Observed: 10.14 ft at 11:30AM Nov 23, 2020Observed: 10.07 ft at 11:45AM Nov 23, 2020Observed: 9.9 ft at 12:00PM Nov 23, 2020Observed: 9.91 ft at 12:15PM Nov 23, 2020Observed: 9.83 ft at 12:30PM Nov 23, 2020Observed: 9.78 ft at 12:45PM Nov 23, 2020Observed: 9.73 ft at 1:00PM Nov 23, 2020Observed: 9.68 ft at 1:12PM Nov 23, 2020Observed: 9.66 ft at 1:15PM Nov 23, 2020Observed: 9.59 ft at 1:30PM Nov 23, 2020Observed: 9.52 ft at 1:45PM Nov 23, 2020Observed: 9.48 ft at 2:00PM Nov 23, 2020Observed: 9.46 ft at 2:15PM Nov 23, 2020Observed: 9.35 ft at 2:30PM Nov 23, 2020Observed: 9.37 ft at 2:45PM Nov 23, 2020Observed: 9.34 ft at 3:00PM Nov 23, 2020Observed: 9.33 ft at 3:15PM Nov 23, 2020Observed: 9.27 ft at 3:30PM Nov 23, 2020Observed: 9.24 ft at 3:45PM Nov 23, 2020Observed: 9.16 ft at 4:00PM Nov 23, 2020Observed: 9.2 ft at 4:15PM Nov 23, 2020Observed: 9.15 ft at 4:30PM Nov 23, 2020Observed: 9.14 ft at 4:45PM Nov 23, 2020Observed: 9.04 ft at 5:00PM Nov 23, 2020Observed: 9.06 ft at 5:15PM Nov 23, 2020Observed: 9.04 ft at 5:30PM Nov 23, 2020Observed: 9.03 ft at 5:45PM Nov 23, 2020Observed: 9 ft at 6:00PM Nov 23, 2020Observed: 8.98 ft at 6:15PM Nov 23, 2020Observed: 8.94 ft at 6:30PM Nov 23, 2020Observed: 8.93 ft at 6:45PM Nov 23, 2020Observed: 8.93 ft at 7:00PM Nov 23, 2020Observed: 8.91 ft at 7:15PM Nov 23, 2020Observed: 8.89 ft at 7:30PM Nov 23, 2020Observed: 8.88 ft at 7:45PM Nov 23, 2020Observed: 8.87 ft at 8:00PM Nov 23, 2020Observed: 8.85 ft at 8:15PM Nov 23, 2020Observed: 8.84 ft at 8:30PM Nov 23, 2020Observed: 8.84 ft at 8:45PM Nov 23, 2020Observed: 8.81 ft at 9:00PM Nov 23, 2020Observed: 8.78 ft at 9:15PM Nov 23, 2020Observed: 8.78 ft at 9:17PM Nov 23, 2020Observed: 8.78 ft at 9:30PM Nov 23, 2020Observed: 8.77 ft at 9:45PM Nov 23, 2020Observed: 8.76 ft at 10:00PM Nov 23, 2020Observed: 8.75 ft at 10:15PM Nov 23, 2020Observed: 8.74 ft at 10:30PM Nov 23, 2020Observed: 8.73 ft at 10:45PM Nov 23, 2020Observed: 8.73 ft at 11:00PM Nov 23, 2020Observed: 8.71 ft at 11:15PM Nov 23, 2020Observed: 8.7 ft at 11:30PM Nov 23, 2020Observed: 8.7 ft at 11:45PM Nov 23, 2020Observed: 8.68 ft at 12:00AM Nov 24, 2020Observed: 8.68 ft at 12:15AM Nov 24, 2020Observed: 8.68 ft at 12:30AM Nov 24, 2020Observed: 8.67 ft at 12:45AM Nov 24, 2020Observed: 8.67 ft at 1:00AM Nov 24, 2020Observed: 8.67 ft at 1:15AM Nov 24, 2020Observed: 8.65 ft at 1:30AM Nov 24, 2020Observed: 8.64 ft at 1:45AM Nov 24, 2020Observed: 8.63 ft at 2:00AM Nov 24, 2020Observed: 8.62 ft at 2:15AM Nov 24, 2020Observed: 8.63 ft at 2:30AM Nov 24, 2020Observed: 8.62 ft at 2:45AM Nov 24, 2020Observed: 8.62 ft at 3:00AM Nov 24, 2020Observed: 8.61 ft at 3:15AM Nov 24, 2020Observed: 8.6 ft at 3:30AM Nov 24, 2020Observed: 8.59 ft at 3:45AM Nov 24, 2020Observed: 8.59 ft at 4:00AM Nov 24, 2020Observed: 8.58 ft at 4:15AM Nov 24, 2020Observed: 8.58 ft at 4:30AM Nov 24, 2020Observed: 8.58 ft at 4:45AM Nov 24, 2020Observed: 8.57 ft at 5:00AM Nov 24, 2020Observed: 8.56 ft at 5:15AM Nov 24, 2020Observed: 8.56 ft at 5:16AM Nov 24, 2020Observed: 8.56 ft at 5:30AM Nov 24, 2020Observed: 8.55 ft at 5:45AM Nov 24, 2020Observed: 8.55 ft at 6:00AM Nov 24, 2020Observed: 8.54 ft at 6:15AM Nov 24, 2020Observed: 8.54 ft at 6:30AM Nov 24, 2020Observed: 8.54 ft at 6:45AM Nov 24, 2020Observed: 8.53 ft at 7:00AM Nov 24, 2020Observed: 8.52 ft at 7:15AM Nov 24, 2020Observed: 8.52 ft at 7:30AM Nov 24, 2020Observed: 8.51 ft at 7:45AM Nov 24, 2020Observed: 8.5 ft at 8:00AM Nov 24, 2020Observed: 8.5 ft at 8:15AM Nov 24, 2020Observed: 8.5 ft at 8:30AM Nov 24, 2020Observed: 8.5 ft at 8:45AM Nov 24, 2020Observed: 8.48 ft at 9:00AM Nov 24, 2020Observed: 8.48 ft at 9:15AM Nov 24, 2020Observed: 8.49 ft at 9:30AM Nov 24, 2020Observed: 8.47 ft at 9:45AM Nov 24, 2020Observed: 8.47 ft at 10:00AM Nov 24, 2020Observed: 8.47 ft at 10:15AM Nov 24, 2020Observed: 8.45 ft at 10:30AM Nov 24, 2020Observed: 8.46 ft at 10:45AM Nov 24, 2020Observed: 8.46 ft at 11:00AM Nov 24, 2020Observed: 8.45 ft at 11:15AM Nov 24, 2020Observed: 8.44 ft at 11:30AM Nov 24, 2020Observed: 8.44 ft at 11:45AM Nov 24, 2020Observed: 8.44 ft at 12:00PM Nov 24, 2020Observed: 8.44 ft at 12:15PM Nov 24, 2020Observed: 8.43 ft at 12:30PM Nov 24, 2020Observed: 8.42 ft at 12:45PM Nov 24, 2020Observed: 8.42 ft at 1:00PM Nov 24, 2020Observed: 8.41 ft at 1:15PM Nov 24, 2020Observed: 8.43 ft at 1:30PM Nov 24, 2020Observed: 8.42 ft at 1:45PM Nov 24, 2020Observed: 8.4 ft at 2:00PM Nov 24, 2020Observed: 8.4 ft at 2:15PM Nov 24, 2020Observed: 8.39 ft at 2:30PM Nov 24, 2020Observed: 8.4 ft at 2:45PM Nov 24, 2020Observed: 8.39 ft at 3:00PM Nov 24, 2020Observed: 8.38 ft at 3:15PM Nov 24, 2020Observed: 8.38 ft at 3:30PM Nov 24, 2020Observed: 8.37 ft at 3:45PM Nov 24, 2020Observed: 8.38 ft at 4:00PM Nov 24, 2020Observed: 8.38 ft at 4:15PM Nov 24, 2020Observed: 8.37 ft at 4:30PM Nov 24, 2020Observed: 8.36 ft at 4:45PM Nov 24, 2020Observed: 8.36 ft at 5:00PM Nov 24, 2020Observed: 8.36 ft at 5:15PM Nov 24, 2020Observed: 8.36 ft at 5:30PM Nov 24, 2020Observed: 8.36 ft at 5:45PM Nov 24, 2020Observed: 8.35 ft at 6:00PM Nov 24, 2020Observed: 8.35 ft at 6:15PM Nov 24, 2020Observed: 8.35 ft at 6:30PM Nov 24, 2020Observed: 8.35 ft at 6:45PM Nov 24, 2020Observed: 8.34 ft at 7:00PM Nov 24, 2020Observed: 8.34 ft at 7:15PM Nov 24, 2020Observed: 8.34 ft at 7:30PM Nov 24, 2020Observed: 8.35 ft at 7:45PM Nov 24, 2020Observed: 8.35 ft at 8:00PM Nov 24, 2020Observed: 8.35 ft at 8:15PM Nov 24, 2020Observed: 8.35 ft at 8:30PM Nov 24, 2020Observed: 8.35 ft at 8:45PM Nov 24, 2020Observed: 8.35 ft at 9:00PM Nov 24, 2020Observed: 8.34 ft at 9:15PM Nov 24, 2020Observed: 8.35 ft at 9:21PM Nov 24, 2020Observed: 8.34 ft at 9:30PM Nov 24, 2020Observed: 8.36 ft at 9:45PM Nov 24, 2020Observed: 8.35 ft at 10:00PM Nov 24, 2020Observed: 8.35 ft at 10:15PM Nov 24, 2020Observed: 8.34 ft at 10:30PM Nov 24, 2020Observed: 8.33 ft at 10:45PM Nov 24, 2020Observed: 8.34 ft at 11:00PM Nov 24, 2020Observed: 8.34 ft at 11:15PM Nov 24, 2020Observed: 8.34 ft at 11:30PM Nov 24, 2020Observed: 8.33 ft at 11:45PM Nov 24, 2020Observed: 8.33 ft at 12:00AM Nov 25, 2020Observed: 8.32 ft at 12:15AM Nov 25, 2020Observed: 8.33 ft at 12:30AM Nov 25, 2020Observed: 8.33 ft at 12:45AM Nov 25, 2020Observed: 8.33 ft at 1:00AM Nov 25, 2020Observed: 8.32 ft at 1:15AM Nov 25, 2020Observed: 8.32 ft at 1:30AM Nov 25, 2020Observed: 8.32 ft at 1:45AM Nov 25, 2020Observed: 8.31 ft at 2:00AM Nov 25, 2020Observed: 8.31 ft at 2:15AM Nov 25, 2020Observed: 8.31 ft at 2:30AM Nov 25, 2020Observed: 8.31 ft at 2:45AM Nov 25, 2020Observed: 8.31 ft at 3:00AM Nov 25, 2020Observed: 8.3 ft at 3:15AM Nov 25, 2020Observed: 8.3 ft at 3:30AM Nov 25, 2020Observed: 8.3 ft at 3:45AM Nov 25, 2020Observed: 8.3 ft at 4:00AM Nov 25, 2020Observed: 8.29 ft at 4:15AM Nov 25, 2020Observed: 8.29 ft at 4:30AM Nov 25, 2020Observed: 8.29 ft at 4:45AM Nov 25, 2020Observed: 8.29 ft at 5:00AM Nov 25, 2020Observed: 8.29 ft at 5:15AM Nov 25, 2020Observed: 8.28 ft at 5:21AM Nov 25, 2020Observed: 8.29 ft at 5:30AM Nov 25, 2020Observed: 8.29 ft at 5:45AM Nov 25, 2020Observed: 8.29 ft at 6:00AM Nov 25, 2020Observed: 8.28 ft at 6:15AM Nov 25, 2020Observed: 8.29 ft at 6:30AM Nov 25, 2020Observed: 8.28 ft at 6:45AM Nov 25, 2020Observed: 8.28 ft at 7:00AM Nov 25, 2020Observed: 8.29 ft at 7:15AM Nov 25, 2020USGS--Water Resources of the United StatesSLNP4(plotting HGIRG) Graph Created (7:51AM Nov 25, 2020)ObservedLatest observed value: 8.29 ft at 7:15 AM AST 25-Nov-2020. Flood Stage is 14 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge readings inaccurate - awaiting repair.

NOTE: Forecasts are not available for the Rio Grande De Loiza at San Lorenzo. Only observed stages are available for this point.

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Downstream Gauge Downstream Gauge - at Caguas
Flood Categories (in feet)
Major Flood Stage: 28
Moderate Flood Stage: 21
Flood Stage: 14
Action Stage: 11
Low Stage (in feet): 0

Historic Crests
(1) 35.62 ft on 09/10/1996
(2) 31.37 ft on 01/05/1992
(3) 30.14 ft on 09/21/1998
(4) 26.74 ft on 09/15/2004
(5) 24.50 ft on 09/21/2008
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 24.18 ft on 09/20/2017
(2) 18.09 ft on 10/25/2015
(3) 13.66 ft on 11/07/2014
(4) 15.71 ft on 08/22/2014
(5) 14.31 ft on 09/08/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

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: 18.185833° N, Longitude: 65.961667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 14 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 263.16 ft 277.16 ft  

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: 30-Oct-2020 4:10 PM
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