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

Hydrograph River at a Glance Download
Lago Loiza near Trujillo Alto Pool (ft)Observed: 131.52 ft at 12:30AM Dec 09, 2017Observed: 131.52 ft at 12:45AM Dec 09, 2017Observed: 131.53 ft at 1:00AM Dec 09, 2017Observed: 131.53 ft at 1:15AM Dec 09, 2017Observed: 131.54 ft at 1:30AM Dec 09, 2017Observed: 131.54 ft at 1:45AM Dec 09, 2017Observed: 131.55 ft at 2:00AM Dec 09, 2017Observed: 131.56 ft at 2:15AM Dec 09, 2017Observed: 131.56 ft at 2:30AM Dec 09, 2017Observed: 131.56 ft at 2:45AM Dec 09, 2017Observed: 131.57 ft at 3:00AM Dec 09, 2017Observed: 131.58 ft at 3:15AM Dec 09, 2017Observed: 131.58 ft at 3:30AM Dec 09, 2017Observed: 131.59 ft at 3:45AM Dec 09, 2017Observed: 131.59 ft at 4:00AM Dec 09, 2017Observed: 131.6 ft at 4:15AM Dec 09, 2017Observed: 131.6 ft at 4:30AM Dec 09, 2017Observed: 131.61 ft at 4:45AM Dec 09, 2017Observed: 131.62 ft at 5:00AM Dec 09, 2017Observed: 131.62 ft at 5:15AM Dec 09, 2017Observed: 131.63 ft at 5:30AM Dec 09, 2017Observed: 131.63 ft at 5:45AM Dec 09, 2017Observed: 131.64 ft at 6:00AM Dec 09, 2017Observed: 131.64 ft at 6:15AM Dec 09, 2017Observed: 131.65 ft at 6:30AM Dec 09, 2017Observed: 131.65 ft at 6:45AM Dec 09, 2017Observed: 131.66 ft at 7:00AM Dec 09, 2017Observed: 131.67 ft at 7:15AM Dec 09, 2017Observed: 131.67 ft at 7:30AM Dec 09, 2017Observed: 131.67 ft at 7:45AM Dec 09, 2017Observed: 131.68 ft at 8:00AM Dec 09, 2017Observed: 131.68 ft at 8:15AM Dec 09, 2017Observed: 131.69 ft at 8:30AM Dec 09, 2017Observed: 131.69 ft at 8:45AM Dec 09, 2017Observed: 131.7 ft at 9:00AM Dec 09, 2017Observed: 131.7 ft at 9:15AM Dec 09, 2017Observed: 131.7 ft at 9:30AM Dec 09, 2017Observed: 131.71 ft at 9:45AM Dec 09, 2017Observed: 131.72 ft at 10:00AM Dec 09, 2017Observed: 131.72 ft at 10:15AM Dec 09, 2017Observed: 131.73 ft at 10:30AM Dec 09, 2017Observed: 131.74 ft at 10:45AM Dec 09, 2017Observed: 131.74 ft at 11:00AM Dec 09, 2017Observed: 131.75 ft at 11:15AM Dec 09, 2017Observed: 131.75 ft at 11:30AM Dec 09, 2017Observed: 131.76 ft at 11:45AM Dec 09, 2017Observed: 131.76 ft at 12:00PM Dec 09, 2017Observed: 131.77 ft at 12:15PM Dec 09, 2017Observed: 131.77 ft at 12:30PM Dec 09, 2017Observed: 131.78 ft at 12:45PM Dec 09, 2017Observed: 131.79 ft at 1:00PM Dec 09, 2017Observed: 131.79 ft at 1:15PM Dec 09, 2017Observed: 131.8 ft at 1:30PM Dec 09, 2017Observed: 131.8 ft at 1:45PM Dec 09, 2017Observed: 131.81 ft at 2:00PM Dec 09, 2017Observed: 131.81 ft at 2:15PM Dec 09, 2017Observed: 131.81 ft at 2:30PM Dec 09, 2017Observed: 131.82 ft at 2:45PM Dec 09, 2017Observed: 131.82 ft at 3:00PM Dec 09, 2017Observed: 131.83 ft at 3:15PM Dec 09, 2017Observed: 131.84 ft at 3:30PM Dec 09, 2017Observed: 131.84 ft at 3:45PM Dec 09, 2017Observed: 131.85 ft at 4:00PM Dec 09, 2017Observed: 131.85 ft at 4:15PM Dec 09, 2017Observed: 131.86 ft at 4:30PM Dec 09, 2017Observed: 131.87 ft at 4:45PM Dec 09, 2017Observed: 131.87 ft at 5:00PM Dec 09, 2017Observed: 131.88 ft at 5:15PM Dec 09, 2017Observed: 131.88 ft at 5:30PM Dec 09, 2017Observed: 131.89 ft at 5:45PM Dec 09, 2017Observed: 131.91 ft at 7:00PM Dec 09, 2017Observed: 131.92 ft at 7:15PM Dec 09, 2017Observed: 131.92 ft at 7:30PM Dec 09, 2017Observed: 131.93 ft at 7:45PM Dec 09, 2017Observed: 131.94 ft at 8:00PM Dec 09, 2017Observed: 131.94 ft at 8:15PM Dec 09, 2017Observed: 131.94 ft at 8:30PM Dec 09, 2017Observed: 131.95 ft at 8:45PM Dec 09, 2017Observed: 131.96 ft at 9:00PM Dec 09, 2017Observed: 131.96 ft at 9:15PM Dec 09, 2017Observed: 131.96 ft at 9:30PM Dec 09, 2017Observed: 131.97 ft at 9:45PM Dec 09, 2017Observed: 131.98 ft at 10:00PM Dec 09, 2017Observed: 131.98 ft at 10:15PM Dec 09, 2017Observed: 131.99 ft at 10:30PM Dec 09, 2017Observed: 131.99 ft at 10:45PM Dec 09, 2017Observed: 131.99 ft at 11:00PM Dec 09, 2017Observed: 132 ft at 11:15PM Dec 09, 2017Observed: 132 ft at 11:30PM Dec 09, 2017Observed: 132.01 ft at 11:45PM Dec 09, 2017Observed: 132.02 ft at 12:00AM Dec 10, 2017Observed: 132.02 ft at 12:15AM Dec 10, 2017Observed: 132.03 ft at 12:30AM Dec 10, 2017Observed: 132.03 ft at 12:45AM Dec 10, 2017Observed: 132.04 ft at 1:00AM Dec 10, 2017Observed: 132.04 ft at 1:15AM Dec 10, 2017Observed: 132.05 ft at 1:30AM Dec 10, 2017Observed: 132.05 ft at 1:45AM Dec 10, 2017Observed: 132.06 ft at 2:00AM Dec 10, 2017Observed: 132.06 ft at 2:15AM Dec 10, 2017Observed: 132.06 ft at 2:30AM Dec 10, 2017Observed: 132.07 ft at 2:45AM Dec 10, 2017Observed: 132.07 ft at 3:00AM Dec 10, 2017Observed: 132.08 ft at 3:15AM Dec 10, 2017Observed: 132.08 ft at 3:30AM Dec 10, 2017Observed: 132.09 ft at 3:45AM Dec 10, 2017Observed: 132.09 ft at 4:00AM Dec 10, 2017Observed: 132.1 ft at 4:15AM Dec 10, 2017Observed: 132.1 ft at 4:30AM Dec 10, 2017Observed: 132.11 ft at 4:45AM Dec 10, 2017Observed: 132.11 ft at 5:00AM Dec 10, 2017Observed: 132.11 ft at 5:15AM Dec 10, 2017Observed: 132.12 ft at 5:30AM Dec 10, 2017Observed: 132.12 ft at 5:45AM Dec 10, 2017Observed: 132.13 ft at 6:00AM Dec 10, 2017Observed: 132.13 ft at 6:15AM Dec 10, 2017Observed: 132.13 ft at 6:30AM Dec 10, 2017Observed: 132.14 ft at 6:45AM Dec 10, 2017Observed: 132.14 ft at 7:00AM Dec 10, 2017Observed: 132.15 ft at 7:15AM Dec 10, 2017Observed: 132.15 ft at 7:30AM Dec 10, 2017Observed: 132.16 ft at 7:45AM Dec 10, 2017Observed: 132.16 ft at 8:00AM Dec 10, 2017Observed: 132.17 ft at 8:15AM Dec 10, 2017Observed: 132.17 ft at 8:30AM Dec 10, 2017Observed: 132.17 ft at 8:45AM Dec 10, 2017Observed: 132.22 ft at 11:00AM Dec 10, 2017Observed: 132.23 ft at 11:15AM Dec 10, 2017Observed: 132.23 ft at 11:30AM Dec 10, 2017Observed: 132.23 ft at 11:45AM Dec 10, 2017Observed: 132.29 ft at 2:00PM Dec 10, 2017Observed: 132.29 ft at 2:15PM Dec 10, 2017Observed: 132.29 ft at 2:30PM Dec 10, 2017Observed: 132.29 ft at 2:45PM Dec 10, 2017Observed: 132.3 ft at 3:00PM Dec 10, 2017Observed: 132.3 ft at 3:15PM Dec 10, 2017Observed: 132.31 ft at 3:30PM Dec 10, 2017Observed: 132.31 ft at 3:45PM Dec 10, 2017Observed: 132.33 ft at 5:00PM Dec 10, 2017Observed: 132.33 ft at 5:15PM Dec 10, 2017Observed: 132.34 ft at 5:30PM Dec 10, 2017Observed: 132.34 ft at 5:45PM Dec 10, 2017Observed: 132.36 ft at 7:00PM Dec 10, 2017Observed: 132.37 ft at 7:15PM Dec 10, 2017Observed: 132.37 ft at 7:30PM Dec 10, 2017Observed: 132.38 ft at 7:45PM Dec 10, 2017Observed: 132.43 ft at 10:00PM Dec 10, 2017Observed: 132.43 ft at 10:15PM Dec 10, 2017Observed: 132.44 ft at 10:30PM Dec 10, 2017Observed: 132.44 ft at 10:45PM Dec 10, 2017Observed: 132.45 ft at 11:00PM Dec 10, 2017Observed: 132.45 ft at 11:15PM Dec 10, 2017Observed: 132.46 ft at 11:30PM Dec 10, 2017Observed: 132.46 ft at 11:45PM Dec 10, 2017Observed: 132.47 ft at 12:00AM Dec 11, 2017Observed: 132.47 ft at 12:15AM Dec 11, 2017Observed: 132.47 ft at 12:30AM Dec 11, 2017Observed: 132.49 ft at 12:45AM Dec 11, 2017Observed: 132.49 ft at 1:00AM Dec 11, 2017Observed: 132.5 ft at 1:15AM Dec 11, 2017Observed: 132.5 ft at 1:30AM Dec 11, 2017Observed: 132.5 ft at 1:45AM Dec 11, 2017Observed: 132.51 ft at 2:00AM Dec 11, 2017Observed: 132.52 ft at 2:15AM Dec 11, 2017Observed: 132.52 ft at 2:30AM Dec 11, 2017Observed: 132.53 ft at 2:45AM Dec 11, 2017Observed: 132.57 ft at 5:00AM Dec 11, 2017Observed: 132.58 ft at 5:15AM Dec 11, 2017Observed: 132.58 ft at 5:30AM Dec 11, 2017Observed: 132.58 ft at 5:45AM Dec 11, 2017Observed: 132.59 ft at 6:00AM Dec 11, 2017Observed: 132.59 ft at 6:15AM Dec 11, 2017Observed: 132.6 ft at 6:30AM Dec 11, 2017Observed: 132.6 ft at 6:45AM Dec 11, 2017Observed: 132.6 ft at 7:00AM Dec 11, 2017Observed: 132.61 ft at 7:15AM Dec 11, 2017Observed: 132.61 ft at 7:30AM Dec 11, 2017Observed: 132.62 ft at 7:45AM Dec 11, 2017Observed: 132.62 ft at 8:00AM Dec 11, 2017Observed: 132.63 ft at 8:15AM Dec 11, 2017Observed: 132.63 ft at 8:30AM Dec 11, 2017Observed: 132.64 ft at 8:45AM Dec 11, 2017Observed: 132.64 ft at 9:00AM Dec 11, 2017Observed: 132.64 ft at 9:15AM Dec 11, 2017Observed: 132.65 ft at 9:30AM Dec 11, 2017Observed: 132.65 ft at 9:45AM Dec 11, 2017Observed: 132.65 ft at 10:00AM Dec 11, 2017Observed: 132.66 ft at 10:15AM Dec 11, 2017Observed: 132.67 ft at 10:30AM Dec 11, 2017Observed: 132.67 ft at 10:45AM Dec 11, 2017Observed: 132.68 ft at 11:00AM Dec 11, 2017Observed: 132.68 ft at 11:15AM Dec 11, 2017Observed: 132.68 ft at 11:30AM Dec 11, 2017Observed: 132.68 ft at 11:45AM Dec 11, 2017Observed: 132.72 ft at 2:00PM Dec 11, 2017Observed: 132.73 ft at 2:15PM Dec 11, 2017Observed: 132.73 ft at 2:30PM Dec 11, 2017Observed: 132.74 ft at 2:45PM Dec 11, 2017Observed: 132.77 ft at 5:00PM Dec 11, 2017Observed: 132.78 ft at 5:15PM Dec 11, 2017Observed: 132.78 ft at 5:30PM Dec 11, 2017Observed: 132.79 ft at 5:45PM Dec 11, 2017Observed: 132.79 ft at 6:00PM Dec 11, 2017Observed: 132.8 ft at 6:15PM Dec 11, 2017Observed: 132.8 ft at 6:30PM Dec 11, 2017Observed: 132.8 ft at 6:45PM Dec 11, 2017Observed: 132.81 ft at 7:00PM Dec 11, 2017Observed: 132.81 ft at 7:15PM Dec 11, 2017Observed: 132.81 ft at 7:30PM Dec 11, 2017Observed: 132.82 ft at 7:45PM Dec 11, 2017Observed: 132.82 ft at 8:00PM Dec 11, 2017Observed: 132.82 ft at 8:15PM Dec 11, 2017Observed: 132.83 ft at 8:30PM Dec 11, 2017Observed: 132.83 ft at 8:45PM Dec 11, 2017Observed: 132.84 ft at 9:00PM Dec 11, 2017Observed: 132.84 ft at 9:15PM Dec 11, 2017Observed: 132.85 ft at 9:30PM Dec 11, 2017Observed: 132.85 ft at 9:45PM Dec 11, 2017Observed: 132.85 ft at 10:00PM Dec 11, 2017Observed: 132.86 ft at 10:15PM Dec 11, 2017Observed: 132.86 ft at 10:30PM Dec 11, 2017Observed: 132.86 ft at 10:45PM Dec 11, 2017Observed: 132.87 ft at 11:00PM Dec 11, 2017Highest Observation: 132.88 ft at 11:15PM Dec 11, 2017Highest Observation: 132.88 ft at 11:30PM Dec 11, 2017Highest Observation: 132.88 ft at 11:45PM Dec 11, 2017USGS--Water Resources of the United StatesPLOP4(plotting HPIRG) Graph Created (12:20AM Dec 12, 2017)ObservedLatest observed value: 132.88 ft at 11:45 PM AST 11-Dec-2017. Flood Stage is 136 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 Lago Loiza near Trujillo Alto. Only observed stages are available for this point.
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Upstream Locations Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 140
Moderate Flood Stage: 138
Flood Stage: 136
Action Stage: 134
Low Stage (in feet): 0

Historic Crests

(P): Preliminary values subject to further review.

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
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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: 18.330278° N, Longitude: 66.016667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 136 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 135 ft 271 ft  

Current/Historical Observations:

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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
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San Juan Weather Forecast Office
4000 Carreterra 190
San Juan, PR 00979
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Page last modified: 21-Dec-2016 10:38 PM
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