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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 March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

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San Juan Radar Outage Impacts Precipitation Estimates.. read more here
Hydrograph River at a Glance Download
Rio Loco at Las Latas Stage (ft)Observed: 2.72 ft at 4:30AM Sep 29, 2023Observed: 2.71 ft at 4:45AM Sep 29, 2023Observed: 2.7 ft at 5:00AM Sep 29, 2023Observed: 2.7 ft at 5:15AM Sep 29, 2023Observed: 2.69 ft at 5:30AM Sep 29, 2023Observed: 2.7 ft at 5:45AM Sep 29, 2023Observed: 2.68 ft at 6:00AM Sep 29, 2023Observed: 2.66 ft at 6:15AM Sep 29, 2023Observed: 2.65 ft at 6:30AM Sep 29, 2023Observed: 2.67 ft at 6:45AM Sep 29, 2023Observed: 2.66 ft at 7:00AM Sep 29, 2023Observed: 2.66 ft at 7:11AM Sep 29, 2023Observed: 2.66 ft at 7:15AM Sep 29, 2023Observed: 2.68 ft at 7:30AM Sep 29, 2023Observed: 2.71 ft at 7:45AM Sep 29, 2023Observed: 2.7 ft at 8:00AM Sep 29, 2023Observed: 2.69 ft at 8:15AM Sep 29, 2023Observed: 2.68 ft at 8:30AM Sep 29, 2023Observed: 2.67 ft at 8:45AM Sep 29, 2023Observed: 2.65 ft at 9:15AM Sep 29, 2023Observed: 2.65 ft at 9:30AM Sep 29, 2023Observed: 2.64 ft at 9:45AM Sep 29, 2023Observed: 2.64 ft at 10:00AM Sep 29, 2023Observed: 2.62 ft at 10:15AM Sep 29, 2023Observed: 2.62 ft at 10:30AM Sep 29, 2023Observed: 2.62 ft at 10:45AM Sep 29, 2023Observed: 3.12 ft at 11:00AM Sep 29, 2023Observed: 3.43 ft at 11:15AM Sep 29, 2023Observed: 3.65 ft at 11:40AM Sep 29, 2023Observed: 3.76 ft at 11:56AM Sep 29, 2023Observed: 3.78 ft at 12:01PM Sep 29, 2023Observed: 3.86 ft at 12:16PM Sep 29, 2023Observed: 3.88 ft at 12:20PM Sep 29, 2023Observed: 3.93 ft at 12:30PM Sep 29, 2023Observed: 3.96 ft at 12:41PM Sep 29, 2023Observed: 3.97 ft at 12:45PM Sep 29, 2023Observed: 4.01 ft at 1:00PM Sep 29, 2023Observed: 4.05 ft at 1:15PM Sep 29, 2023Observed: 4.06 ft at 1:26PM Sep 29, 2023Observed: 4.07 ft at 1:30PM Sep 29, 2023Observed: 4.08 ft at 1:46PM Sep 29, 2023Observed: 4.1 ft at 1:51PM Sep 29, 2023Observed: 4.12 ft at 2:00PM Sep 29, 2023Observed: 4.13 ft at 2:15PM Sep 29, 2023Observed: 4.18 ft at 2:30PM Sep 29, 2023Observed: 4.16 ft at 2:40PM Sep 29, 2023Observed: 4.17 ft at 2:45PM Sep 29, 2023Observed: 4.17 ft at 2:46PM Sep 29, 2023Observed: 4.2 ft at 3:00PM Sep 29, 2023Observed: 4.2 ft at 3:15PM Sep 29, 2023Observed: 4.22 ft at 3:30PM Sep 29, 2023Observed: 4.2 ft at 3:45PM Sep 29, 2023Observed: 4.25 ft at 4:00PM Sep 29, 2023Observed: 4.24 ft at 4:15PM Sep 29, 2023Observed: 4.25 ft at 4:30PM Sep 29, 2023Observed: 4.26 ft at 4:45PM Sep 29, 2023Observed: 4.25 ft at 5:00PM Sep 29, 2023Observed: 4.26 ft at 5:15PM Sep 29, 2023Observed: 4.28 ft at 5:30PM Sep 29, 2023Observed: 4.29 ft at 5:45PM Sep 29, 2023Observed: 4.26 ft at 6:00PM Sep 29, 2023Observed: 4.29 ft at 6:15PM Sep 29, 2023Observed: 4.3 ft at 6:30PM Sep 29, 2023Observed: 4.3 ft at 6:45PM Sep 29, 2023Observed: 4.47 ft at 7:00PM Sep 29, 2023Highest Observation: 4.58 ft at 7:15PM Sep 29, 2023Observed: 4.38 ft at 7:30PM Sep 29, 2023Observed: 4.17 ft at 7:45PM Sep 29, 2023Observed: 4.03 ft at 8:00PM Sep 29, 2023Observed: 3.93 ft at 8:15PM Sep 29, 2023Observed: 3.82 ft at 8:30PM Sep 29, 2023Observed: 3.73 ft at 8:45PM Sep 29, 2023Observed: 3.64 ft at 9:00PM Sep 29, 2023Observed: 3.64 ft at 9:15PM Sep 29, 2023Observed: 3.6 ft at 9:30PM Sep 29, 2023Observed: 3.58 ft at 9:45PM Sep 29, 2023Observed: 3.54 ft at 10:00PM Sep 29, 2023Observed: 3.5 ft at 10:15PM Sep 29, 2023Observed: 3.45 ft at 10:30PM Sep 29, 2023Observed: 3.41 ft at 10:45PM Sep 29, 2023Observed: 3.41 ft at 10:46PM Sep 29, 2023Observed: 3.42 ft at 11:00PM Sep 29, 2023Observed: 3.42 ft at 11:15PM Sep 29, 2023Observed: 3.39 ft at 11:30PM Sep 29, 2023Observed: 3.33 ft at 11:45PM Sep 29, 2023Observed: 3.31 ft at 12:00AM Sep 30, 2023Observed: 3.31 ft at 12:05AM Sep 30, 2023Observed: 3.27 ft at 12:15AM Sep 30, 2023Observed: 3.26 ft at 12:30AM Sep 30, 2023Observed: 3.23 ft at 12:45AM Sep 30, 2023Observed: 3.21 ft at 1:00AM Sep 30, 2023Observed: 3.16 ft at 1:15AM Sep 30, 2023Observed: 3.13 ft at 1:30AM Sep 30, 2023Observed: 3.09 ft at 1:45AM Sep 30, 2023Observed: 3.07 ft at 2:00AM Sep 30, 2023Observed: 3.04 ft at 2:15AM Sep 30, 2023Observed: 2.99 ft at 2:30AM Sep 30, 2023Observed: 3 ft at 2:45AM Sep 30, 2023Observed: 2.98 ft at 3:00AM Sep 30, 2023Observed: 2.95 ft at 3:15AM Sep 30, 2023Observed: 2.94 ft at 3:30AM Sep 30, 2023Observed: 2.94 ft at 3:45AM Sep 30, 2023Observed: 2.9 ft at 4:00AM Sep 30, 2023Observed: 2.91 ft at 4:05AM Sep 30, 2023Observed: 2.89 ft at 4:15AM Sep 30, 2023Observed: 2.88 ft at 4:30AM Sep 30, 2023Observed: 2.87 ft at 4:45AM Sep 30, 2023Observed: 2.86 ft at 5:00AM Sep 30, 2023Observed: 2.83 ft at 5:15AM Sep 30, 2023Observed: 2.81 ft at 5:30AM Sep 30, 2023Observed: 2.8 ft at 5:45AM Sep 30, 2023Observed: 2.8 ft at 6:00AM Sep 30, 2023Observed: 2.81 ft at 6:15AM Sep 30, 2023Observed: 2.81 ft at 6:30AM Sep 30, 2023Observed: 2.79 ft at 6:45AM Sep 30, 2023Observed: 2.78 ft at 7:00AM Sep 30, 2023Observed: 2.79 ft at 7:15AM Sep 30, 2023Observed: 2.79 ft at 7:30AM Sep 30, 2023Observed: 2.79 ft at 7:45AM Sep 30, 2023Observed: 2.78 ft at 8:00AM Sep 30, 2023Observed: 2.77 ft at 8:15AM Sep 30, 2023Observed: 2.76 ft at 8:30AM Sep 30, 2023Observed: 2.76 ft at 8:45AM Sep 30, 2023Observed: 2.76 ft at 9:00AM Sep 30, 2023Observed: 2.74 ft at 9:15AM Sep 30, 2023Observed: 2.74 ft at 9:30AM Sep 30, 2023Observed: 2.74 ft at 9:45AM Sep 30, 2023Observed: 2.74 ft at 10:00AM Sep 30, 2023Observed: 2.73 ft at 10:15AM Sep 30, 2023Observed: 2.73 ft at 10:30AM Sep 30, 2023Observed: 2.88 ft at 10:45AM Sep 30, 2023Observed: 3.33 ft at 11:00AM Sep 30, 2023Observed: 3.53 ft at 11:15AM Sep 30, 2023Observed: 3.68 ft at 11:30AM Sep 30, 2023Observed: 3.78 ft at 11:45AM Sep 30, 2023Observed: 3.86 ft at 12:00PM Sep 30, 2023Observed: 3.89 ft at 12:05PM Sep 30, 2023Observed: 4.03 ft at 12:46PM Sep 30, 2023Observed: 4.05 ft at 12:55PM Sep 30, 2023Observed: 3.98 ft at 1:10PM Sep 30, 2023Observed: 3.98 ft at 1:15PM Sep 30, 2023Observed: 3.98 ft at 1:16PM Sep 30, 2023Observed: 3.94 ft at 1:30PM Sep 30, 2023Observed: 3.88 ft at 1:45PM Sep 30, 2023Observed: 3.85 ft at 1:51PM Sep 30, 2023Observed: 3.81 ft at 2:00PM Sep 30, 2023Observed: 3.78 ft at 2:15PM Sep 30, 2023Observed: 3.77 ft at 2:20PM Sep 30, 2023Observed: 3.72 ft at 2:30PM Sep 30, 2023Observed: 3.72 ft at 2:35PM Sep 30, 2023Observed: 3.69 ft at 2:45PM Sep 30, 2023Observed: 3.65 ft at 3:00PM Sep 30, 2023Observed: 3.65 ft at 3:01PM Sep 30, 2023Observed: 3.64 ft at 3:05PM Sep 30, 2023Observed: 3.62 ft at 3:15PM Sep 30, 2023Observed: 3.57 ft at 3:30PM Sep 30, 2023Observed: 3.59 ft at 3:45PM Sep 30, 2023Observed: 3.67 ft at 4:00PM Sep 30, 2023Observed: 3.79 ft at 4:15PM Sep 30, 2023Observed: 3.89 ft at 4:30PM Sep 30, 2023Observed: 3.96 ft at 4:45PM Sep 30, 2023Observed: 4.05 ft at 5:00PM Sep 30, 2023Observed: 4.11 ft at 5:15PM Sep 30, 2023Observed: 4.12 ft at 5:30PM Sep 30, 2023Observed: 4.18 ft at 5:45PM Sep 30, 2023Observed: 4.23 ft at 6:00PM Sep 30, 2023Observed: 4.25 ft at 6:15PM Sep 30, 2023Observed: 4.26 ft at 6:30PM Sep 30, 2023Observed: 4.28 ft at 6:45PM Sep 30, 2023Observed: 4.3 ft at 7:00PM Sep 30, 2023Observed: 4.28 ft at 7:15PM Sep 30, 2023Observed: 4.2 ft at 7:30PM Sep 30, 2023Observed: 4.05 ft at 7:45PM Sep 30, 2023Observed: 3.96 ft at 7:55PM Sep 30, 2023Observed: 3.91 ft at 8:00PM Sep 30, 2023Observed: 3.91 ft at 8:01PM Sep 30, 2023Observed: 3.81 ft at 8:15PM Sep 30, 2023Observed: 3.81 ft at 8:16PM Sep 30, 2023Observed: 3.79 ft at 8:20PM Sep 30, 2023Observed: 3.62 ft at 8:45PM Sep 30, 2023Observed: 3.58 ft at 8:50PM Sep 30, 2023Observed: 3.57 ft at 9:00PM Sep 30, 2023Observed: 3.68 ft at 9:15PM Sep 30, 2023Observed: 3.35 ft at 9:45PM Sep 30, 2023Observed: 3.27 ft at 10:00PM Sep 30, 2023Observed: 3.18 ft at 10:15PM Sep 30, 2023Observed: 3.12 ft at 10:45PM Sep 30, 2023Observed: 3.07 ft at 11:00PM Sep 30, 2023Observed: 3.03 ft at 11:15PM Sep 30, 2023Observed: 3 ft at 11:30PM Sep 30, 2023Observed: 2.92 ft at 11:45PM Sep 30, 2023Observed: 2.92 ft at 12:00AM Oct 01, 2023Observed: 2.89 ft at 12:15AM Oct 01, 2023Observed: 2.9 ft at 12:30AM Oct 01, 2023Observed: 2.87 ft at 12:45AM Oct 01, 2023Observed: 2.89 ft at 1:00AM Oct 01, 2023Observed: 2.88 ft at 1:15AM Oct 01, 2023Observed: 2.85 ft at 1:30AM Oct 01, 2023Observed: 2.87 ft at 1:45AM Oct 01, 2023Observed: 2.86 ft at 2:00AM Oct 01, 2023Observed: 2.84 ft at 2:15AM Oct 01, 2023Observed: 2.83 ft at 2:30AM Oct 01, 2023Observed: 2.81 ft at 2:45AM Oct 01, 2023Observed: 2.81 ft at 3:00AM Oct 01, 2023Observed: 2.8 ft at 3:15AM Oct 01, 2023Observed: 2.77 ft at 3:30AM Oct 01, 2023Observed: 2.77 ft at 3:31AM Oct 01, 2023Observed: 2.76 ft at 3:35AM Oct 01, 2023Observed: 2.76 ft at 3:45AM Oct 01, 2023Observed: 2.76 ft at 4:00AM Oct 01, 2023Observed: 2.75 ft at 4:15AM Oct 01, 2023Observed: 2.74 ft at 4:30AM Oct 01, 2023Observed: 2.73 ft at 4:45AM Oct 01, 2023Observed: 2.71 ft at 5:00AM Oct 01, 2023Observed: 2.69 ft at 5:15AM Oct 01, 2023Observed: 2.7 ft at 5:30AM Oct 01, 2023Observed: 2.73 ft at 5:45AM Oct 01, 2023Observed: 2.72 ft at 6:00AM Oct 01, 2023Observed: 2.71 ft at 6:15AM Oct 01, 2023Observed: 2.7 ft at 6:30AM Oct 01, 2023Observed: 2.7 ft at 6:45AM Oct 01, 2023Observed: 2.69 ft at 7:00AM Oct 01, 2023Observed: 2.7 ft at 7:15AM Oct 01, 2023Observed: 2.71 ft at 7:30AM Oct 01, 2023Observed: 2.77 ft at 7:45AM Oct 01, 2023Observed: 2.79 ft at 8:00AM Oct 01, 2023Observed: 2.78 ft at 8:15AM Oct 01, 2023Observed: 2.77 ft at 8:30AM Oct 01, 2023Observed: 2.77 ft at 8:45AM Oct 01, 2023Observed: 2.76 ft at 9:00AM Oct 01, 2023Observed: 2.76 ft at 9:15AM Oct 01, 2023Observed: 2.75 ft at 9:30AM Oct 01, 2023Observed: 2.75 ft at 9:46AM Oct 01, 2023Observed: 2.74 ft at 9:50AM Oct 01, 2023Observed: 2.74 ft at 10:00AM Oct 01, 2023Observed: 2.74 ft at 10:15AM Oct 01, 2023Observed: 2.73 ft at 10:30AM Oct 01, 2023Observed: 2.73 ft at 10:40AM Oct 01, 2023Observed: 2.72 ft at 10:45AM Oct 01, 2023Observed: 2.72 ft at 11:00AM Oct 01, 2023Observed: 2.72 ft at 11:15AM Oct 01, 2023Observed: 2.71 ft at 11:30AM Oct 01, 2023Observed: 2.7 ft at 11:45AM Oct 01, 2023Observed: 2.7 ft at 11:46AM Oct 01, 2023Observed: 2.7 ft at 11:50AM Oct 01, 2023Observed: 2.7 ft at 12:00PM Oct 01, 2023Observed: 2.68 ft at 12:25PM Oct 01, 2023Observed: 2.68 ft at 12:30PM Oct 01, 2023Observed: 2.68 ft at 12:40PM Oct 01, 2023Observed: 2.68 ft at 12:45PM Oct 01, 2023Observed: 2.68 ft at 12:46PM Oct 01, 2023Observed: 2.68 ft at 1:00PM Oct 01, 2023Observed: 2.67 ft at 1:15PM Oct 01, 2023Observed: 2.67 ft at 1:25PM Oct 01, 2023Observed: 2.66 ft at 1:30PM Oct 01, 2023Observed: 2.66 ft at 1:31PM Oct 01, 2023Observed: 2.65 ft at 1:45PM Oct 01, 2023Observed: 2.65 ft at 1:46PM Oct 01, 2023Observed: 2.65 ft at 1:51PM Oct 01, 2023Observed: 2.65 ft at 2:00PM Oct 01, 2023Observed: 2.64 ft at 2:15PM Oct 01, 2023Observed: 2.64 ft at 2:16PM Oct 01, 2023Observed: 2.64 ft at 2:20PM Oct 01, 2023Observed: 2.64 ft at 2:30PM Oct 01, 2023Observed: 2.64 ft at 2:45PM Oct 01, 2023Observed: 2.64 ft at 3:00PM Oct 01, 2023Observed: 2.63 ft at 3:15PM Oct 01, 2023Observed: 2.63 ft at 3:30PM Oct 01, 2023Observed: 2.63 ft at 3:45PM Oct 01, 2023Observed: 2.62 ft at 4:00PM Oct 01, 2023Observed: 2.62 ft at 4:15PM Oct 01, 2023Observed: 2.61 ft at 4:30PM Oct 01, 2023Observed: 2.61 ft at 4:45PM Oct 01, 2023Observed: 2.61 ft at 5:00PM Oct 01, 2023Observed: 2.6 ft at 5:15PM Oct 01, 2023Observed: 2.6 ft at 5:30PM Oct 01, 2023Observed: 2.6 ft at 5:45PM Oct 01, 2023Observed: 2.59 ft at 6:00PM Oct 01, 2023Observed: 2.76 ft at 6:30PM Oct 01, 2023Observed: 2.9 ft at 6:45PM Oct 01, 2023Observed: 2.94 ft at 6:50PM Oct 01, 2023Observed: 3.16 ft at 7:00PM Oct 01, 2023Observed: 3.62 ft at 7:15PM Oct 01, 2023Observed: 3.6 ft at 7:25PM Oct 01, 2023Observed: 3.54 ft at 7:30PM Oct 01, 2023Observed: 3.37 ft at 7:45PM Oct 01, 2023Observed: 3.32 ft at 8:00PM Oct 01, 2023Observed: 3.34 ft at 8:15PM Oct 01, 2023Observed: 3.24 ft at 8:30PM Oct 01, 2023Observed: 3.24 ft at 8:31PM Oct 01, 2023Observed: 3.37 ft at 8:36PM Oct 01, 2023Observed: 3.2 ft at 8:45PM Oct 01, 2023Observed: 3.16 ft at 9:00PM Oct 01, 2023Observed: 3.09 ft at 9:15PM Oct 01, 2023Observed: 3.04 ft at 9:30PM Oct 01, 2023Observed: 3.03 ft at 9:45PM Oct 01, 2023Observed: 3.02 ft at 10:00PM Oct 01, 2023Observed: 2.98 ft at 10:15PM Oct 01, 2023Observed: 2.97 ft at 10:30PM Oct 01, 2023Observed: 2.95 ft at 10:45PM Oct 01, 2023Observed: 2.97 ft at 11:00PM Oct 01, 2023Observed: 2.95 ft at 11:15PM Oct 01, 2023Observed: 2.94 ft at 11:30PM Oct 01, 2023Observed: 2.92 ft at 11:45PM Oct 01, 2023Observed: 2.9 ft at 12:00AM Oct 02, 2023Observed: 2.87 ft at 12:15AM Oct 02, 2023Observed: 2.87 ft at 12:30AM Oct 02, 2023Observed: 2.86 ft at 12:40AM Oct 02, 2023Observed: 2.85 ft at 12:45AM Oct 02, 2023Observed: 2.85 ft at 12:46AM Oct 02, 2023Observed: 2.84 ft at 1:00AM Oct 02, 2023Observed: 2.82 ft at 1:15AM Oct 02, 2023Observed: 2.81 ft at 1:30AM Oct 02, 2023Observed: 2.79 ft at 1:45AM Oct 02, 2023Observed: 2.79 ft at 2:00AM Oct 02, 2023Observed: 2.77 ft at 2:15AM Oct 02, 2023Observed: 2.76 ft at 2:30AM Oct 02, 2023Observed: 2.75 ft at 2:45AM Oct 02, 2023Observed: 2.74 ft at 3:00AM Oct 02, 2023USGS--Water Resources of the United StatesLOGP4(plotting HGIRG) Graph Created (4:21AM Oct 2, 2023)ObservedLatest observed value: 2.74 ft at 3:00 AM AST 2-Oct-2023.
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 Loco at Las Latas. Only observed stages are available for this point.
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Flood Categories (in feet)
Not Available

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 6.91 ft on 06/06/2007
Zoom Level:16
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: 18.007182° N, Longitude: 66.876320° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available 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 95 Not Available 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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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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