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

Hydrograph River at a Glance Download
Rio Grande De Anasco near San Sebastian Stage (ft)Flow (kcfs)Observed: 4.11 ft at 1:10PM Aug 01, 2020Observed: 4.14 ft at 2:00PM Aug 01, 2020Observed: 4.14 ft at 2:01PM Aug 01, 2020Observed: 4.14 ft at 2:06PM Aug 01, 2020Observed: 4.24 ft at 2:15PM Aug 01, 2020Observed: 4.24 ft at 2:16PM Aug 01, 2020Observed: 4.16 ft at 2:20PM Aug 01, 2020Observed: 4.28 ft at 2:30PM Aug 01, 2020Observed: 4.28 ft at 2:31PM Aug 01, 2020Observed: 5.62 ft at 3:30PM Aug 01, 2020Observed: 5.62 ft at 3:31PM Aug 01, 2020Observed: 5.78 ft at 3:35PM Aug 01, 2020Observed: 5.96 ft at 3:45PM Aug 01, 2020Highest Observation: 6.08 ft at 4:00PM Aug 01, 2020Observed: 6.01 ft at 4:15PM Aug 01, 2020Observed: 5.92 ft at 4:30PM Aug 01, 2020Observed: 5.65 ft at 4:45PM Aug 01, 2020Observed: 5.65 ft at 5:00PM Aug 01, 2020Observed: 5.25 ft at 5:15PM Aug 01, 2020Observed: -1310.72 ft at 9:26AM Aug 02, 2020Observed: -1310.72 ft at 9:31AM Aug 03, 2020Observed: -1310.72 ft at 5:31PM Aug 03, 2020USGS--Water Resources of the United StatesSEBP4(plotting HGIRG) Graph Created (2:06AM Aug 4, 2020)ObservedLatest observed value: -1310.72 ft at 5:31 PM AST 3-Aug-2020. Flood Stage is 11 ft
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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 Anasco near San Sebastian. Only observed stages are available for this point.

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Flood Categories (in feet)
Major Flood Stage: 19
Moderate Flood Stage: 14
Flood Stage: 11
Action Stage: 7
Low Stage (in feet): 0

Historic Crests
(1) 35.84 ft on 09/20/2017
(2) 35.84 ft on 09/20/2017
(3) 34.50 ft on 09/22/1998
(4) 33.90 ft on 09/16/1975
(5) 31.36 ft on 09/20/2017 (P)
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(P): Preliminary values subject to further review.

Recent Crests
(1) 35.84 ft on 09/20/2017
(2) 31.36 ft on 09/20/2017 (P)
(3) 35.84 ft on 09/20/2017
(4) 11.95 ft on 09/20/2015
(5) 13.86 ft on 08/24/2014
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(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.
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If you notice any errors in the below information, please contact our Webmaster
20 Flooding can be expected downstream in Barrio Espino within the next couple of hours.Evacuations may be necessary.
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Latitude: 18.284722° N, Longitude: 67.051389° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 103.72 ft 114.72 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
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: 1-Mar-2019 12:35 AM
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