Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left
Bookmark and Share Navigation Bar End Cap

  
 
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)Highest Observation: 6.52 ft at 2:30AM Oct 16, 2018Highest Observation: 6.52 ft at 2:45AM Oct 16, 2018Highest Observation: 6.52 ft at 3:00AM Oct 16, 2018Highest Observation: 6.52 ft at 3:15AM Oct 16, 2018Highest Observation: 6.52 ft at 3:30AM Oct 16, 2018Highest Observation: 6.52 ft at 3:45AM Oct 16, 2018Observed: 6.51 ft at 4:00AM Oct 16, 2018Observed: 6.51 ft at 4:15AM Oct 16, 2018Observed: 6.51 ft at 4:30AM Oct 16, 2018Observed: 6.51 ft at 4:45AM Oct 16, 2018Observed: 6.51 ft at 5:00AM Oct 16, 2018Observed: 6.51 ft at 5:15AM Oct 16, 2018Observed: 6.51 ft at 5:30AM Oct 16, 2018Observed: 6.51 ft at 5:45AM Oct 16, 2018Observed: 6.5 ft at 6:00AM Oct 16, 2018Observed: 6.51 ft at 6:15AM Oct 16, 2018Observed: 6.5 ft at 6:30AM Oct 16, 2018Observed: 6.5 ft at 6:45AM Oct 16, 2018Observed: 6.51 ft at 7:00AM Oct 16, 2018Observed: 6.5 ft at 7:15AM Oct 16, 2018Observed: 6.5 ft at 7:30AM Oct 16, 2018Observed: 6.5 ft at 7:45AM Oct 16, 2018Observed: 6.5 ft at 8:00AM Oct 16, 2018Observed: 6.49 ft at 8:15AM Oct 16, 2018Observed: 6.5 ft at 8:30AM Oct 16, 2018Observed: 6.5 ft at 8:45AM Oct 16, 2018Observed: 6.49 ft at 9:00AM Oct 16, 2018Observed: 6.48 ft at 9:15AM Oct 16, 2018Observed: 6.47 ft at 9:30AM Oct 16, 2018Observed: 6.49 ft at 9:45AM Oct 16, 2018Observed: 6.49 ft at 10:00AM Oct 16, 2018Observed: 6.49 ft at 10:15AM Oct 16, 2018Observed: 6.5 ft at 10:30AM Oct 16, 2018Observed: 6.49 ft at 10:45AM Oct 16, 2018Observed: 6.49 ft at 11:00AM Oct 16, 2018Observed: 6.48 ft at 11:15AM Oct 16, 2018Observed: 6.48 ft at 11:30AM Oct 16, 2018Observed: 6.43 ft at 11:45AM Oct 16, 2018Observed: 6.45 ft at 12:00PM Oct 16, 2018Observed: 6.47 ft at 12:15PM Oct 16, 2018Observed: 6.41 ft at 12:30PM Oct 16, 2018Observed: 6.45 ft at 12:45PM Oct 16, 2018Observed: 6.48 ft at 1:00PM Oct 16, 2018Observed: 6.47 ft at 1:15PM Oct 16, 2018Observed: 6.47 ft at 1:30PM Oct 16, 2018Observed: 6.48 ft at 1:45PM Oct 16, 2018Observed: 6.47 ft at 2:00PM Oct 16, 2018Observed: 6.48 ft at 2:15PM Oct 16, 2018Observed: 6.48 ft at 2:30PM Oct 16, 2018Observed: 6.47 ft at 2:45PM Oct 16, 2018Observed: 6.46 ft at 3:00PM Oct 16, 2018Observed: 6.47 ft at 3:15PM Oct 16, 2018Observed: 6.46 ft at 3:21PM Oct 16, 2018Observed: 6.47 ft at 3:30PM Oct 16, 2018Observed: 6.45 ft at 3:45PM Oct 16, 2018Observed: 6.48 ft at 4:00PM Oct 16, 2018Observed: 6.46 ft at 4:15PM Oct 16, 2018Observed: 6.43 ft at 4:30PM Oct 16, 2018Observed: 6.47 ft at 4:45PM Oct 16, 2018Observed: 6.47 ft at 5:00PM Oct 16, 2018Observed: 6.47 ft at 5:15PM Oct 16, 2018Observed: 6.48 ft at 5:30PM Oct 16, 2018Observed: 6.47 ft at 5:45PM Oct 16, 2018Observed: 6.47 ft at 6:00PM Oct 16, 2018Observed: 6.47 ft at 6:15PM Oct 16, 2018Observed: 6.47 ft at 6:30PM Oct 16, 2018Observed: 6.46 ft at 6:45PM Oct 16, 2018Observed: 6.47 ft at 7:00PM Oct 16, 2018Observed: 6.46 ft at 7:15PM Oct 16, 2018Observed: 6.46 ft at 7:30PM Oct 16, 2018Observed: 6.46 ft at 7:45PM Oct 16, 2018Observed: 6.46 ft at 8:00PM Oct 16, 2018Observed: 6.46 ft at 8:15PM Oct 16, 2018Observed: 6.46 ft at 8:30PM Oct 16, 2018Observed: 6.46 ft at 8:45PM Oct 16, 2018Observed: 6.46 ft at 9:00PM Oct 16, 2018Observed: 6.46 ft at 9:15PM Oct 16, 2018Observed: 6.46 ft at 9:30PM Oct 16, 2018Observed: 6.46 ft at 9:45PM Oct 16, 2018Observed: 6.46 ft at 10:00PM Oct 16, 2018Observed: 6.46 ft at 10:15PM Oct 16, 2018Observed: 6.46 ft at 10:30PM Oct 16, 2018Observed: 6.47 ft at 10:45PM Oct 16, 2018Observed: 6.46 ft at 11:00PM Oct 16, 2018Observed: 6.46 ft at 11:15PM Oct 16, 2018Observed: 6.46 ft at 11:20PM Oct 16, 2018Observed: 6.46 ft at 11:30PM Oct 16, 2018Observed: 6.45 ft at 11:45PM Oct 16, 2018Observed: 6.46 ft at 12:00AM Oct 17, 2018Observed: 6.46 ft at 12:15AM Oct 17, 2018Observed: 6.45 ft at 12:30AM Oct 17, 2018Observed: 6.45 ft at 12:45AM Oct 17, 2018Observed: 6.45 ft at 1:00AM Oct 17, 2018Observed: 6.45 ft at 1:15AM Oct 17, 2018Observed: 6.44 ft at 1:30AM Oct 17, 2018Observed: 6.45 ft at 1:45AM Oct 17, 2018Observed: 6.45 ft at 2:00AM Oct 17, 2018Observed: 6.45 ft at 2:15AM Oct 17, 2018Observed: 6.45 ft at 2:30AM Oct 17, 2018Observed: 6.45 ft at 2:45AM Oct 17, 2018Observed: 6.44 ft at 3:00AM Oct 17, 2018Observed: 6.44 ft at 3:15AM Oct 17, 2018Observed: 6.44 ft at 3:30AM Oct 17, 2018Observed: 6.44 ft at 3:45AM Oct 17, 2018Observed: 6.45 ft at 4:00AM Oct 17, 2018Observed: 6.45 ft at 4:15AM Oct 17, 2018Observed: 6.44 ft at 4:30AM Oct 17, 2018Observed: 6.45 ft at 4:45AM Oct 17, 2018Observed: 6.44 ft at 5:00AM Oct 17, 2018Observed: 6.44 ft at 5:15AM Oct 17, 2018Observed: 6.44 ft at 5:30AM Oct 17, 2018Observed: 6.43 ft at 5:45AM Oct 17, 2018Observed: 6.43 ft at 6:00AM Oct 17, 2018Observed: 6.44 ft at 6:15AM Oct 17, 2018Observed: 6.43 ft at 6:30AM Oct 17, 2018Observed: 6.43 ft at 6:45AM Oct 17, 2018Observed: 6.43 ft at 7:00AM Oct 17, 2018Observed: 6.43 ft at 7:15AM Oct 17, 2018Observed: 6.44 ft at 7:30AM Oct 17, 2018Observed: 6.44 ft at 7:45AM Oct 17, 2018Observed: 6.44 ft at 8:00AM Oct 17, 2018Observed: 6.43 ft at 8:15AM Oct 17, 2018Observed: 6.43 ft at 8:30AM Oct 17, 2018Observed: 6.42 ft at 8:45AM Oct 17, 2018Observed: 6.41 ft at 9:00AM Oct 17, 2018Observed: 6.42 ft at 9:15AM Oct 17, 2018Observed: 6.43 ft at 9:30AM Oct 17, 2018Observed: 6.42 ft at 9:45AM Oct 17, 2018Observed: 6.44 ft at 10:00AM Oct 17, 2018Observed: 6.37 ft at 10:15AM Oct 17, 2018Observed: 6.38 ft at 10:30AM Oct 17, 2018Observed: 6.41 ft at 10:45AM Oct 17, 2018Observed: 6.43 ft at 11:00AM Oct 17, 2018Observed: 6.42 ft at 11:15AM Oct 17, 2018Observed: 6.42 ft at 11:30AM Oct 17, 2018Observed: 6.42 ft at 11:45AM Oct 17, 2018Observed: 6.41 ft at 12:00PM Oct 17, 2018Observed: 6.42 ft at 12:15PM Oct 17, 2018Observed: 6.42 ft at 12:30PM Oct 17, 2018Observed: 6.4 ft at 12:45PM Oct 17, 2018Observed: 6.41 ft at 1:00PM Oct 17, 2018Observed: 6.39 ft at 1:15PM Oct 17, 2018Observed: 6.42 ft at 1:30PM Oct 17, 2018Observed: 6.43 ft at 1:45PM Oct 17, 2018Observed: 6.43 ft at 2:00PM Oct 17, 2018Observed: 6.43 ft at 2:15PM Oct 17, 2018Observed: 6.42 ft at 2:30PM Oct 17, 2018Observed: 6.43 ft at 2:45PM Oct 17, 2018Observed: 6.42 ft at 3:00PM Oct 17, 2018Observed: 6.42 ft at 3:15PM Oct 17, 2018Observed: 6.42 ft at 3:26PM Oct 17, 2018Observed: 6.42 ft at 3:30PM Oct 17, 2018Observed: 6.42 ft at 3:45PM Oct 17, 2018Observed: 6.41 ft at 4:00PM Oct 17, 2018Observed: 6.41 ft at 4:15PM Oct 17, 2018Observed: 6.42 ft at 4:30PM Oct 17, 2018Observed: 6.42 ft at 4:45PM Oct 17, 2018Observed: 6.42 ft at 5:00PM Oct 17, 2018Observed: 6.41 ft at 5:15PM Oct 17, 2018Observed: 6.41 ft at 5:30PM Oct 17, 2018Observed: 6.42 ft at 5:45PM Oct 17, 2018Observed: 6.41 ft at 6:00PM Oct 17, 2018Observed: 6.41 ft at 6:15PM Oct 17, 2018Observed: 6.42 ft at 6:30PM Oct 17, 2018Observed: 6.41 ft at 6:45PM Oct 17, 2018Observed: 6.42 ft at 7:00PM Oct 17, 2018Observed: 6.42 ft at 7:15PM Oct 17, 2018Observed: 6.42 ft at 7:30PM Oct 17, 2018Observed: 6.41 ft at 7:45PM Oct 17, 2018Observed: 6.42 ft at 8:00PM Oct 17, 2018Observed: 6.41 ft at 8:15PM Oct 17, 2018Observed: 6.41 ft at 8:30PM Oct 17, 2018Observed: 6.41 ft at 8:45PM Oct 17, 2018Observed: 6.41 ft at 9:00PM Oct 17, 2018Observed: 6.4 ft at 9:15PM Oct 17, 2018Observed: 6.4 ft at 9:30PM Oct 17, 2018Observed: 6.4 ft at 9:45PM Oct 17, 2018Observed: 6.41 ft at 10:00PM Oct 17, 2018Observed: 6.41 ft at 10:15PM Oct 17, 2018Observed: 6.4 ft at 10:30PM Oct 17, 2018Observed: 6.4 ft at 10:45PM Oct 17, 2018Observed: 6.4 ft at 11:00PM Oct 17, 2018Observed: 6.4 ft at 11:15PM Oct 17, 2018Observed: 6.41 ft at 11:26PM Oct 17, 2018Observed: 6.41 ft at 11:30PM Oct 17, 2018Observed: 6.41 ft at 11:45PM Oct 17, 2018Observed: 6.42 ft at 12:00AM Oct 18, 2018Observed: 6.43 ft at 12:15AM Oct 18, 2018Observed: 6.44 ft at 12:30AM Oct 18, 2018Observed: 6.45 ft at 12:45AM Oct 18, 2018Observed: 6.45 ft at 1:00AM Oct 18, 2018Observed: 6.45 ft at 1:15AM Oct 18, 2018Observed: 6.45 ft at 1:30AM Oct 18, 2018Observed: 6.44 ft at 1:45AM Oct 18, 2018Observed: 6.44 ft at 2:00AM Oct 18, 2018Observed: 6.44 ft at 2:15AM Oct 18, 2018Observed: 6.45 ft at 2:30AM Oct 18, 2018Observed: 6.44 ft at 2:45AM Oct 18, 2018Observed: 6.43 ft at 3:00AM Oct 18, 2018Observed: 6.44 ft at 3:15AM Oct 18, 2018Observed: 6.45 ft at 3:30AM Oct 18, 2018Observed: 6.44 ft at 3:45AM Oct 18, 2018Observed: 6.43 ft at 4:00AM Oct 18, 2018Observed: 6.44 ft at 4:15AM Oct 18, 2018Observed: 6.42 ft at 4:30AM Oct 18, 2018Observed: 6.43 ft at 4:45AM Oct 18, 2018Observed: 6.42 ft at 5:00AM Oct 18, 2018Observed: 6.42 ft at 5:15AM Oct 18, 2018Observed: 6.42 ft at 5:30AM Oct 18, 2018Observed: 6.42 ft at 5:45AM Oct 18, 2018Observed: 6.42 ft at 6:00AM Oct 18, 2018Observed: 6.42 ft at 6:15AM Oct 18, 2018Observed: 6.41 ft at 6:30AM Oct 18, 2018Observed: 6.41 ft at 6:45AM Oct 18, 2018Observed: 6.41 ft at 7:00AM Oct 18, 2018Observed: 6.41 ft at 7:15AM Oct 18, 2018Observed: 6.4 ft at 7:26AM Oct 18, 2018Observed: 6.4 ft at 7:30AM Oct 18, 2018Observed: 6.4 ft at 7:45AM Oct 18, 2018Observed: 6.4 ft at 8:00AM Oct 18, 2018Observed: 6.4 ft at 8:15AM Oct 18, 2018Observed: 6.39 ft at 8:30AM Oct 18, 2018Observed: 6.39 ft at 8:45AM Oct 18, 2018Observed: 6.4 ft at 9:00AM Oct 18, 2018Observed: 6.39 ft at 9:15AM Oct 18, 2018Observed: 6.38 ft at 9:30AM Oct 18, 2018Observed: 6.39 ft at 9:45AM Oct 18, 2018Observed: 6.38 ft at 10:00AM Oct 18, 2018Observed: 6.35 ft at 10:15AM Oct 18, 2018Observed: 6.38 ft at 10:30AM Oct 18, 2018Observed: 6.39 ft at 10:45AM Oct 18, 2018Observed: 6.39 ft at 11:00AM Oct 18, 2018Observed: 6.38 ft at 11:15AM Oct 18, 2018Observed: 6.31 ft at 11:30AM Oct 18, 2018Observed: 6.38 ft at 11:45AM Oct 18, 2018Observed: 6.36 ft at 12:00PM Oct 18, 2018Observed: 6.35 ft at 12:15PM Oct 18, 2018Observed: 6.37 ft at 12:30PM Oct 18, 2018Observed: 6.37 ft at 12:45PM Oct 18, 2018Observed: 6.37 ft at 1:00PM Oct 18, 2018Observed: 6.31 ft at 1:15PM Oct 18, 2018Observed: 6.36 ft at 1:30PM Oct 18, 2018Observed: 6.29 ft at 1:45PM Oct 18, 2018Observed: 6.37 ft at 2:00PM Oct 18, 2018Observed: 6.36 ft at 2:15PM Oct 18, 2018Observed: 6.31 ft at 2:30PM Oct 18, 2018Observed: 6.32 ft at 2:45PM Oct 18, 2018Observed: 6.31 ft at 3:00PM Oct 18, 2018Observed: 6.36 ft at 3:15PM Oct 18, 2018Observed: 6.36 ft at 3:30PM Oct 18, 2018Observed: 6.34 ft at 3:45PM Oct 18, 2018Observed: 6.34 ft at 4:00PM Oct 18, 2018Observed: 6.31 ft at 4:15PM Oct 18, 2018Observed: 6.32 ft at 4:30PM Oct 18, 2018Observed: 6.28 ft at 4:45PM Oct 18, 2018Observed: 6.36 ft at 5:00PM Oct 18, 2018Observed: 6.37 ft at 5:15PM Oct 18, 2018Observed: 6.36 ft at 5:30PM Oct 18, 2018Observed: 6.36 ft at 5:45PM Oct 18, 2018Observed: 6.36 ft at 6:00PM Oct 18, 2018Observed: 6.36 ft at 6:15PM Oct 18, 2018Observed: 6.35 ft at 6:30PM Oct 18, 2018Observed: 6.36 ft at 6:45PM Oct 18, 2018Observed: 6.37 ft at 7:00PM Oct 18, 2018Observed: 6.37 ft at 7:15PM Oct 18, 2018Observed: 6.37 ft at 7:30PM Oct 18, 2018Observed: 6.36 ft at 7:45PM Oct 18, 2018Observed: 6.37 ft at 8:00PM Oct 18, 2018Observed: 6.36 ft at 8:15PM Oct 18, 2018Observed: 6.36 ft at 8:30PM Oct 18, 2018Observed: 6.36 ft at 8:45PM Oct 18, 2018Observed: 6.36 ft at 9:00PM Oct 18, 2018Observed: 6.35 ft at 9:15PM Oct 18, 2018Observed: 6.35 ft at 9:30PM Oct 18, 2018Observed: 6.35 ft at 9:45PM Oct 18, 2018Observed: 6.36 ft at 10:00PM Oct 18, 2018Observed: 6.36 ft at 10:15PM Oct 18, 2018Observed: 6.35 ft at 10:30PM Oct 18, 2018Observed: 6.35 ft at 10:45PM Oct 18, 2018Observed: 6.35 ft at 11:00PM Oct 18, 2018Observed: 6.35 ft at 11:15PM Oct 18, 2018Observed: 6.35 ft at 11:30PM Oct 18, 2018Observed: 6.35 ft at 11:45PM Oct 18, 2018Observed: 6.35 ft at 12:00AM Oct 19, 2018Observed: 6.35 ft at 12:15AM Oct 19, 2018Observed: 6.35 ft at 12:30AM Oct 19, 2018Observed: 6.35 ft at 12:45AM Oct 19, 2018Observed: 6.35 ft at 1:00AM Oct 19, 2018USGS--Water Resources of the United StatesSEBP4(plotting HGIRG) Graph Created (2:20AM Oct 19, 2018)ObservedLatest observed value: 6.35 ft at 1:00 AM AST 19-Oct-2018. Flood Stage is 11 ft
Printable Image
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 Anasco near San Sebastian. Only observed stages are available for this point.

Return to Area Map
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) 34.50 ft on 09/22/1998
(2) 33.90 ft on 09/16/1975
(3) 31.36 ft on 09/20/2017 (P)
(4) 26.77 ft on 05/18/1985
(5) 21.94 ft on 10/07/1985
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 31.36 ft on 09/20/2017 (P)
(2) 11.95 ft on 09/20/2015
(3) 13.86 ft on 08/24/2014
(4) 12.43 ft on 05/10/2013
(5) 11.10 ft on 05/02/2012
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 04/18/1965

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.
Flood Impacts & Photos Collapse
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.
About This Location Collapse

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:

Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
Ask Questions/Webmaster
Page last modified: 21-Dec-2016 5:21 PM
Disclaimer
Credits
Glossary
Privacy Policy
About Us
Career Opportunities