Hydro Daily Briefing

Click here for a  seven-days  Excessive Rainfall Outlook.

The 13 National Weather Service (NWS) River Forecast Centers (RFC) produce Quantitative Precipitation Estimates (QPE) for their individual RFC areas. The RFCs produce the data using a multi-sensor approach utilizing NWS 88D radar estimates of precipitation, automated and manual precipitation gauges, and satellite precipitation estimates. The QPEs from each RFC are combined into a single mosaic to create a QPE product that covers the lower 48 states, Alaska, and Puerto Rico. The data are on an approximate 4km x 4km grid cell scale.

The individual daily data products (those labeled Last X Days Observed, and those labeled X To Date Observed) represent a 24-hour total ending at 12 UTC on the indicated date. These 24-hour data are then summed together to produce multi-day precipitation totals. Normal precipitation data are also produced for multi-day summations of 7 days or greater using data from the PRISM Climate Group. Departure from normal comparisons are computed by comparing the QPE data with the PRISM normal data.

For 24-hour daily rainfall forecast for each day, click the following links:

 Day1 ,  Day2 ,  Day3 ,  Day4 ,  Day5 

 GOES-PRWEB  (Geostationary Operational Environmental Satellites - Puerto Rico Web) is a web-based platform that provides access to satellite data and imagery specifically tailored for Puerto Rico and the surrounding Caribbean region. It utilizes data from the Geostationary Operational Environmental Satellites (GOES).

 USGS WaterWatch  is a web-based platform provided by the U.S. Geological Survey (USGS) that offers real-time and historical data on water conditions across the United States, including Puerto Rico. The platform is designed to help users monitor and understand water-related data such as streamflow, river levels, and precipitation.

The  National Water Prediction Service  provides hydrographs that display how the river level changes over time at a specific location. If available, the hydrograph for the past few days is provided. Click on each river sensor for additional information, including flood stages for each river and a link to the specific river's hydrograph. The following terminology is used when describing floods:

• Minor flooding: Minimal or no property damage, but possibly some public threat.
• Moderate Flooding: Some inundation of structures and roads near the stream. Some evacuations of people and/or transfer of property to higher elevations.
• Major Flooding: Extensive inundation of structures and roads. Significant evacuations of people and/or transfer of property to higher elevations.
• Record Flooding: Flooding that equals or exceeds the highest stage or discharge at a given site during the period of record keeping.
• Stage: Level of the water surface in a river measured with reference to some datum.

Depth-to-water is measured periodically to evaluate hydrologic conditions at important aquifers throughout Puerto Rico. Using this information water-level measurements from observation wells can be computed to understand the hydrologic stresses acting on aquifers and how these stresses affect groundwater conditions. The schematic below shows depth-to-water information for selected continuous recording observation wells along the South Coast aquifer, Puerto Rico. Additional well data can be found  here .

The Puerto Rico Landslide Hazard Mitigation Office is a part of the University of Puerto Rico Department of Geology in Mayagüez, PR. The office works with diverse partners to accomplish its mission to carry out continuous research and community engagement activities related to landslide hazards in Puerto Rico. Click  here  to access their webpage.