OneRain Incorporated

- Real-time, Future and Historical Rainfall Data Services

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Accurate estimation of the spatial distribution of rainfall is critical to successfully model hydrologic processes. OneRain works with organizations across to U.S. to provide calibrated radar rainfall data to help characterize storm events or flow problems in collection systems, and as a basis for both real-time and design-oriented modeling. Real-time, future, historical rainfall data are used in Stormwater Modeling, Inflow/Infiltration, NPDES, Flood Warning, Design Storms, and TDML. OneRain also provides expert witness services for cases that rest on understanding the rainfall at a particular place and time. Gauge-Adjusted Radar Rainfall (GARR) marries rain gauge measurement at a point with the spatially distributed information from NEXRAD radars to give you ground truthed, spatially distributed rainfall information over your area of interest.

Services we provide

  • Real-time gauge-adjusted radar-rainfall data, basin-average rainfall and forecast rainfall
  • End-of-month archive quality gauge adjusted radar rainfall
  • Historical and post-event analysis using archived rainfall estimates
  • Web delivered data
  • StormProperties™ Analysis
Benefits
  • Mosaic of radars over your area
  • Historical data from 1993 to present
  • Multiple file delivery formats including delimited files, Excel spreadsheets, ArcView shape files, NetCDF, and more
  • Innovative quality control procedures
  • Quick turnaround for an analysis

OneRain uses an innovative approach to derive rainfall rates from each 1-kmor 2-km2 radar pixel and calibrates these rates using rain gauge data to deliver groundtruthed rainfall estimates. OneRainware radar processing has evolved continuously since 1994 into the data quality management system required to produce archive quality data for flood warning, hydrology models for stormwater and sewer systems modeling, rainfall-dependent inflows/infiltrations (RDII) studies, litigation, real-time control, design storms and EPA National Pollutant Discharge Elimination System (NPDES) compliance activities.

OneRain maintains one of, if not the most complete record of historical, nationwide radar archive in the United States.

Either supplied by the customer or procured by OneRain, local rain gauge data are used to calibrate radar-estimates for specific customer applications using a spatially distributed adjustment process. This process can correct different spatial and temporal errors concurrently over the area of interest.

Every five minutes, nearly 20 million new radar-rainfall estimates are added to OneRain’s 1km2 database. Historical records of the mosaics are maintained in OneRain’s nationwide radar archive:

  • 2-km2, 15-minute data from 1993 to the present
  • 1-km2, 5-minute data from 2002 to the present

Either supplied by the customer or procured by OneRain, local rain gauge data are used to calibrate radar-estimates for specific customer applications using a spatially distributed adjustment process. This process can correct different spatial and temporal errors concurrently over the area of interest.

OneRain uses real-time radar rainfall estimates and real-time rain gauge data from its customers to calibrate the radar data and deliver the adjusted radar rainfall data immediately back to our customers in a variety of formats. With minimal latency, OneRain estimates and calculates these radar-derived and gauge-adjusted rainfall rates that can be used for real-time run-off modeling, decision support, and more.

OneRain can also calculate the average rainfall over a customer specified drainage basin for runoff modeling or monitoring for critical rainfall rates. Forecast radar data out to 4 hours can also be delivered for understanding approaching storms and their impacts.

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