Gauge-Adjusted Radar Rainfall

StormData™ Real-time, Future, and Historical Rainfall Data Services

rainfall data analysis, radar rainfall national mosaic archive

Need better rainfall data? You've come to the right place.

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 Rainfall Runoff Modeling, Stormwater Modeling, Inflow/Infiltration, NPDES, Flood Warning, Design Storms, and TDML. OneRain also provides expert witness services for litigation 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.

OneRain has precipitation records dating back from 1993 to the present.

GARR and Basin Average Precipitation Radar Rainfall

rainfall data database

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
  • Secure 24/7 Data Services
  • Web delivered data
  • StormProperties™ Analysis
  • 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. StormData 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.

image of rainfall radar with gauges

Historical Radar Data Services

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

• 2-km2, 15-minute data from 1993 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.

Our rainfall experts are focused on creating the best possible spatially distributed rainfall product. Talk to one of our professional experts today to learn more about how our products and services can help you.

Call now! 1-800-758-RAIN toll free, or (303) 774-2033.

StormData-GARR_StormProperties-Rev-1p2.pdf3.1 MB