MRMS currently integrates about 180 operational radars and creates a seamless 3D radar mosaic across the conterminous United States (CONUS) and southern Canada at very high spatial (1 km) and temporal (2 min) resolution. The Multi-Radar Multi-Sensor (MRMS) system recently implemented at the National Centers for Environmental Prediction (NCEP) demonstrated such capabilities. Advances in computational speed and expanding Internet bandwidth facilitated the ability to move radar base data from single radars into regional and national centers for processing ( Droegemeier et al. Over the last two decades, there has been a focus on developing new applications and systems to address requirements for seamless national radar information for use in model data assimilation, transportation, and quantitative precipitation estimation, which integrate multiple overlapping radars with other in situ or remote sensing observations and numerical weather prediction (NWP) model output. The initial operating capabilities of the Multi-Radar Multi-Sensor quantitative precipitation system include an ensemble of quantitative precipitation estimations and associated diagnostic products based on radar, gauge, and atmospheric environmental and climatological data at 1-km resolution and a 2-min update cycle over the conterminous United States.
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