Way back in 2003, the IEM started generating NWS NEXRAD Mosaics for the contiguous US. Over the years, the archive was back-filled using data from NCEI to the start of 1995. The featured plot presents the mosaic product valid 5 AM each 3 September since 1995. These plots and certainly the mosaic itself is not necessarily meant to be a scientifically rigorous product, but something that can be used as a quick screening and assessment tool. These days there are much more advanced mosaics available, including NOAA MRMS and GridRad. Here's to the next 31 years of generating this product by the IEM!

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