NAM reflectivity forecast

Notes:

The operational NAM forecast the development of a line of high reflectivity stretching from central New York through Pennsylvania by 21z on the 26th, then moved the line downstream toward eastern New York and northeast Pennsylvania by 00z. Even with a resolution of 12 km, the NAM sometimes captures the correct storm structures associated with convection, although typically performance is best when large-scale forcing is strong.

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Slide 10