The GFS commonly develops fictitious storms in the western Caribbean. Typically, these arise from the aggregation of multiple small-scale vorticity perturbations (left panel) caused by and collocated with strong bursts of convection/precip (right panel).

While the GFS is not… pic.twitter.com/qwRdk2msxf

— Dr. Levi Cowan (@TropicalTidbits) June 10, 2023