Hurricane Dorian (2019) brought heavy rain to the Caribbean, along the US East Coast, and up to Canada. NASA satellite-based precipitation estimates tracked the storm throughout its lifetime, as shown by the sequence of images below.
The GPM Cold-season Precipitation Experiment (GCPEx) to measure falling snow is currently underway in Ontario, Canada. The field campaign, which runs from January 17 to February 29, 2012, is designed to improve satellite estimates of falling snow and test ground validation capabilities for GPM.
Learn more about GCPEx:
GPM's ground validation scientist, Walt Petersen sent us our first photos from the CARE site in Ontario, Canada. Snow's already on the ground, now we're just waiting for more to fall!
Today the GPM Cold-weather Precipitation Experiment (GCPEx) officially began, and instead of snow, all that came down from the sky was cold rain.
During the GPM pre-launch period physically-based snowfall retrieval algorithms are in an active phase of development. Further refinement and testing of these emerging algorithms requires the collection of targeted ground-validation datasets in snowing environments. This document describes a field campaign effort designed to provide both new datasets and physical insights related to the snowfall process- especially as they relate to the incorporation of appropriate physics into GPM snowfall retrieval algorithms.