GOES-R Fog/Low Cloud product over Lake Superior

The GOES-R Fog/Low Cloud product IFR Probability (that is, the probability of visibilities at or below 3 miles), below, shows a pocket of higher values near the coast of Lake Superior in northwest Ontario.  Visible imagery (bottom) confirms the presence of stratiform clouds in this region.  Southwest winds move relatively warm and moist air over the cooler lake surface (Lake SSTs are at or below 50), chilling the air to its dewpoint.   The GOES-R Fog/Low Cloud product fuses Rapid Refresh data and satellite data.

Scott Lindstrom, UW-CIMSS and Steve Hentz NWS-MKX