The featured map is a combination of record minimum high temperatures for Friday and model forecasted 850 hPa potential temperature (a level in the atmosphere a few thousand feet above our head). As the sun tries to heat our air from the ground up, it mixes the air down that is in the lowest part of the atmosphere. For today, this air is rather cool and will help to keep high temperatures today near record minimum values. We are also starting off with temps only in the lower 50s! Where did summer go as this feels like fall!

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