POSTED: Monday, December 16, 2013 - 6:00pm
UPDATED: Tuesday, December 17, 2013 - 11:04am
Morning low temperatures were in the mid 30s, well above freezing. So how is it possible to have frost on the windshields and roofs?
BARRY GOLDSMITH IS A METEOROLOGIST AT THE NATIONAL WEATHER SERVICE IN BROWNSVILLE. HE OFFERED THIS EXPLANATION: "There was this white stuff that people could see on a car window or rooftop and they were hearing the air temperature was close to 40 you are asking why is that so, it's the radiant properties of these elements, roofs, shingles, grass blades that allow the temperature of them to fall to the freezing point while the humidity around that was trying to break 100% hits saturated, at freezing turned to ice thats why you saw a icy look versus a dew look."
In summary, though the air temperature was above freezing, the surfaces of the cars and roofs did freeze. That's why we had the frost.