Winds have become light to calm across Texas this evening. Skies are also crystal clear with clouds hard to find. Light winds and clear skies present a good opportunity for radiational cooling. While the sun radiates heat onto the surface during the day, the earth radiates heat into space at night. With no clouds and light winds, heat is able to leave the surface more quickly. That is why temperatures have fallen so quickly this evening. That trend will continue overnight and we can expect cold temperatures by morning. Check out how cold it will get by Friday morning!