Flsahing Temp light

It was about 45 degrees this morning. My Temp light was flashing when started the car. I only drove about a 1/2 mile and it was blinking the whole way. This means low coolant right?

Yep, same thing happened to me and unfortunately my coolant phlange on the engine block was cracked and leaking as well as the water pump. I'd check your whole coolant system for leaks.