Low pressure in the upper atmosphere usually represent colder air. That's exactly what is sitting over our area. A pocket of cold air. In fact this pocket of cold air has broken away from the main jet stream and is what we call in the weather business "closed off". Meaning just what it says. It has broken off from the main flow and is now sitting right over the area. This is a stable weather situation that traps moisture in the lowest levels of the atmophere. Final result, clouds, chilly temperatures, and off and on periods of misty rain.