What type of weather front would be responsible for the following forecast: "Increasing cloudiness and rising temperatures today with a high of 54Ëš F. Steadily dropping air pressure. Possibility of showers and thunderstorms this evening. Southwesterly winds with gusts up to 30 mph shifting northwesterly by tonight. Temperature dropping into the mid-thirties by tonight with a low of 25Ëš F early tomorrow morning with clear, calm skies by 10:00 am.
