What does the weather information (like pressure, temperature, rainfall, etc) change at one location during a cold front passage?

The graphs below outline the changes in 4 weather variables during this strong frontal passage in April, 2005 in Charleston, WV.

Questions to address for weather variations at one location

Compare and contrast the following time series:

–         Precipitation and solar energy

–         Pressure and temperature

–         Precipitation and pressure

–         Temperature and solar energy

For the time series from Charleston, West Virginia, how do these variables indicate a frontal passage?

–         Precipitation

–         Temperature

–         Radiation

–         Pressure

At approximately, what date and time did the front pass through Charleston, WV?