If you live in northwestern Pennsylvania, you know the adage by heart: If you don’t like the weather, just wait a few minutes. Keep the saying in mind over the next few days. More: Ice coverage on Lake Erie is above historical average. How frozen over is the lake? Erie County’s due for snow, possibly rain, high winds, a low temperature in the mid-teens, sunny skies and a high around 40 by Friday, according to the National Weather Service in Cleveland. Here’s what’s forecast for Erie County and nearby in the coming hours: Erie weather forecast Monday’s winter weather…..