Synoptic upper pattern will change little Tuesday with belt of stronger winds over the northern tier of states. Embedded within this regime, a low-amplitude shortwave trough now moving into the northern High Plains will continue east into the upper MS Valley and Great Lakes. In wake of this feature heights will rise over the
northern High Plains during the day. However, a secondary impulse is forecast to reach central and eastern MT later Tuesday night. At the surface a cold front will continue southeast through WI and MN with
trailing portion of this boundary likely to become quasi-stationary across NE.
A general risk is in place for parts of central and eastern Pennsylvania, while the western section remains dry. Temperatures will remain in the 80’s for most areas, and the 90’s for other areas. Heat indexes may reach above 90 for some areas in the state. Storms are to remain below a severe level, and may be isolated. Keep following the Pennsylvania Weather Authority for more updates and local weather.