1-Remnants of Rosa bringing drenching rains to 4 corner states
2-The merger with the upper level energy that will shoot Rosa on east through our zonal flow.
3-Moderate rain and thundershowers that will push east throughout the day and evening tonight in the northeast.
We have our southern high helping with a little pre-frontal warm sector building. Our unique low slipping along with its strong cold front in tow.
To the east always be wary of these snaking fronts as they change surface wind flow around and create crossing patterns that can lead to severe weather. Pennsylvania is the target today.