Snippet from Mount Holly morning AFD focused on Saturday-
Low pressure lifts northward into Ontario Friday night into Saturday with a strengthening southerly flow developing in the warm sector over the area ahead of an approaching cold front. This will ratchet up the mugginess even further with dewpoints potentially reaching over 75 degrees in some areas by Saturday afternoon. Combined with forecast highs for Saturday once again in the upper 80s to low 90s for most areas, this could bring peak heat indices in the range of 102 to 107 degrees, meaning heat headlines would be needed if this forecast holds. The synoptic scale lift provided by the cold front along with abundant moisture looks to result in widespread showers and storms by Saturday afternoon into the evening. And at this point, both severe weather and flash flooding look to be a threat. We remain particularly concerned seeing progged PWat values by both deterministic models and ensembles in the range of 2.25 to 2.5 inches which is again is close to climatological maxes.