As Pamela's structure dissolved over the mountainous terrain of Mexico on Wednesday, its moisture feed did not.
As the moisture is nearly 4,000 kilometres away from southern Ontario, this is a story that'll come to fruition as we push towards the weekend.
First, Texas has to brace for a significant threat of flash flooding along with a sluggish frontal system filled with moisture from the remnants of Hurricane Pamela.
By Friday, we get another low developing across the central U.S., near the Mississippi Valley. This is the final baton pass that will bring a heavy round of rain across Ontario through Saturday.
Rainfall amounts are still murky, but the highest rainfall amounts might exceed 40 mm through Saturday, but check back for some sensible forecast revision(s) over the coming days.