What’s left of Hurricane Florence will soak portions of the Mid Atlantic and New England today into tonight. Some isolated storms and heavy rain showers could drop copious amounts of rain, triggering flood issues.
The remnant low of Florence will shift east from Pennsylvania through southern New England today and tonight, making the hard right turn as it becomes drawn into the baroclinic zone and approaching cold
front entering the region. Modest height falls with the approaching shortwave combined with the lingering right entrance region forcing from an upper jet streak to the northeast will provide the right dynamics to tap into the rich tropical moisture that’s available in the region. With left-over atmospheric moisture from Florence around, precipitable water values are 2-3″ above normal; as such, with the right dynamics, that column of moisture could be rained out of the sky, possibly producing flooding conditions on the ground.
However, the speed of the system will be a limiting factor in terms of the areal coverage of excessive short term rainfall rates. As such, the flash flood threat today will be more limited than it was yesterday and Sunday over portions of the interior Mid Atlantic region.
Tomorrow, Florence’s remnants and the other dynamics around should push off-shore, allowing for a brief break in the unsettled weather across the region.