Broome and Chenango join Delaware in New York and Susquehanna and Wayne Counties in Pennsylvania on the watch list for possible flash flooding from Isaias.
The National Weather Service has issued a Flash Flood Watch from noon June 20 to 1 a.m. June 21 for portions of central New York and northeast Pennsylvania.
National Weather Service in Binghamton says there is a possibility of isolated flash flooding from a strong cold front poised to move through the Twin Tiers.