The National Weather Service in Binghamton has issued a Flood Advisory until 12:30 pm (April 20th) for Western Broome, Chemung and Southern Cortland, Tioga and Tompkins Counties in Central New York.
The Weather Service is reporting that at 9:25 pm , Doppler radar indicated heavy rain that will cause minor flooding in the advisory area. Up to one inch of rain has already fallen in a stripe from northern Bradford to southern Cortland county, especially through Owego and Marathon.
Some locations that will experience flooding include: Chemung, Ithaca, Elmira, Vestal, Cortland, Johnson City, Endicott, Southport, Barton and Big Flats.
Additional rain was moving into the area and will add to totals already on the ground. This rain will be heavy at times and likely cause minor flooding of poor drainage areas, ditches and urban storm drainage.
The Flash Flood Watch continues for portions of central New York and all of northeast Pennsylvania, including the following areas, in central New York, Broome, Chemung, Chenango, Cortland, Delaware, Otsego, Schuyler, Steuben, Sullivan, Tioga, and Tompkins counties.
The Weather Service says a period of heavy rain with thunderstorms is expected to impact the area tonight. Rainfall rates could locally approach or exceed three quarters of an inch per hour at times. Storm total rainfall of 1 to 2 inches, with localized higher amounts around 3 inches are forecast in the watch area.
The combination of wet soils and a heavy amount of rain in a short period of time could result in minor flooding along creeks and the headwater points in the local river basins. Flooding could also occur on low lying roadways, urban and poor drainage areas.
A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation.