Weather with Bill Evans

Good Day on This Friday September 18, 2020 Low pressure moves southeast of Long Island Friday and well out into the Northern Atlantic Ocean Friday night. High pressure will build into the local region from the Great Lakes and Southeast Canada Friday night into the weekend. The high will gradually weaken and shift south and west of the area early into mid week, while tropical cyclone Teddy possibly nears far Northern New England and the Canadian Maritimes. Today, the cold front will be offshore but will slow down as it encounters the remnants of Sally. The front will slowly move farther offshore through the day. Rain showers will be around for Eastern Long Island and Southeast Connecticut early this morning and then drying conditions will return as flow increases out of the north. Dewpoints will lower during the day and some substantial decrease in 850mb temperatures will make a cool and less humid day. Clouds are expected to slowly decrease, lasting longest across Eastern Long Island. Temperatures mostly in the mid 60s to lower 70s. There is a moderate risk of rip currents at the Atlantic Ocean beaches today. With high pressure continuing to move in and slight upper level ridging, clouds will decrease more tonight into Saturday. A mid level trough approaches Saturday night and moves across Sunday, exiting south of the region Sunday night. At the surface, high pressure will arrive from the Great Lakes and Southeast Canada and will provide dry conditions and mostly clear conditions during this weekend. For both tonight, Saturday night and Sunday night, winds will be a mitigating factor for frost but for most interior spots, winds will be lighter and therefore with temperatures getting down to the mid 30s for some areas, put in patchy frost into forecast grids. Lows overall will range from the mid 30s to around 50. Highs this weekend will generally be in the low to mid 60s. In addition, high surf, beach erosion, and beach flooding will will develop Sunday and continue into early next week. There is a moderate risk of rip currents at the Atlantic Ocean beaches Saturday. Strengthening high pressure over the Northeast will remain nearly stationary until early next week before weakening and shifting south and west of the area by mid week. Aloft, an upper trough translates eastward across the Northeast and offshore late Sunday into Monday. The latter of which will interact with Tropical Cyclone Teddy. Refer to the latest official forecasts from NHC. Global guidance has come into better agreement. The upper trough closing off east of New England steers the system to toward far northern New England and the Canadian Maritimes Tuesday into Wednesday. This would have no more impact than keep the area under a dry NW flow. Before then though, the area will reside in NE flow Saturday through Monday which at times will gusts up to 20 mph, especially along the coast. Under mainly clear skies, temperatures will be close to 10 degrees below normal for the last few days of summer before rebounding back to near normal by mid week. High surf, beach erosion, and beach flooding will continue into early next week. .MARINE... Hazards remain the same as before with the small craft advisory. All marine zones have SCA for today and tonight. Then just the ocean with the SCA continuing all the way from Saturday through Saturday night. A persistent NE flow and swells from Teddy will result in building seas on the ocean and gusts near SCA criteria from Sunday through Tuesday.