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Weather with Bill Evans

Good Morning and Happy Friday! Longwave trough lingers over the eastern seaboard this morning. The axis of the trough moves offshore this afternoon as heights begin to rise aloft. Cyclonic flow around the trough and its upper low over the Canadian Maritimes will likely bring scattered to potentially broken stratocumulus through the early afternoon. Forecast soundings indicate moisture trapped beneath an inversion around 3 to 4 kft. This moisture diminishes later in the day and skies should begin clearing late in the afternoon. The East End and CT will lie between low pressure across the Canadian Maritimes and high pressure building from the Great Lakes. The pressure gradient between these two systems continues a gusty NW flow. However, gusts should not be as strong as Thursday peaking around 25 mph on the East End & CT. High temperatures will be in the upper 50s, a few degrees below normal for this time of year. Ridging will build over the East End both at the surface and aloft tonight. The pressure gradient weakens and winds diminish this evening. Good radiational cooling conditions are anticipated with mostly clear skies, light winds, and a dry air mass. Temperatures across the up island areas and interior of southern Connecticut should bottom out in the middle 30s. Areas of frost are possible up island and interior CY above I-95 and the Merritt Parkway. Temperatures should stay above freezing. At the East End and SE CT, temperatures should fall into the upper 30s and lower 40s. The Long Island Pine Barrens likely fall into the middle 30s, and possibility of patchy frost there. Tranquil conditions are forecast Saturday with the surface high pressure and upper ridge overhead. Highs will continue a few degrees below normal in the upper 50s and lower 60s. High pressure moves overhead Saturday night and will be moving offshore Sunday. Light winds and mostly clear sky conditions will lead to ideal radiational cooling. Vast range of lows forecast from guidance. There will be potential for frost for inland valleys and rural sections where lows will be in low to mid 30s and low levels become saturated. The low passing offshore southeast of Long Island Sunday into Sunday night will be extratropical, originating from a tropical disturbance over the Gulf of Mexico a few days prior. The low weakens and lingers nearby offshore Monday. High pressure gets more established in the Canadian Maritimes during this time. The low may impact the region and NAM indicates a more close approach of that low. Forecast has low chances of rain showers on the East End and CT for Sunday afternoon into Sunday night. Dry conditions forecast to return Monday with a brief reemergence of high pressure from the northeast. Have a great weekend!
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