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Chesapeake Bay weather for December 23: mild with heavy rain showers

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Brian's exclusive forecast for Baltimore, Annapolis, and northern Delmarva:

Today: Cloudy with periods of rain, heavy at times. High 60.

Tonight: Mostly cloudy with scattered showers early. Windy and colder. Low 35.

Tuesday: Clouds and sun, breezy at times. Few snow or rain showers. High 42.

Tuesday Night: Few flurries early, then clearing and much colder. Low 22.

Wednesday: Mostly sunny, but cold. High 32.

The extended outlook calls for a mostly sunny sky on Thursday with a low around 22 and a high near 39. Mostly sunny on Friday with a low in the upper 20s and a high in the lower 40s. Mostly sunny on Saturday with a low in the upper 20s and a high in the lower 40s.

Sunday's weather featured record warmth from South Carolina to Vermont. Temperatures soared into the lower 80s around Norfolk VA and into the upper 60s in Bennington VT. The warmth resulted from high pressure to the east and a cold front approaching from the west that allowed warm air to stream into the northeast states. Currently, a flood watch is in effect for the Maryland western shore through this afternoon as a surge of moisture moves north along a cold front that continues to progress slowly from west to east. Rainfall amounts of one to two inches can be expected in the bay region by afternoon, with showers lingering into the evening hours. The frontal passage will occur overnight and winds will shift to the northwest. Colder, drier air behind the front will overspread the area by morning with temperatures in the middle 30s. An upper-air disturbance will move through the area on Tuesday and may produce scattered rain and/or snow showers. Much colder air charges into the Middle-Atlantic states by Wednesday morning with lows in the lower 20s, and highs on Christmas Day only around the 32-degree mark. High pressure builds over the area during the latter portion of the week with a mostly sunny sky, light winds, and seasonable temperatures with lows each morning in the upper 20s and highs each afternoon in the lower 40s.

On the Maryland portion of Chesapeake Bay, a Small Craft Advisory is in effect from 3 p.m. this afternoon through late tonight. Winds today will come out of the south, but then shift to the northwest at 10 to 15 knots with gusts over 20 and waves from 1 to 3 feet. Winds tonight will come out of the north at 10 to 15 knots with gusts over 20 knots and waves from 1 to 3 feet. Winds on Tuesday will come out of the northwest at 10 to 15 knots with waves from 1 to 2 feet. Visibility may be reduced in snow and rain showers. Winds on Tuesday night will come out of the northwest at 10 to 15 knots with gusts over 20 knots and waves from 1 to 2 feet. Marine information is provided as general guidance. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.

The average high temperature for December 23 is 43 degrees and the average low is 26 degrees. The records at Baltimore on this date are 69 degrees in 1990 and 0 degrees in 1960. Today's sunrise will occur at 7:24 and the sunset will occur at 4:48. Weather data courtesy of the National Weather Service. For more weather updates, please visit my Chesapeake Bay Weather page on Facebook, and if you're heading to Ocean City feel free to check out my Ocean City MD Weather page on Facebook. You can also follow me on Twitter @chesbayweather.




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