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Chesapeake Bay weather for January 18: mostly sunny and colder

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

Today: Morning clouds and flurries, then mostly sunny. Breezy and colder with a high in the upper 30s.

Tonight: Variable cloudiness with a snow shower possible. Low in the mid 20s.

Sunday: Morning cloudiness followed by afternoon sunshine. High around 40.

Sunday Night: Becoming cloudy with a low in the mid 30s.

Monday: Clouds and sun with an afternoon rain shower. Milder with a high near 50.

The extended outlook calls for a chance of a snow shower on Tuesday. Colder with a low in the lower 20s and a high in the upper 20s. Mostly sunny and cold on Wednesday with a low around 15 and a high near 20. A chance of snow on Thursday with a low around 15 and a high around 20. Mostly sunny on Friday with a low around 10 and a high near 30.

A cold front will moved from west to east across the Chesapeake overnight. Precipitation associated with the frontal passage fell in the form of snow showers, mainly across northern Maryland where a dusting to an inch of snow has been reported. Temperatures this morning are colder now that high pressure is building in behind the cold front, which sits to our east. Consequently, highs today will be cooler with readings in the mid to upper 30s by afternoon. Another cold front will move from west to east across the bay tonight into early Sunday. This front may once again produce scattered snow showers with a dusting possible in some areas. The mercury will drop into the mid 20s by morning. On Sunday high pressure will move offshore and a southerly flow will enable afternoon temperatures to recover into the upper 30s to lower 40s. Yet another cold front will approach the region from the west on Monday. Temperatures will climb into the 40s to near 50 ahead of the front, but then drop into the mid 20s by Tuesday morning. Cold high pressure will dominate the weather pattern from Tuesday through Friday. Highs on Wednesday and Thursday will only be around 20 with overnight lows in the teens. There will be two opportunities for snow this week. The first will come on Tuesday as a clipper system moves through the region and produces snow showers. The second opportunity for snow will come on Thursday with a chance of a light accumulation. Cold weather persists into next Friday and Saturday with lows in the upper 10s to lower 20s and highs around the freezing point.

On the Maryland portion of Chesapeake Bay, a Small Craft Advisory is in effect through Saturday afternoon. Winds on Saturday will come out of the west at 10 to 20 knots with gusts over 20 knots and waves from 1 to 3 feet. Winds on Saturday night will come out of the west at 10 to 15 knots with gusts over 20 knots and waves from 1 to 3 feet. A slight chance of snow showers and fog. Winds on Sunday will come out of the southwest at 10 to 15 knots with gusts over 20 knots and waves from 1 to 2 feet. A slight chance of snow showers in the morning. Winds on Sunday night will come out of the southwest at 10 knots with waves around one foot. Winds on Monday will come out of the west at 10 knots with waves around one foot. 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 January 18 is 41 degrees and the average low is 24 degrees. The records at Baltimore on this date are 68 degrees in 1990 and -4 degrees in 1957. Today's sunrise will occur at 7:23 and the sunset will occur at 5:11. 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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