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Chesapeake Bay weather for December 9: milder today then more snow Tuesday

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

  • Today: Light rain this morning giving way to a mostly cloudy sky this afternoon with areas of mist and fog. The high will be in the upper 30s to lower 40s. Southwest wind around 10.
  • Tonight: Mostly cloudy with light rain and snow developing, changing to all snow by morning. The snow may accumulate one to two inches. Low around 32. Northwest wind around 10.
  • Tuesday: Morning snow, then clearing during the afternoon. The high will be in the mid 30s. Northwest wind around 10.
  • Tuesday Night: Clear and chilly with a low in the upper 20s. Light winds becoming near calm.
  • Wednesday: Sunny, but cold, with a high around 32.
  • The extended forecast calls for sunshine and cold conditions on Thursday and Friday with lows in the upper 10s and highs in the upper 20s to lower 30s. Another winter storm may impact the area next weekend.

The first winter storm of the season produced accumulating snowfall in the area on Sunday. Although amounts were minimal (just under an inch in Annapolis and at Baltimore-Washington International Airport), locations across northern Maryland received 6 to 8 inches of snow. Overnight, milder air aloft enabled snow and sleet to change over to freezing rain. With rain falling into surface temperatures that were at or slightly below the freezing point, many areas north and west of Annapolis (and particularly north and west of Baltimore and Washington) experienced icy conditions overnight that will persist until temperatures rise above freezing this morning. Readings this afternoon will slowly climb into the upper 30s to lower 40s, melting the ice and snow from yesterday. Meanwhile, an arctic cold front will approach Chesapeake Bay on Tuesday. Low pressure is expected to develop along the front and provide the Middle Atlantic region with another round of snow. Rain and snow will develop toward morning near the western shore and transition over to all snow. At this time, the area of low pressure will not be all that strong but snowfall amounts could reach 1 to 2 inches in some locations by Tuesday afternoon. Once the system moves to our east, cold high pressure will build overhead and temperatures will drop into the upper 20s by Wednesday morning. The area of high pressure will produce sunny, but cold conditions on Wednesday, Thursday, and Friday with overnight lows dropping into the 10s and daytime highs struggling to reach the freezing point. By next weekend, another area of low pressure may produce rain or snow showers across the region.

On the Maryland portion of Chesapeake Bay, there are no advisories in effect. Winds today will shift to the southwest at 10 knots with gusts over 15 knots and waves up to 2 feet. Winds tonight will come out of the northwest at 10 knots with gusts over 15 knots and waves up to 2 feet. Visibility may be reduced in snow and fog. Winds on Tuesday will come out of the northwest at 10 knots with gusts over 15 knots and waves up to 2 feet. Visibility may be reduced in snow and fog. Marine information is provided only as guidance. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.

The average high temperature for December 9 is 47 degrees and the average low is 30 degrees. The records at Baltimore on this date are 73 degrees in 1996 and 4 degrees in 1876. Today's sunrise will occur at 7:15 and the sunset will occur at 4:43. 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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