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Chesapeake Bay weather for December 10: Morning snow burst then turning colder

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

  • Today: Rain and sleet developing, then changing to snow. The snow may be heavy at times. Snow accumulating 2 to 4 inches with isolated amounts over 4 inches. Clearing this afternoon. The high will be around 35, but falling into the lower 30s.
  • Tonight: Clearing and cold with a low around 18.
  • Wednesday: Sunny but cold with a high near 32.
  • Wednesday Night: Clear and cold with a low around 12.
  • Thursday: Sunny but cold with a high in the mid to upper 20s.
  • Thursday Night: Clear and cold with a low around 12.
  • Friday: Mostly sunny and cold with a high near 32.
  • The extended forecast calls for a chance of rain and snow over the weekend with lows in the upper 20s and highs in the upper 30s.

Temperatures at 6 a.m. are marginally cold on the western shore of Chesapeake Bay with most locations reporting thermometer readings in the mid 30s. Precipitation will begin to fall in the form of rain and/or sleet in the Annapolis area, and then change to snow during the morning. An arctic cold front will approach Chesapeake Bay today and low pressure is expected to develop along the front, providing the Middle Atlantic region with another round of snow. Low pressure will develop along the front and produce a period of snow from about 7 a.m. through noon, followed by a clearing sky. Although the area of low pressure is not all that strong, upward motion within the system may produce a burst of heavy snow in some areas (possibly exceeding 1 to 2 inches per hour for a few hours.) Where this heaviest area of snow sets up is not certain, but it will occur near the Annapolis area or just to the south and east. Surface temperatures will fall into the lower 30s during the heavy snow and roadways will become snow-covered and icy as a result. Once the system moves to our east, cold high pressure will build overhead and temperatures will drop into the upper 10s 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, a Small Craft Advisory is in effect from this afternoon through tonight. Winds today will come out of the northwest at 10 knots with waves around one foot. Reduced visibility in snow and fog. Winds tonight will come out of the northwest at 10 to 15 knots with waves from 1 to 2 feet. Winds on Wednesday will come out of the west at 10 knots with waves around one foot. 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 10 is 47 degrees and the average low is 29 degrees. The records at Baltimore on this date are 72 degrees in 1966 and 1 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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