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Chesapeake Bay weather for March 6: evening update

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

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Tonight: Increasing clouds with a slight chance of light sleet or freezing rain late. The low will be in the upper 20s to lower 30s.

Friday: A chance of light freezing rain or sleet early, then occasional rain showers. The high will be in the upper 30s.

Friday Night: Scattered rain showers and areas of fog with a low in the mid 30s.

Saturday: Clouds giving way to afternoon sunshine. Warmer with a high in the low 50s.

The extended forecast calls for a mostly sunny sky on Sunday with a low in the mid 30s and a high in the upper 40s to lower 50s. Mostly sunny on Monday with a low in the mid 30s and a high in the upper 50s. Mostly sunny on Tuesday with a low in the mid 30s and a high in the upper 50s. A chance of rain showers on Wednesday with a low in the lower 40s and a high in the upper 40s.

Canadian high pressure developed over the Middle Atlantic region today with cold temperatures as highs only reached the mid to upper 30s after morning lows in the mid to upper 20s. There was plenty of sunshine today, but thermometer readings ran about 15 degrees below seasonal averages of 50 degrees. Meanwhile, an area of low pressure is developing to our south and will move up the coast on Friday. The majority of the precipitation from this system will impact southeast Virginia, southern Maryland, and coastal Maryland and Delaware; however, some precipitation will likely make its way northward to Annapolis and Washington. Depending on the arrival of the moisture, temperatures may be cold enough at the surface to produce a brief period of mixed precipitation on Friday in the form of light sleet or freezing rain. Some light snow is possible in the Richmond VA area as well. As the storm brings in milder air from the Atlantic, all precipitation will change over to rain. Rain showers will continue through Friday night and into Saturday morning, with the heaviest rain to the south and the east. Temperatures will be chilly on Friday with the falling rain, but readings will be above freezing with highs in the lower 40s. As the storm pulls away from the coast on Saturday, a milder pattern will become established. The period Sunday through Tuesday will feature sunshine and moderating temperatures with highs in the upper 40s on Sunday and the upper 50s on Monday and Tuesday. Looking ahead to later next week, a cold front will produce rain showers on Wednesday with colder temperatures as highs drop from the upper 50s on Tuesday to the upper 40s on Wednesday. A storm system may impact the region later next week with rain and/or snow.

On the Maryland portion of Chesapeake Bay, a Small Craft Advisory is in effect through Friday afternoon. Winds tonight will come out of the northeast at 10 to 15 knots with gusts over 20 knots and waves from 1 to 3 feet. Winds on Friday will come out of the north at 10 to 15 knots with gusts over 20 knots and waves from 1 to 3 feet. Visibility may be reduced in rain and fog on Friday. 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 March 6 is 50 degrees and the average low is 31 degrees. The records at Baltimore on this date are 76 degrees in 1935, and 13 degrees in 1901 and 1956. Today's sunrise will occur at 6:32 and the sunset will occur at 6:04. Weather data courtesy of the National Weather Service. For more weather updates, please visit my web site www.chesapeakebayweather.com, 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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