Brian's exclusive forecast for Washington DC:
Tonight: Mostly cloudy with a few rain showers. Breezy at times. Low around 40.
Saturday: Mostly cloudy early with a shower, then clouds and sun. High 65 to 70.
Saturday Night: Mostly clear and turning colder with a low in the mid 30s.
Sunday: Increasing clouds with rain showers later in the day. The high will be near 45.
The extended forecast calls for a chance of mixed rain and snow on Monday with a low around 30 and a high near 35. Mostly sunny on Tuesday with a low in the mid 20s and a high near 40. Clouds and sun on Wednesday with a low around 35 and a high near 55. A chance of rain showers on Thursday with a low around 40 and a high near 55.
A changeable weather pattern will occur over the next few days. Tonight, a cold front will move from west to east across the region and produce scattered rain showers through the early morning hours on Saturday. Once the sky clears during the day, afternoon highs on Saturday will reach the mid 60s to near 70 degrees. Meanwhile, high pressure will build down into the Middle Atlantic region from Canada on Saturday night and Sunday. This will send the mercury tumbling into the 30s overnight Saturday with highs on Sunday only in the 40s. At the same time, an area of low pressure will develop to our southwest and track toward eastern North Carolina. Precipitation from this low will override cold, dry air at the surface and produce afternoon and evening rain showers on Sunday that will mix with, and change to snow by Monday morning. The track and intensity of this low is yet to be determined, and slight changes in the track will have a significant impact on where accumulating snow falls. Another issue is the timing of the change over to snow. If the change occurs during the overnight hours, then snow will likely accumulate across the region with snow even covering paved surfaces. If most of the snow falls during the day on Monday, the solar energy from the mid-March sun will allow for the snow to melt on paved surfaces. Computer forecast models are presenting a wide range of scenarios for Baltimore, Washington, and Annapolis with anywhere from mixed rain and snow with no accumulation to a significant accumulation of more than 6 inches. More updates will be posted throughout the weekend, but it is looking more likely that winter will be making its presence felt once again.
On the Maryland portion of Chesapeake Bay, a Small Craft Advisory is in effect through Saturday evening. Winds tonight will come out of the south at 10 to 20 knots with gusts over 25 and waves up to 3 feet. Winds on Saturday will come out of the west at 10 to 15 knots with gusts over 20 and waves up to 3 feet. Winds on Saturday night will come out of the north at 10 to 15 knots with gusts over 20 and waves from 1 to 2 feet. Winds on Sunday will come out of the northeast at 10 to 15 with gusts over 20 and waves from 1 to 2 feet. Visibility may be reduced in snow, rain, and fog on Sunday. Marine information is provided only as a guide. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.
Click here for the average March lows and highs for Baltimore. Click here for the average March lows and highs for Washington DC. Click here for the sunrise and sunset times. 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.