Brian’s exclusive forecast for Annapolis: Rain developing today with a high in the mid 40s. South wind 10 to 15. Rain tonight may be heavy at times. Temperature rising into the lower 50s overnight, and then falling back into the 40s by morning. East wind 10 to 15 with gusts over 20 becoming south at 10 to 15 with gusts over 20. Rain on Wednesday morning tapering to rain showers. The temperature will be falling from the upper 40s to the lower 40s. Northwest wind 10 to 20 with gusts over 30 at times. Windy and colder Wednesday night with scattered snow showers and a low in the upper 20s. Northwest wind 10 to 20 with gusts over 20. Sunny, but breezy and chilly on Thanksgiving with a high in the upper 30s.
After two unseasonably cold November days, a low pressure system will move northeast along the Atlantic coastal plain and produce a cold, soaking rain over the bay region. The low will be tracking inland, which will allow mild air to overspread the area and produce a mostly rain event except for the far northern and western suburbs of Baltimore and Washington where cold morning temperatures are allowing for some mixed precipitation at the onset of the storm. Those locations will ultimately change over to rain as well. The storm will produce heavy rainfall over the Middle Atlantic states with 1 to 2 inches possible by Wednesday morning. The heaviest rain is expected from about 3 p.m. this afternoon through midnight. Temperatures will be rising from the 30s this morning to the 40s this afternoon and into the low 50s overnight before the wind shifts to the northwest and cooler air begins to filter into the region. As the storm system departs on Wednesday, strong northwesterly winds may gust over 30 miles per hour at times. Additionally, temperatures will be falling throughout the day. This may cause rain showers to briefly change over to wet snow showers before ending on Wednesday. In the wake of the storm, colder air will move into the region so that the mercury will dip into the upper 20s by Thursday morning and only rise into the upper 30s on Thanksgiving afternoon. Cold high pressure will ensure another cold day on Friday with lows in the low to mid 20s and highs in the upper 30s.
On the Maryland portion of Chesapeake Bay, a Gale Warning is in effect from 6 p.m. this evening through late tonight. A Small Craft Advisory is in effect from Wednesday morning through Wednesday afternoon. A Gale Warning is in effect from Wednesday afternoon through Wednesday night. Winds today will come out of the south and then shift to the east at 10 to 15 knots with waves from 1 to 2 feet. Visibility may be reduced due to rain. Winds tonight will come out of the east at 15 to 20 knots and then shift to the southwest at 15 to 20 knots with gusts over 30 knots and waves from 1 to 3 feet. Winds on Wednesday will come out of the northwest at 10 to 20 knots with gusts over 30 knots and waves from 1 to 3 feet. Visibility may be reduced due to rain and snow showers. Winds on Wednesday night will come out of the northwest at 10 to 20 knots with gusts over 30 knots and waves from 1 to 3 feet. Visibility may be reduced due to snow showers. Marine information is provided as general guidance only. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.
The average high temperature for November 25 is 53 degrees and the average low is 34 degrees. The records at Baltimore on this date are 72 degrees in 1979 and 15 degrees in 1950. Today’s sunrise will occur at 7:02 and the sunset will occur at 4:45. 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.