Brian's exclusive forecast for Annapolis: Mostly clear and chilly on tonight with a low in the upper 30s to lower 40s. Sunny on Thursday with a high in the mid 50s. Clear and cold on Thursday night with a low in the mid to upper 30s. Sunny but unseasonably cool on Friday with a high in the lower 50s. The extended outlook calls for a mostly sunny sky on Saturday and Sunday with lows in the upper 30s and highs in the upper 50s.
A cold front is moving across the bay today. Rain showers fell last night and through the morning hours as low pressure moved along the front. At 2 p.m., the sky remains mostly cloudy with a few light showers to the south and east. Partial clearing is expected from west to east later this afternoon. Temperatures at this hour are chilly with readings in the lower to middle 50s. The coldest night of the fall season is on the way with lows by Thursday morning expected to drop into the mid to upper 30s. The National Weather Service has issued a Frost Advisory for counties to the north and west of Baltimore and Washington. Farther north, a Freeze Warning has been issued for counties in south-central Pennsylvania. High pressure will build over the Middle Atlantic region on Thursday and Friday with unseasonably chilly temperatures. Lows will dip into the mid to upper 30s and highs will only reach the lower to middle 50s. Cool October weather is expected to continue through the weekend with a slight moderation in temperatures.
On the Maryland portion of Chesapeake Bay, a Small Craft Advisory is in effect from Wednesday afternoon through Thursday afternoon. Winds tonight will come out of the northwest at 10 to 15 knots with gusts to 20 knots and waves from 1 to 3 feet. Winds on Thursday will come out of the west/northwest at 10 to 15 knots with gusts to 20 knots and waves from 1 to 3 feet. Marine weather information is provided only as a guide. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.
The average high temperature for October 23 is 65 degrees and the average low is 43 degrees. The records at Baltimore on this date are 91 degrees in 1979 and 28 degrees in 1997. 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.