Brian's exclusive forecast for Annapolis: Mostly clear and chilly overnight with a low in the lower 40s inland, upper 40s right along the bay shore. Light winds. More sun than clouds on Monday with a high in the low to mid 60s. Light southwest winds. Clear and cool Monday night with a low in the upper 40s to lower 50s. Increasing clouds and scattered showers during the day on Tuesday with a high in the low to mid 60s. The extended outlook calls for morning clouds giving way to afternoon sunshine on Wednesday with a high in the mid 50s. Clearing and cold Wednesday night with a low in the mid to upper 30s. Mostly sunny, but unseasonably cool on Thursday with a high in the low to mid 50s. Clear and cold Thursday night with a low in the mid to upper 30s. Mostly sunny, but continued unseasonably cool on Friday with a high in the lower 50s.
High pressure in the Middle Atlantic region will move eastward on Monday and a southwest flow will develop ahead of the next cold front. The front will approach the region from the west on Tuesday and produce widespread clouds and showers from Tuesday afternoon into Wednesday morning. Behind the front, unseasonably cool weather will move into the region. Highs on Thursday and Friday are expected to be nearly 15 degrees colder than the average high of 65, and overnight lows will be 5 to 10 degrees cooler than the average low of 43 degrees. Some areas away from the bay may experience the first frost of the season on Thursday and/or Friday morning, but locations right along the bay shore will remain above freezing with temperatures in the mid to upper 30s. Despite the crisp fall weather on the way, the upcoming week will be mostly sunny except for the showery period of Tuesday afternoon into Wednesday morning.
On the Maryland portion of Chesapeake Bay, no advisories are currently in effect. Winds tonight will come out of the south at less than 10 knots with waves around one foot. Winds on Monday will come out of the south at less than 10 knots with waves around one foot. Winds on Monday night will come out of the south at 10 knots with waves around one foot. 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 20 is 66 degrees and the average low is 44 degrees. The records at Baltimore on this date are 87 degrees in 1969 and 44 degrees in 1940. 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.