Brian's exclusive forecast for Annapolis: Warm and humid overnight with widely scattered thundershowers and a low in the low 70s. Light and variable winds. Hot and humid on Monday with afternoon thunderstorms possible and a high around 90. Thundershowers give way to a mostly cloudy sky on Monday night with a low around 70. Winds shifting to the west/northwest at around 10 mph. Becoming mostly sunny and less humid on Tuesday, but continued very warm with a high in the mid to upper 80s.
Low pressure will move into the southern province of Quebec on Monday, and a trailing cold front will push across the Chesapeake area during the evening. Southwest winds ahead of the front will result in another hot and humid September day on Monday with afternoon highs near 90. During the afternoon and evening hours, instability will increase due to the approach of the cold front, and numerous thunderstorms are expected to develop over the area. Some storms may be severe with heavy rain, strong winds, and damaging lightning. Showers and storms give way to a mostly cloudy Monday night and early Tuesday morning; however, slightly cooler and less humid air will overspread the Middle Atlantic region during the day on Tuesday. Although it will be warm on Tuesday with highs in the middle 80s, it will feel much more comfortable with northerly breezes. Under high pressure and with light winds, the mercury will settle into the low to mid 60s by Wednesday morning.
On the Maryland portion of Chesapeake Bay, there are no current advisories in effect. Winds tonight will be 10 knots or less from the south with waves of 1 to 2 feet. Winds on Monday will be 10 to 15 knots from the southwest, except higher in storms. Waves of 1 to 2 feet are expected. Winds shift to the west on Monday night at 10 knots with waves of 1 to 2 feet. Boaters should be on the lookout for thunderstorms tonight through Monday night, during which time visibility may be reduced due to heavy rain. 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 September 1 is 83 degrees and the average low is 63. The records at Baltimore on this date are 99 degrees in 1962 and 53 degrees in 1963. 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.