Brian’s exclusive forecast for Annapolis: Mostly sunny and hot with a high in the upper 80s. There is a slight chance of an afternoon thunderstorm. Southwest winds around 10 mph. Mostly clear and warm overnight with a low in the low 70s. Light winds. Hazy sunshine on Sunday followed by scattered thunderstorms. It will be hot and humid with a high near 90 degrees. Southwest winds around 10 mph except gusty in storms.
High pressure is currently sitting off the Atlantic coastline this morning. A southerly flow of air around the high will produce warm and humid conditions today with highs in the upper 80s. Although these readings are above average, today’s weather is not all that unusual for late August on the bay. There is a slight risk of an afternoon thunderstorm, but it looks like today will be dry for most of us. There is a better chance for thunderstorms on Sunday with a shortwave trough moving through the area and destabilizing the atmosphere. Sunday’s highs may touch 90 degrees. Moving ahead to Monday, it looks like a cold front will approach the bay from the west. This will result in widespread thunderstorms during the afternoon. It will be hot with a high around 90, perhaps in the low 90s in some areas. In the wake of the cold front, slightly cooler and drier air for Tuesday and Wednesday is expected with overnight lows in the upper 50s to lower 60s and highs in the upper 70s to lower 80s.
On the Maryland portion of Chesapeake Bay, there is a Small Craft Advisory in effect through Sunday morning. Winds today will come out of the south at 10 to 20 knots with waves one to two feet. Tonight, south winds will continue at 10 to 15 knots with waves one to two feet. On Saturday, south winds will increase to 10 to 20 knots with some gusts over 20 knots in storms. Boaters should be on the lookout for thunderstorms each of the next three days, mainly during the afternoon and evening hours. 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. There is a Coastal Flood Advisory today for Anne Arundel County due to tide anamolies.
The average high temperature for August 31 is 83 degrees and the average low is 63. The records at Baltimore on this date are 102 degrees in 1953 and 49 degrees in 1986. 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.