Brian's exclusive forecast for Annapolis: A cool start to the day with readings in the upper 40s to lower 50s, then sunny and warmer with highs in the mid 70s. Light south winds. Mostly clear but not as cool overnight with a low in the mid to upper 50s. On Friday, expect a mostly sunny sky with fair-weather clouds. It will be warmer with a high in the lower 80s. Looking ahead to the weekend, plan for clouds and sun on Saturday with a chance of an afternoon shower or thundershower and a high in the low to mid 80s. On Sunday, morning cloudiness and scattered showers will give way to afternoon clouds and sunshine. The high will be in the upper 70s.
Another cool morning on the bay with readings from the upper 40s to lower 50s. High pressure overhead, along with calm winds, has resulted in ideal radiational cooling. Some locations, particularly on the Eastern Shore, may experience some early-morning fog as well. As we move through the day, the center of high pressure will move to the east and a return flow around the high will allow temperatures to climb into the middle 70s. A southerly flow will continue on Friday with a mostly sunny sky and readings in the lower 80s. A cold front will approach the area from the west on Saturday and there is a chance of afternoon showers or thundershowers as the front nears the bay. Warm air ahead of the front will result in high temperatures in the low to mid 80s. As we move into Sunday, the front will begin to clear the area and winds will shift to the north/northwest. Highs on Sunday will be in the upper 70s.
On the Maryland portion of Chesapeake Bay, there are no current advisories. Winds today will come out of the south at less than 10 knots with waves less than one foot. Winds tonight will come out of the south at less than 10 knots with waves of less than one foot. On Friday, winds will come out of the south at less than 10 knots with waves of less than 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 September 19 is 77 degrees and the average low is 56. The records at Baltimore on this date are 94 degrees in 1983/1957 and 42 degrees in 1959. 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.