Brian's exclusive forecast for Annapolis: Mostly sunny, breezy, and cool today with a high in the mid 60s. North wind 10 to 15 m.p.h. Clear and cool overnight with a low in the mid to upper 40s, except lower 50s near the bay shore. Mostly sunny on Tuesday, but a bit warmer with a high in the lower 70s. The extended outlook calls for clouds and sun on Wednesday and Thursday with lows in the low to mid 50s and highs in the low to mid 70s.
The first full day of the autumn season will feel like fall with a cool northerly breeze. Fortunately, the cooler temperatures will be offset by bright sunshine and a cobalt blue sky. Even with the sun, however, temperatures will struggle to reach the middle to upper 60s by afternoon. As high pressure continues to build over the bay region, and as winds diminish later tonight, the mercury will dip into the 40s by Tuesday morning. Areas right along the bay will remain in the lower 50s due to the still-warm waters of the Chesapeake. The same area of high pressure will result in a continuation of sunny, mild days throughout much of the upcoming week. We will experience a slight warming trend with afternoon readings slowly climb into the lower to middle 70s. An upper low may brings some clouds to the area by mid-week, but sunny weather returns for Thursday and Friday.
On the Maryland portion of Chesapeake Bay, a Small Craft Advisory is in effect through late this morning. Winds today will come out of the north at 10 to 20 knots with a few higher gusts and waves of 1 to 3 feet, diminishing later this afternoon to 10 to 15 knots with waves of 1 to 2 feet. Winds tonight will come out of the north at less than 10 miles per hour 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 September 23 is 75 degrees and the average low is 55. The records at Baltimore on this date are 98 degrees in 1970 and 40 degrees in 1983. 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.