Baltimore residents are in for a shift in weather as a cold front moves through the southern and eastern parts of the region early today, according to the National Weather Service Baltimore MD/Washington DC. The latest forecast discussion provided by the National Weather Service predicts a period of cooler, below-normal temperatures setting in across the area for much of the coming week.
A few showers may persist along the boundary, mainly to the east of the Blue Ridge Mountains early this morning as the front pushes on; meanwhile, parts of the west and southwest may see patchy fog through mid-morning today, once the fog lifts, those areas can expect a gradual influx of cooler and drier air throughout the day, which, considering high temperatures will be hovering in the 70s to near 80 degrees, marks a cooler departure from recent averages, come tonight, temperatures will be dropping further into the 50s for most, and around 60 along waterfronts and in metro areas.
Throughout Tuesday and into Wednesday night, broad high pressure is forecast to cement the cooler weather pattern, with daytime highs struggling to surpass the low 80s and overnight lows anticipated to be the coldest since the waning days of spring, dropping into the 50s across the region, and flirting with near 60 along waterfronts and inner cities. In select localities, the potential for patchy frost is not out of the question on Tuesday night, which speaks to the unexpected chill grasping the region in this waning summer moment.
Extending into the weekend, sunny skies and dry conditions courtesy of Canadian high pressure will maintain the trend of below-average temperatures; high temperatures will consistently play in the symphony of the 70s to low 80s, with the beloved highland areas observing a cooler range in the 60s and overnight lows tumbling into the 50s to low 60s, excepting the high elevations where the 40s will cement their cooler resolve, the dry cold front arriving Friday into Saturday looks to serve up the period's coolest day, reinforcing this stretch of crisp air.
On the aviation front, visibility restrictions due to patchy fog could pester early morning flights, especially at CHO, but after the clearing of the cold front and lifting of the fog by mid-morning, VFR (Visual Flight Rules) conditions are expected to prevail through Friday with no significant adverse weather projected. Similarly, marine outlooks suggest only the possibility of an occasional shower or even a thunder rumble over parts of the northern Chesapeake Bay this morning, with winds on the waters potentially reaching Small Craft Advisory conditions due to the incoming high pressure and cooler air surges tonight into Tuesday.
As for tides and potential coastal flooding, the National Weather Service notes that water levels will slowly recede until the cold front fully clears the area. Winds shift to the northwest, but any subsequent minor flooding is expected to be "threshold in nature" at a handful of locations. Annapolis warrants a Coastal Flood Advisory through the morning high tide period.
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