Baltimore's skies are slated to undergo a bit of a rollercoaster ride, with a mixed bag of weather patterns as we transition from sun-soaked calm to potential thunderous rumbles by the weekend, per the latest feed from the National Weather Service Baltimore MD/Washington DC. A stable high-pressure system lingering near the northeast will take a slow eastward drift throughout midweek, making way for not one, but two cold fronts — the second packing a stronger punch, aiming to cross the area on Saturday.
The immediate term looks mostly calm, with a bit of patchy fog that could linger in the river valleys near sunrise, though any significant obstruction is hindered by mid level clouds, very little fog has developed so far, hindered in some areas by patches of mid level clouds according to the National Weather Service forecast. Temperatures today will be kind, with highs in the upper 70s to near 80, and the mountain regions a bit chillier in the 60s, now, isolated showers could pop up over those higher terrains and a few along the Chesapeake Bay might not be entirely out of the question, though that remains a skippable detail in the current forecast.
As Wednesday rolls in, the high pressure scuttles its way along the eastern seaboard, steering winds to a southerly swing — this is when things start getting interesting. Another disturbance looms in from the Tennessee Valley, yet its most significant effects are predicted to skirt southwest of the cityscape, but a few afternoon showers and possible thunderstorms could make their appearance known, primarily west of I-81, where the moisture is evidently more forward with its presence. The daytime highs will crawl a tad higher to crack into the low 80s.
Thursday ushers in a more formidable scenario as low pressure moves northward, trailing a cold front that's expected to jostle the Appalachians come afternoon time. The setup might not sound too imposing, yet it's prone to stir up a convection cocktail potent enough to spark a squall line of tempests.
Looking ahead to the weekend, Friday introduces height rises bringing about a transient warmth before an upper-level trough ushers in a nippy air influx that's more akin to what you’d expect in late September, meaning that Saturday might be your cue to break out the cozy wear once again. The marine conditions are similarly poised for a rambunctious performance, with advisory-level gusts predicted to sweep into Friday, leading to probable Small Craft Advisory conditions lasting through Sunday.
For tidewater towns, it's a tale of persistent levels with northeast drafts keeping the status quo, but the pivot to southerly winds on Wednesday might just raise the stakes—Annapolis in particular, keeping on the edge of minor flood stage.
