The National Weather Service Baltimore MD/Washington DC has issued a weather outlook for Baltimore and the surrounding regions that includes a period of calm weather followed by a potential stormy weekend. High pressure is expected to keep conditions dry, with below-average temperatures and lower humidity through Thursday, according to the NWS Baltimore/Washington forecast.
In the short-term forecast, a 1027mb high centered over Michigan will slide towards New England by Wednesday, remaining offshore by Thursday. This high-pressure system, combined with H5 ridging, will maintain the dry spell through to Wednesday night, and most of Thursday. However, lower-level clouds are expected to develop Wednesday night, leading to increased cloud cover on Thursday. Temperatures are forecast to range in the mid to upper 70s, with cooler temperatures in higher elevations. Overnight lows are anticipated to drop to the 40s in outlying areas, with 50s to near 60 elsewhere, creeping up slightly on Wednesday night due to increasing clouds and dew points.
For the aviation forecast, VFR conditions will extend through Wednesday, with a shift toward east/northeasterly winds and clear skies. However, sub-VFR ceilings could come into play late Wednesday night, especially at CHO airport. As the weekend approaches, the deterioration of the surface will increase the likelihood of precipitation, leading to possible sub-VFR conditions, especially from late Friday into Saturday. Winds will shift quickly to northwesterly by Saturday evening as a strong cold front arrives, hinting at improved conditions concluding the weekend.
Marine conditions currently show high-end Small Craft Advisory (SCA) winds in the early hours for the lower Potomac and Bay, but these are expected to subside as the day progresses. The east-to-southeast winds persist into Thursday while the high pressure moves offshore, with possible marginal SCA conditions in certain areas. Anticipate southerly flow to pick up on Saturday ahead of the cold front, potentially necessitating Small Craft Advisories and Special Marine Warnings due to stronger thunderstorms, explained the National Weather Service.
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