Baltimore residents can expect a continuation of dry weather with low humidity through Thursday, thanks to the dominance of a broad high-pressure system. According to the National Weather Service, the fair weather spell is however forecasted to break by the weekend as an incoming low-pressure system and series of fronts are set to introduce precipitation chances to the region.
As of the early hours of Wednesday, high pressure stretching from the Great Lakes into the Mid-Atlantic has been keeping the nearest front, stalled near the Gulf Coast, at bay, as per the meteorological analysis. Despite current VFR (Visual Flight Rules) conditions across all terminals and temperatures residing comfortably in the 60s, some readings nearing the upper 50s were noted in areas that have fully decoupled. Temperatures are projected to rise today, reaching the mid-80s in most spots, while mountain locales anticipate cooler climates in the 70s.
Visibility might encounter minor reductions throughout the day, as a result of what the weather service calls Canadian wildfire smoke that could enter the mid/upper troposphere. The haze predicted for certain areas east of U.S. 15 is not expected to affect ground-level conditions significantly. This evening and into the overnight period, the sky is predicted to remain mostly clear, with temperatures expected to settle in the 60s, dipping into the mid/upper 50s further to the west from the Blue Ridge.
Thursday will usher in one more dry day ahead of the wetter period approaching by the weekend. Notably, the anticipated humidity typical of this time of the year is being held at bay by a persistent north-to-northwesterly wind. As the longwave trough moves over the Great Lakes toward the end of the week, clouds are expected to accumulate bringing showers and possibly, thunderstorms by late Friday. "Conditions will also be milder as a warm front pushes through overnight," with low temperatures varying from the mid-60s to low 70s, especially across areas of D.C. and Baltimore, as the weather service detailed.
Marine conditions in the meantime will see a fairly persistent northerly wind over the next couple of days, with gusts potentially reaching the 10 to 15-knot range. A switch to southerly winds is anticipated by late Thursday into Friday, ramping up chances of Small Craft Advisories on the waters. For coastal areas, tidal anomalies remain low but could see some increase with southerly winds expected later in the week. Locations accustomed to flooding like Havre de Grace and Annapolis might see water levels approach minor flooding stages.
