Baltimore is in the grip of a heatwave with the National Weather Service predicting "a prolonged period of very hot weather" expected through midweek. Temperatures are anticipated to hit triple digits across the region due to a high-pressure ridge over the eastern United States. National Weather Service Baltimore MD/Washington DC forecasts high temperatures ranging between 98 and 101 degrees.
Overnight, the city struggled to cool down, with temperatures lingering well into the 70s, accompanied by high humidity. Toasty conditions are set to continue despite a potential for showers and thunderstorms later in the week. The oppressive heat has triggered a slew of Extreme Heat Warnings and Heat Advisories in place from 11 AM to 9 PM, as per the National Weather Service's guidance.
The stifling weather is not only uncomfortable but hazardous, with heat indices ranging from 100 to 110 degrees. Warnings are in effect across the Baltimore and DC area, demanding residents to seek ways to stay cool and hydrated. According to the forecast, with 500-mb heights around two standard deviations above late June climatology, cooling is not expected anytime soon.
In light of the heat, storm chances remain marginal, with a strong anticyclone aloft keeping the skies mostly clear of clouds and showers. When asked, however, the forecast does call for possible thunderstorms over the central Virginia Blue Ridge, which could develop strong downbursts. In the urban centers of the Mid-Atlantic, residents should brace for further heat with little to no relief in sight overnight.
Looking ahead, the weekly forecast suggests that although high temperatures may drop slightly by Wednesday and Thursday due to a 3 to 5 dm drop in mid/upper ridge heights, the risk for severe weather will increase, and thunderstorm activity is more likely. More thunderstorms are possible through the end of the week, raising concerns about localized flooding.
For marine interests, the ongoing heatwave is resulting in sub-advisory level winds and increased chances for thunderstorms in the coming days. Coastal areas are advised to remain vigilant, given the elevated water levels at tidal sites due to the high temperatures.
According to the National Weather Service data, multiple temperature records may be tied or broken during this period. Climate data reveals that current heat levels are indeed outlier events for this time of the year, clearly illustrating the intensity of this heat event.
