“Uncomfortable” is a fair way to assess the weather this afternoon. Humidity levels maxed out today as we tapped into some moisture rich air from the Gulf of Mexico. Heat advisories were eventually dropped for the region, with the heat index hovering right around 100 in the warmest spots, a good 5 degrees below advisory level. But you don’t need a heat advisory to tell you what you can already feel, uncomfortable.
Through Tonight: Isolated storms are possible (20 percent chance) through the early evening, though coverage will be very spotty, similar to yesterday. With no large scale forcing, most of us will stay dry under partly cloudy skies. Warm and muggy once again tonight, with low temperatures ranging from 70-76 degrees. Winds from the southwest remain elevated overnight at 10 to 15 mph.
View the current weather at The Washington Post.
Tomorrow (Monday): Tomorrow is a transition day, with a strong cold front expected to pass through the region sometime in the late afternoon. Showers and thunderstorms will be firing up out ahead of the front, with an elevated risk at some severe weather tomorrow afternoon. A mix of sun and clouds with highs ranging from 83 to 87 degrees and dew point values in the low 70s. The time frame for storms in the D.C. area looks to be between 4 and 8 p.m., with heavy rain, lightning and strong straight line winds possible in the stronger cells. Storm chances should decrease overnight as we start to dry out. Low temperatures are in the upper 60s.
Invest 93L: The National Hurricane Center has upped the chances that this current blob of energy, Invest 93L, located over the Yucatan Peninsula will reach tropical storm strength over the next few days. It’s not much to look at now, but conditions in the Gulf of Mexico will become more favorable for formation over the next 48 hours, which is likely when Bret will officially be christened. With no true storm center to focus on, model track forecasts will remain at low confidence until the storm ultimately forms. If and when Bret does form, its biggest impacts may not be felt until later in the week in the form of heavy rain along already over-saturated Gulf Coast communities.
— Michael Lowry (@MichaelRLowry) June 18, 2017
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