The streak is over. For the first time in over two weeks, temperatures are not above 90 degrees this afternoon, as most places reach daytime highs in the mid-80s. Perhaps more “rare” is the extensive cloud cover and periodic rain moving through the region. While we’ve been watching for a severe weather threat, it seems as if the all-day cloudiness has tempered that risk a good deal across a majority of the area. The best odds for severe weather continues to be over the southern half of the area, but it’s possible we don’t get much more around here than what we see now -- scattered showers and sub-severe storms.
Through Tonight: A considerable risk of showers and storms (60% early) continues into the evening before winding down overnight (20% by midnight). There’s also a slight chance of severe weather, mainly in the form of isolated damaging winds, and mainly south of D.C. Any rainfall could also be temporarily heavy with maybe some localized flash flooding. After midnight, skies are partly cloudy as lows reach the upper 60s to mid-70s.
Tomorrow (Thursday): As today’s mini storm system moves out we should see a return of at least some sunshine tomorrow. A little bit of remnant energy could boost cloud cover from time to time as well as potentially spit out a shower or thundershower in the afternoon. Otherwise, it’s rather warm and humid with highs reaching the upper 80s to near 90.
Ranking the streak: Finishing with 16 days at-or-above 90 degrees in a row, the heat wave we just went through ranks as one of the lengthiest in history. But it fell a bit short of the top mark. 1993 also came in with a streak of 16 days. Both 1872 and 1999 had lengthier streaks of 18 days each, and the years of 1980 and 1988 remain on top with 21-day streaks.
Pollen update: Walter Reed’s Susan Kosisky writes, “Tree pollen is LOW at 1.28 gr/cubic meter, grass pollen is LOW at 1.92 gr/cubic meter and weed pollen is LOW (NAB range) at 5.11 gr/cubic meter which is more MODERATE for our area weed count. Mold spores are in the MODERATE range at 7680.46 spores/cubic meter.”