*Heat Advisory in Effect Tuesday from noon to 8pm*
Get ready. The summer's most extreme heat is on the way. Tuesday and Wednesday's combination of heat and humidity will be downright brutal. The good news: more tolerable summer weather returns Thursday through the weekend.
TodayHot and quite humid. A few storms?
Last night's warm front passage will allow an uncomfortably humid airmass to build into the region. Expect partly sunny skies and highs in the low 90s. But factoring in the humidity, and it will feel like the upper 90s. A few storms could develop (25% chance) -- especially north of the area near a weak frontal boundary. Overnight, it will be partly cloudy and muggy, with lows 70-75 (suburbs-city).
The Upcoming Week at a GlanceWarmest Day:
Wednesday, 100.Coolest Day:
Sunday, 87.Rain Chances:
Every weekday afternoon or evening (25-30%)Dry Days:
The weekendThe Week's Wild Cards:
How hot will it get Tuesday and Wednesday? Will afternoon and evening thunderstorms provide measurable, much-needed rain for widespread areas or just a few scattered locations? Will the weekend really
be dry and more comfortable?Climatological Average High/Low:
88-87/71-69Pictured: Dawn breaks over the city lights below. The photo was taken from a jet approaching Dulles Airport early Saturday morning by CapitalWeather.com photographer Kevin Ambrose. Click to enlarge.
Compared to the heat wave several weeks ago
, this heat wave will pack more of a punch due to higher levels of humidity. Temperatures should reach the upper 90s to near 100, but maximum heat indices will be near 105. A few isolated storms late in the day could produce some downpours (25% chance) -- but most areas will remain bone dry. Overnight conditions will be downright sultry in the city, with lows barely shy of 80 downtown (low 70s in the suburbs).
WednesdayOppressive heat and humidity. Storms late?
Just like past heat waves this summer, mercifully this heat wave will not last that long. High temperatures should again near 100 degrees with maximum heat indices near 105 but this should be the last day of suffocating heat and humidity. A backdoor cold front will approach the area from the northwest late possibly triggering some thunderstorms during the late afternoon and evening (30% chance). Overnight, look for partly cloudy skies with lows 70-75 (suburbs-city).
ThursdayNot as hot -- possible afternoon showers and storms.
Thursday should be a lot like Sunday (yesterday) with more clouds than sun but cooler and less humid conditions than the preceding days. Highs should range from 85-90. A warm front may approach late in the day with some accompanying scattered showers and thunderstorms (30% chance). Some showers may linger overnight, with lows 70-75 (suburbs-city).
FridayVery warm and humid. Storm threat again late.
Thursday's warm front passage will bring a brief return of heat and humidity but not of the same magnitude as early in the week. High temperatures should range from 88-92. A cold front will approach late in the day, bringing yet another chance of scattered afternoon and evening storms (30% chance). Overnight, it's likely to be partly cloudy with lows 67-72.
The WeekendNot as humid, seasonably warm.
The way it looks now, cooler and less humid air will move into the region courtesy of high pressure to the northwest. Afternoon highs will likely be in the upper 80s, with lows in the 60s to around 70 (suburbs-city). Rain chances should be pretty low.