Forecast: Heat and humidity reload
FORECAST IN DETAIL
Yesterday's brief, subtle drop in humidity is history. Today is sticky once again and tomorrow and Monday turn downright sultry - similar to Thursday. Through yesterday, we've tallied seven straight days of 90+ and we'll extend the streak to 10 by Monday. Also of interest: 6 out of 6 weekend days have reached 90 or higher so far this month and it looks like we'll close out the month 8/8. When's the relief coming? Tuesday.
Today (Saturday): Whereas yesterday the mercury struggled to reach 90, today it sails through that threshold and tops out in the mid-90s. To make matters worse, the humidity is much more noticeable - making the air feel like 100. A soft wind from the southwest at 5-10 mph won't do much to take an edge off the heat. However, a couple spots may get some relief from an isolated late afternoon or early evening thunderstorm (20% chance) -- mainly to the north and northeast. Confidence: Medium-High
Tonight: It's a very muggy night all-around. Lows might dip below 70 in the coolest outlying suburbs, but most spots will range from 70-75 -- with the warmest readings downtown. Confidence: High
Keep reading for the forecast into early next week...
Tomorrow (Sunday): Stepping outside and it's like you're entering a sauna. High temperatures climb all the way up into the upper 90s and the humidity makes it feel like 100-105. Like yesterday, somebody could see an isolated late day or early evening thunderstorm (20-30% chance). Confidence: Medium-High
Tomorrow Night: It's a muggy evening on steroids. The humidity is high and lows range from the low 70s in the "cooler" suburbs to the upper 70s downtown. Confidence: Medium-High
Grimace and bear it - because it's the last scorching hot day for a while on Monday. The mercury takes one more ride up into the mid-to-upper 90s before a strong cold front moves in. As this cold front collides with hot, unstable air in place, there's a chance (40%) of some strong storms. After any storms end Monday evening, it becomes partly cloudy and cooler, with lows 65-70 (suburbs-city). Confidence: Medium
We begin a cooling trend on Tuesday and we may, finally, fall short of 90 even with partly to mostly sunny skies. Confidence: Medium
The National Weather Service in Sterling, Va. posted an interesting climate note yesterday evening:
DCA HAS NOW RECORDED 90 DEGREE OR HIGHER TEMPERATURES IN SEVEN CONSECUTIVE DAYS... THE NINETEENTH TIME SUCH A STREAK HAS BEGUN BEFORE JULY SINCE WASHINGTON AREA TEMPERATURE RECORDS BEGAN IN 1872. THE FORECAST FOR DCA ALSO CALLS FOR AT LEAST A TEN DAY 90 DEGREE OR HIGHER STREAK THROUGH MONDAY THE 28TH. A TEN-DAY OR LONGER STREAK STARTING BEFORE JULY HAS ONLY OCCURRED FIVE TIMES AT WASHINGTON. AN EIGHTEEN DAY STREAK ENDED 14 JULY 1872 AND A FOURTEEN DAY STREAK ENDED 26 JUNE 1994.
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