Forecast: Terrific today; wet Wednesday
FORECAST IN DETAIL
Canadian high pressure can be such a gift when we are in the summer months. Yesterday's high of 78 at National Airport was four degrees cooler than normal, while Dulles was a full six degrees cooler than climatology. The cool air mass is with us again today and will not come at the expense of sunshine either. Things change quickly tomorrow though as low pressure arrives to bring showers, storms, and clouds.
Today (Tuesday): We are graced with mostly sunny skies with just some fair weather clouds at times. Highs reach the mid-to-upper 70s with very light breezes from the northwest. Confidence: High
Tonight: Clouds will be increasing overnight and there is a 20% chance of showers or a thunderstorm very late at night. Lows are expected to still be comfortably in the upper 50s to low 60s. Confidence: Medium
Keep reading for the forecast through the weekend...
Tomorrow (Wednesday) will be our dreariest day of the week with lots of clouds and frequent showers and storms (70% likelihood). Highs should again be in the mid-to-upper 70s, but most of the day will probably be cooler due to clouds and precipitation. Rainfall totals could range from .5" to 1" throughout the area by the time it ends Wednesday evening. This situation should be more widespread with the heavier totals compared to our previous weekend storms. Variable winds at 5-10 mph. Confidence: Medium
Tomorrow Night: Evening showers and storms are expected (60% likelihood) followed by mostly cloudy later at night. Lows drop to the low 60s. Confidence: Medium
Thursday and Friday I expect it to be partly to mostly sunny, a bit warmer (low-to-mid 80s), and without rain. Lows should be in the low-to-mid 60s. Overall Friday should be slightly warmer than Thursday and slightly more humid too. But temperatures will be just about normal. Confidence: Medium
Oh woe the weekend. After a number of stellar days this week, the weekend is not looking as nice overall. However, if you prefer summer heat, then this weekend should play well for you as highs should be at or above 90 degrees under partly sunny skies Saturday and partly to mostly cloudy skies on Sunday. A surge of moisture should add the uncomfortable high humidity component. Afternoon and evening thunderstorms are possible on Saturday and probable on Sunday as a cold front approaches by afternoon and evening. Lows should be in the 70s. Refreshing Canadian high pressure could visit us again early next week. Confidence: Low-Medium
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