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Today: Sunny, low humidity. 81-84. | Tonight: Clear, pleasant. 56-64. | Tomorrow: Some increase in humidity, mostly sunny. 85-89. | Get Express Forecast by E-mail
Our pleasant push of Canadian high pressure continues today with nearly full sunshine, exceptionally low humidity, light breezes, and comfortable to slightly warm temperatures. However, humidity cannot hold back for long in August, and we anticipate a modest increase tomorrow with at least continued mostly sunny weather. Thursday and Friday see higher humidity along with hotter weather (maybe low 90s) and a chance of thunderstorms. Hurricane Irene still wants to threaten our area late Saturday and especially Sunday. Debate continues on the track and intensity of the system.
Today (Tuesday): An excellent day with lots of sunshine, cool breezes from the north, and highs mainly in the low 80s. Our super-low humidity means nearly no heat index, but if you are an early-autumn allergy sufferer (like me now apparently), you may notice the extra stuff (ragweed) floating around with a few extra sneezes. Confidence: High
Tonight: Cool and comfortable weather that offers your air conditioner a breather with the windows open. The suburbs should dip into the mid-to-upper 50s with low-to-mid 60s in the city. Confidence: High
Keep reading for the forecast through the weekend...
Tomorrow (Wednesday): Canadian high pressure starts its exit from our area, which allows our winds to turn. Instead of coming from a comfortable northerly direction, we switch to a humid-pumping flow from the south. Dew points creep up and a few more clouds may pop. Mostly sunny skies with mid-to-upper 80s for highs. Confidence: High
Tomorrow night: Mostly clear and more muggy with lows in the mid-to-upper 60s in the suburbs to the low 70s in the city. Light winds from the south. Confidence: Medium-High
Thursday features the approach of a cold front. Temperatures will continue to inch higher with upper 80s to low 90s. Partly cloudy skies with a 30% chance of afternoon to evening thunderstorms. More thunderstorms Thursday night through around midnight (40% chance) with lows in the upper 60s to low 70s. Confidence: Medium
Friday sees the cold front stall over our area and then sort of fall apart. That means we really don’t shake the humidity, and I worry that we could even trend hotter here. Upper 80s to low 90s are favored, but if we get a big more sun, some spots could get hotter. A 30% chance of afternoon to evening thunderstorms too. Friday night is muggy and warm with lows in the upper 60s to mid 70s. Confidence: Low-Medium
The weekend continues to be complicated by Irene. Tropical systems are notoriously wily, so this forecast is subject to change in the next few days. For now, though, clouds should be increasing on Saturday with a slight chance of afternoon showers or storms. Highs should be in the mid-to-upper 80s. Heavy rains and gusty winds arrive very late Saturday night and persist through Sunday. The winds could gust to tropical storm strength (40-70 mph) if the system gets close enough to our area. Highs Sunday should be in the upper 70s with lows Sunday morning in the upper 60s to low 70s. If the storm takes a more easterly route, the impacts will be lessened and temperatures warmer. Confidence: Low-Medium