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Posted at 7:00 AM ET, 08/12/2009

Forecast: Heat Wave Dissolves, Humidity Sticks

By Jason Samenow

Daily chance of t'storms through the weekend

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Today: Partly sunny and humid. 50% chance of showers and t'storms. 84-88. | Tonight: Chance of evening storms, then partly cloudy. 67-72.| Tomorrow: Partly sunny and humid, 30% chance of p.m. t'storm. 85-89. | A Look Ahead


So you thought the heat wave was over? That's actually true, but conditions over the next six days won't feel noticeably different than they have the past several. Despite a drop in temperatures of 5-8 degrees or so, humidity levels will stay right up there. In other words, expect to sweat on the way to work and hope for t'storms to cool things off in the evening; there's a slight chance of them daily.

Radar: Latest regional radar loop shows movement of precipitation over past two hours. Powered by HAMweather. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today (Wednesday): The cold front responsible for ending our heat wave will stall out just to our south. Unfortunately, it won't push far enough away to allow drier air to work its way into the area. Rather, a weak wave will ripple along the front, helping to ignite scattered showers and thunderstorms (50% chance) -- with one batch possible in the morning followed by a break, then more scattered activity later in the afternoon. Highs will reach the mid-to-upper 80s, though it will feel like the low 90s factoring in the humidity. Confidence: Medium-High

Probability: 30%
Coverage: Widely scattered

Tonight: After a few scattered evening storms (30% chance), it will be partly cloudy and muggy, with lows in the upper 60s to low 70s (suburbs to city). Confidence: Medium-High

Keep reading for the forecast through the weekend....

Tomorrow (Thursday): The front will remain stalled to our south and as more waves move along it, it will continue to serve as a focusing mechanism for widely scattered afternoon t'storm activity (30% chance). For most of the day though, it will be partly sunny, warm, and humid, with highs in the mid-to-upper 80s. Confidence: Medium-High

Tomorrow Night: Scattered storms may persist through mid-evening, with most activity winding down by midnight. Skies will generally be partly cloudy with lows within a few degrees of 70. Confidence: Medium-High


The forecast is a broken record Friday through Sunday. Each day should be partly sunny with a 30% chance of t'storms from late afternoon into the evening. It will be quite humid for the duration with highs in the mid-to-upper 80s, possibly reaching into the low 90s by Sunday. Overnight lows will range from the upper 60s to the mid-70s (downtown). Confidence: Medium

By Jason Samenow  | August 12, 2009; 7:00 AM ET
Categories:  Forecasts  
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Next: Checking the Forecast for a Rare August Day


Current temp. in Burke: 82.2 with overcast skies.

That second tropical wave just off the coast of Africa should be something to watch. It could potentially affect the East Coast next week.

Posted by: Yellowboy | August 12, 2009 11:18 AM | Report abuse

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