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Posted at 5:00 AM ET, 08/ 4/2008

Forecast: Heat to Build but not Boil

By Jason Samenow

Over the next several days, temperatures and humidity levels will increase, but they won't get high enough or last long enough to truly give us a heat wave. We're talking about a 48 hour stretch of sweltering stickiness Tuesday and Wednesday, then a return to pretty typical early August warmth late week.


Mostly sunny and very warm. 89-93 A breeze from the northwest will hold off the humidity for another day. But high pressure and its attendant full sunshine will lift temperatures to 90 or so.

Overnight, skies will be mostly clear with lows in the low 70s downtown and the mid-to-upper 60s in the suburbs.

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Hot, moderately humid. 92-96. A hot wind from the west will send temperatures soaring towards the mid 90s. Humidity won't be horrible, but will make it feel a few degrees hotter than it actually is.

Overnight, there's a decent (40%) chance of showers and thunderstorms as a disturbance ripples through the region. Lows should range from 71-76 (suburbs to city).


After some lingering showers in the morning, Wednesday looks hot and humid, with highs in the mid 90s. Heat index values could exceed 100 with dew points approaching 70. A second round of showers and thunderstorms may develop (40%) late in the afternoon or during the evening as a cold front punches through the region. Confidence: Medium

Temperatures drop 5 to 10 degrees Thursday behind the cold front and the humidity will also decrease. High temperatures should reach the upper 80s under mostly sunny skies. Confidence: Medium

Another cold front will likely move through the area on Friday possibly firing off some afternoon/evening thunderstorms. Before the front comes through, it should be partly sunny, warm and humid, with highs in the upper 80s.Confidence: Medium

While a ways off, the weekend has the potential to be delightful. High pressure building in from the northwest may deliver a refreshing northwesterly breeze and nice dry air. I'll call for highs in the low-to-mid 80s. Confidence: Low-Medium

By Jason Samenow  | August 4, 2008; 5:00 AM ET
Categories:  Forecasts  
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