PA Ozone/PM2.5 Forecast
September 23, 2014
Date: Tuesday, September 23, 2014
Temperature: Upper 60s
On Tuesday, expect the skies to turn mostly sunny as the area of high pressure, which was well off to our west on Monday, continues to shift east. Winds will remain out of the north, allowing cooler and drier conditions to reside over the region. However, with more sunshine, afternoon temperatures will reach into the upper 60s. Air quality levels will remain low though as the air mass remains dry and the source of the air mass remains from a cleaner source.
Over the coming days, expect temperatures to be on the increase as our weather continues to be driven by the location of the high pressure system, which is currently to our west. Here is how things are shaping up... The area of high pressure, which is currently off to our west, will move east of our area on Wednesday. This, along with a low pressure system hanging off the southeastern US coastline, will steer the flow the out of the southeast. The low pressure system will slowly make its way northward through the western Atlantic so that by Friday it will be sitting off the northern Mid-Atlantic coastline. Over the weekend, expect a new area of high pressure to build back in over the Northeastern US. This high will remain in place for a good portion of next week as well. In fact, the next measurable precipitation event is likely to not occur until the following weekend. Overall, with high pressure in control of our weather, expect there to be periods of stability and increasing PM 2.5 levels. Overall, generally moderate air quality should be the rule. --Nolan
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