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Forecast Discussion: The Extended Weekend Forecast: On Saturday, expect mostly cloudy skies to persist over the region as a frontal system slowly drifts off to our east. The proximity of this front to our region will help to trigger some shower development over our area. With the front off to our east, expect the winds to turn more out of the west. The strong westerly flow over the region will help to drive in cooler and drier air over our area. As a result, expect afternoon highs to only rise into the mid 50s. The cool and dry conditions over the region will help PM 2.5 levels to fall into the good range. *** For Sunday, overcast skies will persist over the region as a second wave moves from west to east along the slow moving frontal system (which passed through our area on Saturday). As this wave slides by our area, expect another round of showers to fire off across our region. Continual winds out of the northwest will help to keep PM 2.5 levels confined to the good range while reinforcing the cooler and drier conditions over the region. *** On Columbus Day, mostly cloudy skies will continue to prevail over the region as the frontal system, which lingered near our on Sunday, officially moves off to our east. Cooler and drier air will continue to usher in from the north and west. So as afternoon temperatures struggle to make their way into the upper 50s, PM 2.5 levels will continue to hang within the good threshold. *** For Tuesday, partly sunny skies will build in over the region as an area of high pressure begins to build in over the eastern US. This high will help our winds die down during the day as it pushes fairly quickly off the Northeastern US coastline. The winds over our area will turn more out of the southwest, which, in turn, will allow warmer air to build into the region. Afternoon highs are projected to reach into the low to mid 60s. Air quality levels are expected to rise too in response to the warmer air building in. The controlling factor will continue to be the dry conditions. With dewpoints sitting in the 30s, expect PM 2.5 levels to remain within the good category. *** Extended Outlook: As we take a peek into next week, we notice that an unseasonably cool air mass will settle into the region after a cold front pushes through on Saturday. The overall pattern will remain progressive during the week with a series of frontal systems and areas of high pressure pushing through the weekend. Early in the week, high pressure will be in control of our weather. By Tuesday, this high pressure system will move off to our east. This will set the stage for a frontal passage on Wednesday into Thursday. This frontal passage could touch off a shower or two before a new area of high pressure build in over the Midwestern US and drives a cooler and drier air mass back into our area. Expect this high pressure system to be short-lived as a new, more potent frontal system moves in at the end of the week. Overall, the constantly changing pattern this week will force PM 2.5 levels to remain within the good threshold. --Nolan |
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