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Lehigh Valley Ozone/PM2.5 Forecast

Small map of Pennsylvania showing counties involved in the lv partnership.
Forecasted AQI for Ozone Air Quality Index Scale Forecasted AQI for PM2.5
January 29, 2015

 

Date: Thursday, January 29, 2015
Action Day?:  No
Temperature:  Low 30s
Discussion:
On Thursday, expect the skies to turn mostly cloudy as a storm system, originating from southcentral Canada, drives southward across the Great Lakes / Ohio Valley region toward western PA. As a result, light rain / snow will develop over the western portion of the Commonwealth during the day. Later in the day, the precipitation from this system will approach our area. Over our area, high temperatures will be in the low 30s. The combination of the seasonable temperatures, the increase in moisture (due to the approaching system, and light wind flow during the morning hours will help drive PM 2.5 levels into the low moderate range in some areas.

Extended:
Over the coming days, expect temperatures to fluctuate between near to below normal levels as a series of systems impact our area. Here is how things are shaping up... On Friday, expect colder and drier air to build in as an area of high pressure builds in over the Midwestern US. This high will gradually shift east during the weekend. As it does, expect temperatures to warm closer to normal levels. At the same time, a new disturbance, with origins over the southwestern US, will make its way into the Plains and then eastward into the Ohio Valley. Late Sunday and Monday, this system will begin to impact PA. Expect it to be cold enough to support snow as the system moves east across the northern Mid-Atlantic. An area of high pressure will be quick to fill the storm's void across oura rea on Tuesday as it dives in from the west and over the Mid-Atlantic. A new storm system making its way north and east from the Gulf of Mexico could impact our area during the middle of the week. Overall, due to the nature of the activity expected over the next week, expect PM 2.5 levels to primarily stay within the good range, with levels possibly approaching the moderate range late in the weekend as the new storm system approaches the region. --Nolan

 

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