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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
November 28, 2014

 

Date: Friday, November 28, 2014
Action Day?:  No
Temperature: Mid 30s
Discussion:
On Friday, expect mostly sunny skies to prevail for much of the day as the area of high pressure, which was over the Plains on Thursday, drops south and east and over the Ohio Valley / Mid-Atlantic region. This presence of this high nearby will continue to promote light wind flow while swinging our winds more out of the west (as compared to Thursday). As a result, we will see temperatures remain low as the core of the cold air drops in over western PA. Highs will be in the mid 30s. The combination of the snow cover along with the high pressure system moving overhead will promote limited mixing near the surface. It is the limit in mixing along with the holiday traffic associated with Black Friday that will help to keep PM 2.5 levels within the low moderate range.

Extended Forecast

Date

11/28/2014

11/29/2014

11/30/2014

12/1/2014

Ozone

WHITE

WHITE

WHITE

WHITE

PM

YELLOW

YELLOW

YELLOW

GREEN


Extended:
Over the next week, expect temperatures to be more reminiscent of a see-saw. Early in the work week, temperatures will drop thanks to a cold front moving through our area. An area of high pressure will be quick to build in over the Great Lakes and drive cooler (near seasonable) temperatures across PA. As quick as the high built in, it will be even quicker to move out as the next storm system moves in for mid-week. Once the front associated with that system moves through, a new high pressure system will build in and force cool, dry conditions into the region. This high will move east fairly quickly and allow for warmer air to build in from week's end. All in all, temperatures should hover about 5 to 10 degrees on either side of normal for the duration of the week. The progressiveness of the pattern will keep air quality levels within the good range for the period. --Nolan

 

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