East Central PA Forecast Region

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Proudly serving the
Susquehanna Valley
to the Lehigh Valley

Accurate weather forecast for Allentown, Kutztown, Northampton, Nazareth, Hershey, Harrisburg, Lebanon, Emmaus, Pottsville, Macungie, Bethlehem, and Easton.

Daily Weather Forecast and Accompanied Discussion
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ECPA
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High pressure moving in from the Great Lakes region will establish itself over our area for Friday. Humidity values will once again be at very comfortable levels. High pressure will move off the New England coast and a return flow will develop, and that will send a warm front north through our area on Saturday. Behind this front temperatures will climb quickly for Sunday as well as a rapid increase in dewpoints, and ergo humidity. Sunday will max out with temperatures reaching the upper 80s, and in some places, approaching 90°F.

Another upper level trough will be building over the Midwest and Great Lakes early next week, but with a strong ridge in place over our area, it will be kept away this time. So unlike past warm-ups that were short lived, this one looks like it will stick around for a while. A cold front is not expected until Tuesday, but a pre-frontal/leeward trough may set up over our area on Sunday afternoon. With high dewpoints and a relatively unstable atmospheric environment in place, we are expecting widely scattered t-storms to form along this leeward trough in the afternoon/evening. We are not expecting organized severe activity, but as usually is the case in summer, the storms will be pulse-types and could be locally strong. The threat becomes more isolated on Labor Day Monday and again on Tuesday ahead of the cold front. Despite the front coming through later Tuesday, Wednesday and beyond doesn’t really drop much in temperatures, and looking beyond the 6-day, that looks like it will remain the case at least through the end of the work week.

Daily Climatology for Allentown, PA Average Temps: Record Temps: High: 80°F High: 97°F (1953) Low: 59°F Low: 43°F (1982)

Forecaster: Meteorologist Bobby Martrich 29 August/0325z

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