A Surprise Thursday Storm
Every so often you get a day where you don't think it's going to rain and then the weather throws a curveball at you. While much of the region did not see any significant precipitation yesterday some parts of the area did get a surprise thunderstorm complex that blossomed and brought severe weather to parts of the Lehigh Valley and Northeastern Pennsylvania.
These storms were the byproduct of an old storm complex across New York State and its associated outflow boundary. The boundary moved across an area of greater instability and lift, which allowed the clouds to interact with a low level jet streak that was moving from northwest to southeast. This then allowed for explosive development of new showers and thunderstorms across Northeastern PA, which then moved through Allentown and other parts of the northern suburbs.
CoCoRahs observers noted a huge temperature drop that was associated with these storms. Some places saw their temperature drop 20-25 drgrees in a short amount of time, which was caused by the storms tapping into a pocket of cold air aloft above the atmospheric heat dome. Temperatures in some areas dropped from the 90's to around 70 in just 15 minutes, bringing short-lived relief to yesterday's heat.
These storms were the byproduct of an old storm complex across New York State and its associated outflow boundary. The boundary moved across an area of greater instability and lift, which allowed the clouds to interact with a low level jet streak that was moving from northwest to southeast. This then allowed for explosive development of new showers and thunderstorms across Northeastern PA, which then moved through Allentown and other parts of the northern suburbs.
CoCoRahs observers noted a huge temperature drop that was associated with these storms. Some places saw their temperature drop 20-25 drgrees in a short amount of time, which was caused by the storms tapping into a pocket of cold air aloft above the atmospheric heat dome. Temperatures in some areas dropped from the 90's to around 70 in just 15 minutes, bringing short-lived relief to yesterday's heat.
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