Thunderstorms to the West

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By Quincy Vagell on April 24, 2013, 3:45pm Last modified: April 24, 2013, 8:10pm

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5 p.m. update:

A Severe Thunderstorm Watch is in effect through midnight for much of Pennsylvania. 
Click here for more information. 

A cold front is moving into a somewhat unstable air-mass across the central Appalachians. Thunderstorms developing along the front could become strong to severe with locally damaging wind gusts. Any thunderstorm activity should diminish east of the mountains, with only a few rain showers or sprinkles moving into Connecticut later tonight.

In a severe weather outlook yesterday, I outlined this area as having a low risk of severe thunderstorms, with damaging winds being the primary threat. Temperatures have risen into the upper 60's to mid-70's in central and eastern Pennsylvania, which has steepened lapse rates. Moderate wind shear and storm relative helicity associated with the front cause cause some thunderstorms to reach severe limits.

The Storm Prediction Center (SPC) has said there's a 40% probability of a Severe Thunderstorm Watch being issued. The setup here is similar to last Friday, with the timing of a cold front moving across Pennsylvania during the afternoon and early evening hours.
The key difference here is that the cold front is not nearly as strong, so widespread severe thunderstorm activity is not expected.

Read more from the SPC here.

Follow my new Twitter account @stormchaserQ to track future progress as I venture out to chase and intercept severe weather later this season.

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Quincy Vagell

Town: Marlborough, CT  

Reporting for WXedge since January 2012.

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