Thursday, May 23, 2019

Examining environment using All Sky Lap PW

Covering the CTP (State College) area today. Initial convection has moved through, but models are suggesting redevelopment later in the afternoon along a front.  The help see changes in the atmospheric moisture, I've captured an animation of a 4 panel AllSkyLAP PW.



For reference, the upper left is the total column PW, the upper right is 1-0.9 sigma, the lower left is 0.9-0.7 sigma, and the lower right is 0.7-0.3 sigma.  What stands out to me surging eastward of lower values of the upper-most layer (0.7-0.3) towards the CWA, while the lowest layer (1-0.9) is remaining mainly unchanged. This suggests that the drying above the 0.7 sigma level (approximately 600-700 mb for CTP) may lead to increased values of DCAPE later this afternoon, so that any storms that do manage to initiate could have a threat of severe winds.

Thorcaster

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