Skew T question

Keith Brandt

Supporter
Mar 23, 2013
23
10
1
Alvin, TX
skewT.JPG
Here's an excerpt from a sounding from Pivotal weather near my location south of Houston. Dewpoint is 73, dry bulb 81. Why is the parcel lifted from ~90 degrees rather than the environmental surface temperature? Is that the convective temperature?

Thanks,
Keith
 

Keith Brandt

Supporter
Mar 23, 2013
23
10
1
Alvin, TX
Found an answer thanks to Reddit. The parcel is based on the virtual temperature as described by Doswell and Rasmussen in 1994, "The effect of neglecting the virtual temperature correction on CAPE calculations". SHARPpy automatically uses the virtual temperature when it does its CAPE and CIN calculation.
 
  • Like
Reactions: Verne Carlson