NAM analysis valid for grid point 5.7 nm / 130 deg from 48.48,-121.94:

As of Fri 14 Oct 2016 11:15:02 AM PDT, the NAM forecast sounding for 11AM
Near Iron-Penthouse —closest grid point available to 48.48 -121.94 | Go Back |
This is the current analysis. For future forecasts go to NOAA soundings
TI is Thermal Index and LPT is the Theoretical temperature of a Lifted Parcel of air starting at the ground.
♦Reverse Rows

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The Top of the Boundary Layer is also the Mixing Layer and is the level at which the Thermal Index = 0See DrJack's discussion or Richard Kellerman's pages.