As of Sun 07 Feb 2016 12:15:01 AM PST, the NAM forecast sounding for 12AM
Near Fraser_Valley —closest grid point available to 49.247 -121.89 | Go Back |
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.