12/25/2022 0 Comments Kobe copter![]() The marine layer is generally much more of a weather factor in the summer. It is, however, usually shallow, sometimes only 1,500 feet thick with clear skies above. For aviation interests, this cloud deck is often very dense with few if any breaks. With the excessive moisture, the marine layer is normally associated with a low, stratus cloud deck which frequently occurs at the top of the layer, just below the inversion. The marine layer itself is very shallow, typically only a few thousand feet in depth. This sets up an inversion layer separating the two very different air types. Above the marine layer, we have warm, dry, sinking air, the result of subsidence on the east side of the Hawaiian or Pacific High pressure area. Air sitting over this water becomes cool and moisture-laden. 26, this area of Southern California was covered by what is known as the “marine layer.” Off the coast of California, we have cool water temperatures (in the range of 50 F / 10 C) due to the cold California Current. Here is a closer look at the weather on that day. ![]() Over the course of a relatively short flight, the aircraft, which took off in marginal visual meteorological conditions (VMC), encountered IMC although the weather conditions themselves were well forecast and did not significantly change over the time of the flight. Obviously, the weather conditions in coastal Southern California were of paramount importance in this accident. The crash occurred in the Santa Monica Mountains, where rising terrain met the low cloud layer. A map of ceiling and visibility reporting weather stations along and nearby the accident aircraft’s route of flight on Jan. ![]()
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