GEOG 001 Lecture Notes - Lecture 14: Numerical Weather Prediction, Occluded Front, Wind Shear
30 Sep 2020
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Document Summary
Migrating low pressure center with converging and ascending air. Cyclogenesis: process where low pressure wave develops and strengthens. Mlcs develop along polar front, eastern slope of the rockies and other n-s mountain barriers, the gulf coast, and east coasts of na and asia. Open stage: warm air moves north along front, cold air moves south. Occluded stage: cold front overtakes warm front, wedging beneath it occluded front. Dissolving stage: lifting mechanism is cut off from warm air mass (source of energy and moisture) Further north in summer, south in winter. Where cp and mt meet in spring we have potential for many tornadoes. Synoptic analysis: evaluation of weather data at specific time. Numerical weather prediction: using database of wind, pressure, temp, and moisture conditions to forecast. More than billion per year through the 1990s. Katrina and remaining hurricane season (2005) > billion. When water vapor condenses, large amounts of energy are released.
