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DRYC GRABOWSKI SEMINAR – Sept 18th Navigation – Plying the Waters WX – BASIC WEATHER FOR BOATERS IMPORTANCE OF WEATHER KNOWEDLGE: Safety - & Enjoyment – Efficient Passage Making and/or Racing – WHAT CAUSES WEATHER? Atmospheric Physics - Boyles Laws Sun’s Influence - The Furnace Seasons -- The Tilted Earth GLOBAL WEATHER: WX Global Zones – Atmosphere Movement Jet Stream – WX Guidance WINDS: Prevailing Winds - Jet Stream: 500 milibar Local wind patterns - cells PRESSURE SYSTEMS: HIGHS – Happy Air dry dance spinning clockwise (northern hemisphere) LOWS – Sad Air wet with tears spinning counterclockwise (northern hemisphere) Interface – Where the Action is! FRONTS: Cold Front – dry cool to cold Warm Front – moist warm Occluded Front – CLOUDS AND THEIR MEANING: Stratus - static Cumulus – dynamic Cirrus – advanced warning – Mare’s Tails to Fish Scales Cloud types & Altitudes - interpreting their message STORMS: Thunder Storms and Tornados - Cumulonimbus crescendo clouds & beyond Tropical Storms and Hurricanes – Oceans Influence – warm water as fuel SOURCES OF WEATHER INFORMATION: The Sky – Look out the Window! Check the Barometer NOAA – various outlets including WX VHF channels TV – Weather Channel and local news – Accuweather, newspapers LEARNING MORE: The Weather Book The Weather Wizard’s Cloud Book Eye Wonder: Weather Presented by David Appleton