Weather And Boating - United States Coast Guard

Weather And Boating - United States Coast Guard

Chapter 12 Weather And Boating Boating Skills And Seamanship Copyright 2014 - Coast Guard Auxiliary Association, Copyright 2014 Inc. 14th ed.- Coast Guard Auxiliary Association, Inc. 14th ed. 1 Chapter

12 Weather And Boating Boating Skills And Seamanship Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 2 Lesson Objectives Boating Skills And Seamanship

Weather information sources Basic storm patterns Storm forecasting and precautions Go/No Go decision making Personal weather check list Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 3 Weather Information Boating Skills And Seamanship NOAA/NWS

Surface Analysis Interactive Weather buoys US Winds Jet Stream AccuWeather Intellicast Weather Underground Local cams Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed.

4 Wind and Boating Boating Skills And Seamanship Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 5 Winds and Boats Boating Skills And Seamanship What are the factors affecting winds? High and low pressure systems Fronts the intersections of air masses Warm usually clouds & rain, but little wind Cold often mean dramatic wind shifts,

strong gusts, storms This is where most severe weather occurs Heat buildup of heat over the earth causes air to rise, water condenses as rain Land breeze/sea breeze caused by heat differential between land & sea Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 6 Winds and Waves Boating Skills And Seamanship What are factors that determine characteristics of waves?

Wind strength Fetch - distance over water that wind travels Deep water - larger, longer waves Shallow water - short, steep waves Current - wind against current means short, steep waves Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. Copyright Hal Roth, 2006, reprinted with permission 7

Understanding Weather Boating Skills And Seamanship Weather and heat Land and sea breezes Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. Reprinted with permission from Gary Jobsons Championship Sailing by Gary Jobson 8 Understanding Weather Boating Skills And Seamanship

Earths major wind patterns: What major wind pattern are we in? These patterns shift with the seasons and are only general in nature Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 9 Understanding Weather Boating Skills And Seamanship

Low pressure systems rotate counterclockwise (in N Hemisphere) High pressure systems rotate clockwise (in N Hemisphere) Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 10 Understanding Weather Boating Skills And Seamanship Low pressure systems often produce inclement weather

Dramatic wind shifts High winds/thundersotrms Waves High pressure systems are associated with fair weather Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 11 Understanding Weather Boating Skills And Seamanship Buys Ballots Law Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed.

12 Understanding Weather Boating Skills And Seamanship Front Symbols Warm front Cold front Stationary front warm front cold front stationary front

Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 13 Types of Clouds Boating Skills And Seamanship Three types of clouds: High Level Cirrus, Cirrocumulous, Cirrostratus Mid Level Altocumulus, Altostratus Low Level Stratus, Stratocumulus, Cumulus, Nimbostratus, Cumulonimbus Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 14

Understanding Weather Boating Skills And Seamanship Weather clues from clouds Cold fronts often begin with cirrus clouds, followed by lowering altostratus, then cumulus and cumulonimbus (thunderheads) Frontal passage brings wind shift SW to NW, (sometimes strong and sudden) Warm fronts are usually preceded by mid-level clouds, lowering to low level stratus, with rain Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 15 Understanding Weather

Boating Skills And Seamanship Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 16 Understanding Weather Boating Skills And Seamanship Approaching low

Approaching warm front Passing warm front Within warm sector Approaching cold front Passing cold front Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 17 Student Activity Boating Skills And Seamanship

1 2 3 Clouds associated with fronts Cirrus Stratus Cumulus Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 18 Restricted Visibility Boating Skills And Seamanship

Foga cloud on the earths surface Advection fog - Warm moist air over cold water Radiation fog moist air over cooling land-may extend out to sea Frost smoke - very cold air over warm water Smog A combination of atmospheric pollution and condensed moisture Haze Combination of dust particles, atmospheric moisture, smoke Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 19 Fog Precautions Boating Skills And Seamanship

Precautions must be taken in fog Slow down! Keep careful lookout Listen to radio Use radar Use chart Navigate! Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed.

20 Should have slowed down Boating Skills And Seamanship Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. Adapted from Boaters Bowditch by Rickard K. Hubbard 21 Non-Frontal Weather Boating Skills And Seamanship Thunderstorms Can be dangerous

High winds, rapid shifts Waves can develop rapidly May presage cold front May pass quickly and harmlessly May form waterspouts Reprinted with permission from Boaters Bowditch by Richard K. Hubbard Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed.

22 Thunderstorms Boating Skills And Seamanship Waterspout Microbursts Tornadoes Lightening Tornado over the water Usually short-lived Dangerous if youre too close Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 23

Non-Frontal Weather Boating Skills And Seamanship If you are caught in a thunderstorm Have each person don a life jacket Pin point your location Keep a sharp lookout

Reduce speed Head into the wind and 45 to waves Secure hatches and ports Stow all gear Stay low in the boat Keep away from metal objects Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 24 Non-Frontal Weather Boating Skills And Seamanship Tropical Storms Tropical wave or depression

Tropical Cyclone Hurricane Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 25 The Go/No-Go Decision Boating Skills And Seamanship Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 26 Thank you Boating Skills And Seamanship

Illustrations provided by McGraw Hill Education The Copyright 2014 - Coast Guard Auxiliary Association, Inc. 14th ed. 27

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