12. Weather and Boating Flashcards
Temperature Behind a cold front is
Lower than in front of it
Condition favoring fog formation is
Moisture laden air
Air pressure behind a cold front is
Higher than in front of it
Majority of weather systems in the US come from
Westerly direction
Best source of marine boating weather is
National weather service
Northern hemisphere winds flow around into a low in what direction
Counterclockwise
Warm air
Rises
Warm moist air compared to dry cool air is
Lighter
Back to surface wind-turn 45 degrees to your right - low pressure area is
To your left
High pressure air mass is characterized by
Cool dry air
Fastest moving fronts are usually
Cold fronts
A hurricane is a tropical storm with sustained winds
64 knots or greater
A tropical cyclone is
Low pressure area over warm tropical waters
Clouds from which rain is falling are called
Nimbus
Main problem in thunderstorms tornadoes etc
Wind
Which of the following provides the most serious threat to boaters
Wind
The height of wind created waves depends on
How long wind is blowing, extent of the fetch, strength of the wind
Fog occurs most often near a
Warm front
Fronts are named for the kind of air that is
Behind them
Thunderstorms form ahead of
Cold fronts
On a colored weather map warm fronts are
Red
Weather is caused by
Heat
Thunderstorms are produced by
Cumulonimbus clouds
Clouds in front of a warm front are
Stratus and cirrus
A particularly dangerous phenomenon that can occur several miles away from a thunderstorm and a squall line is a
microburst
