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Quiz - Weather
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Which is the wrong Statement about Clouds?
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Cumulonimbus Clouds go through the three height levels and can create their own little weather systems.
Dark Nimbostratus clouds often bring rain
High cirrus clouds may predict the onset of bad weather in 12-24 hours.
An visible expanding jet stream in a clear blue sky may be another indicator that weather will turn for the worse.
Altocumulus clouds are low level clouds that are very friendly.
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Which statement would be false about Air Pressure?
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A. A high pressure is an air mass above 1013 millibars .
B. Warm air can blend with more moisture than cold air.
C. Low air pressure represents unstable air.
D. Hot air is more dense then cold air and thus weighs more
E. Cold air is stronger, weighs more and pushes low systems aloft.
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What is not a characteristic of a low pressure system?
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Winter low pressures will have an advancing front of Gale winds moving in a counter clockwise direction.
Low pressure usually brings in clear sunny skies in Coastal BC.
Low Pressure is often associated with dropping Barometric pressure.
It is often referred to as a trough.
Brings long periods of rain.
Its barometric pressure is below 1013 millibars.
Winds flow down to the centre of the low trough.
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What Statement is true about the Coriolis effect?
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Objects not connected to the ground will deflect as they travel long distances around the earth including large scale weather patterns.
Due to the earths rotation, we find that the earth rotates slower at the poles then at the equator; items in the northern Hemisphere deflect to the right.
The deflection of the Coriolis effect in the southern hemisphere will be in the opposite direction as the north and thus deflect things in motion to the left, including air masses.
Weather patterns in the northern Hemisphere are deflected to the right. As a hurricane is coming towards Texas High pressure flows in toward the centre of the low and gets deflected to the right by the Coriolis effect moving the entire hurricane Spinning to the right.
All of these Statements are True about the Coriolis affect.
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What is not an effect of a Sea Breeze?
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Land heats up during the Day and as the heat rises, cool sea breeze comes in to take its place.
Wind picks up by mid-day or as the sun is directly over-head.
These mid day winds are predictable on sunny days in summer.
Kayak Guides must be careful when booking mid day tours on clear sky days due to Sea Breezes.
A Sea Breeze moves from East to West in the Northern Hemisphere.
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What might you expect during a Land Breeze?
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Wind moves counter Clockwise towards the middle of the trough.
Wind is cool because this happens at night.
Winds are tricky because you just can’t see them.
During the evening as the land cools quicker then the sea, you get winds moving out to seaward.
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What is a Katabatic Wind?
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This is a wind that moves towards your cat.
This is a wind that drops cold air down inlets.
This is a clockwise movement of air down the mountain at night
During the day, slopes and valleys heat up causing air to rise and draw moist cool air in as the heat rises.
During the evening rising hot air cools and drops down slopes and mountains and even at the foot of glaciers.
Both B and E
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Why does Fetch influence wind speed?
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The longer wind travels over open water unobstructed the more likely it is to pick up speed and form white caps and swell.
Your dog causes a sea breeze as it runs to Fetch the ball.
Friction reduces wind speed.
The Coriolis effect makes wind fetch increase to the right.
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What is the Technical Marine Synopsis?
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This is when they tell you what winds are doing at each specific marine reporting station.
This is the part of the weather no one listens too because it is too complicated.
It gives you a picture of the position and intensity of weather features such as highs and lows and where they are forecasted to be heading.
This is the Extended Forecast that is valid for the next three days after your initial 2 day forecast at all the significant light houses.
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What statements are true about wave height forecasts?
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They are issued twice per day and cover todays and the following day.
It describes the expected significant wave height rather than the maximum wave height.
The statement is significant wave height, which is the average of the highest one third of all waves.
Wave heights are described in metres and measured from trough to crest.
It tells you that all wave heights are a combination of wind wave and swell heights.
Wave forecasts can be unreliable because they are telling you what happens in a two-day period and combine swell heights and wind wave heights together which is contradicting. Swell can be easier for a kayak group than wind wave.
All these statements are true about Wave Height forecasts.
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