Weather

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Weather

• An Overview for Walkers

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What is Weather?
weather  n. The state of the atmosphere at a
given time and place, with respect to variables
such as temperature, moisture, wind velocity, and
barometric pressure
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Where do we find out about it?

• Met Office (Website, Telephone- VERY good for
  mountain areas- now accessible via
  www.stmarysdofe.co.uk !)
• BBC Website (www.bbc.co.uk/weather - includes
  postcode search)
• TV, Radio, Newspapers
• Tourist Information Centres
• Mountain Rescue Centres
• Look!

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Air Masses
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Weather Fronts
Cold Front. Cold air replaces warm air. Where
warm air is pushed up and rises over cold air, it
is forced to cool and condense. This produces
rain.
Warm Front. Warm air replaces cold air- Good
weather!
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Precipitation
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Wind
All of This Wind
Squeezes Through this Gap!
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Note Cumulus clouds are fluffy Stratus clouds
are long Nimbus means rain
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Cloud Types
Alto Clouds

• In the middle of the sky
• Wavy and rounded
• Mark end of a cold front
• If you see them early in the morning on a warm
  day it often means that therell be a thunder
  storm later in the day

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Cloud Types
Stratus Clouds

• Thick layers of cloud (stratus is Latin for
  blanket)
• Low in the sky
• Reduce visibility
• Often bring drizzle but not heavy rain

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Cloud Types
Cumulo Nimbus Clouds

• Thick and fluffy
• Often grey / black
• Cause severe weather
• Mostly cause rain!

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Likely expedition weather

• Rain (constant)
• Showery and Overcast
• Sunny with Showers
• Sunny and Hot
• Windy
• If youre lucky Sun with occasional cloud cover
  and a light cooling breeze

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Weather when youre walking

• Clothing- Hot and Cold
• Health- Hot and Cold
• Morale
• Dropping out

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Weather and the expedition

• Extreme Weather
• Camping
• Bad Weather Route

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Questions?
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