Predicting weather involves observing sky conditions such as clear, sunny, partly cloudy, or overcast skies based on the percentage of cloud cover. It also involves measuring temperature to determine how hot or cold it is. Wind is also observed and can range from calm with no wind, light winds that can be felt on the face, strong winds that cause branches and umbrellas to move, to hurricane level winds that reduce visibility due to foam and spray.

1. Predicting Weather
based on Observing
Done by Mon Mon Phyo
Adapted from http://www.bom.gov.au/info/wwords/

2. Sky condition
Clear:
Free from cloud, fog, mist or dust haze.
Sunny:
Little chance of the sun being obscured by cloud.
Cloud expected to cover approximately 0 to 15% of the sky for the majority of the day. (Note: High level cirrus clouds are often thin
and wispy, allowing a considerable amount of sunlight to penetrate them, sufficient to produce shadows. In this case the day could be
termed 'sunny' even though the sky may consist of cirrus cloud.)
Mostly sunny
Predominantly more clear sky than cloud.
Cloud expected to cover approximately 15 to 30% of the sky for the majority of the day. For example, during the day the sun would be
obscured by cloud for short periods of time.
Partly cloudy
Predominantly more clear sky than cloud.
Cloud expected to cover approximately 30 to 65% of the sky for the majority of the day. For example, during the day the sun would be
regularly obscured by cloud for short periods of time.
Cloudy:
Predominantly more cloud than clear sky.
Cloud expected to cover approximately 65 to 100% of the sky for the majority of the day. For example, during the day the sun would
be obscured by cloud for substantial periods of time.
Overcast:
Sky completely covered with cloud.
Cloud expected to cover 100% of the sky for the majority of the day.

3. Temperature: how hot or cold is it?

4. Wind
Calm 0 0 Smoke rises
vertically
Sea like a mirror.
Light winds 19 km/h or less 10 knots or less Wind felt on face;
leaves rustle;
ordinary vanes
moved by wind.
Small wavelets,
ripples formed but
do not break: A
glassy appearance
maintained.
Strong winds 40 - 50 km/h 22-27 knots Large branches in
motion; whistling
heard in telephone
wires; umbrellas
used with difficulty.
Large waves begin
to form; the white
foam crests are
more extensive with
probably some
spray
Hurricane 118 km/h or more 64 knots or more The air is filled with foam and spray. Sea
completely white with driving spray;
visibility very seriously affected.