Count the number of seconds (one Mississippi...two Mississippi...three Mississippi...) between the flash of lightning and the thunder. Then divide by three. You now have the approximate distance in kilometres. (Sound travels approximately a third of a kilometre per second.)

4 forecasts you can trust:
1. Red sky at night, sailors delight.  Red sky in the morning, sailors take warning.

2. Campfire smoke descends, our nice weather ends.

3. When leaves show their undersides, be very sure that rain betides.

4. If birds fly low, expect rain and a blow.
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