PRECIPITATION Precipitation is any form of cloud

H2O that has grown heavy enough to fall to Earth.

Water droplets grow by bumping into and combining with other water droplets. Over time they grow heavy enough to fall to Earth.

KINDS OF PRECIPITATION There are several forms of

precipitation: Drizzle Rain Snow Sleet: rain freezes as it falls Freezing rain: rain freezes as it hits a

cold surface Hail: balls or irregular clumps of ice.

HAIL! Hailstones begin as a frozen raindrop

(ice)

When the ice falls, it gets pushed back up into the air and another layer of ice forms.

Then it falls again, and another updraft pushes it up again.

The stronger the updrafts the larger the hailstones.

Station model: Wind speed/direction Temperature Dew Point Air pressure Cloud Cover

Forecasting Weather

STATION MODELS

STATION MODELS

WIND SPEED & DIRECTION Arrow points in direction

of wind Big line = 10 Little line = 5

CLOUD COVERAGE

Station model: Wind speed/direction Temperature Dew Point Air pressure Cloud Cover

Forecasting Weather