Kate Hall – Wasatch Elementary

 From the Earth to the edge of space, which is about 70 miles, air molecules are stacked on top of each other.  Due to this stacking of molecules the Earth’s air has pressure.  This pressure is greatest closest to the Earth’s surface and the pressure lessens as the air goes vertical toward space.  This pressure can change, it is that pressure change that brings us our weather.  The changing pressure can affect wind, clouds, precipitation, and it makes the water cycle continue to go on and on.

 The instrument we use to judge Barometric pressure is called a Barometer.  There are numbers on a Barometer that range from 28 to 31.  A barometer is used for predicting weather in one to two days, not today.  It is a device used to help predict the weather.

Generally, if the barometer reads 30 our area will have nice weather for two days. The higher the Barometer is over 30 the nicer the weather will be. If the Barometer drops below 30 there is going to be a change in the weather. The lower the Barometer gets, the worse the weather gets.

 The lowest pressure ever recorded was inches of mercury in the storm Typhoon Tip. It was recorded 300 miles west of the island of Guam in the Pacific Ocean.  The highest pressure was observed at Agata Lake in Siberia on December 31, The barometric Pressure measured The temperature was -46 degrees C.

 How do weather forecasters know what the weather is going to be?  The Capital L’s on the weather map mean that area has a low pressure over it and is going to have stormy weather for the next couple of days.  The Capital H’s mean there is a high pressure over that area and that area will have good weather for the next couple of days.  Do you see any other symbols around the H’s and L’s?

 Charlotte, NC Conditions as of 9:52 AM Clear Temperature: 50° Wind chill: 47° Wind: NNW 8 mph Humidity: 46% Dew point: 30° Pressure: in. Visibility: 10.0 miles Observed at: Charlotte, NC

 Clearfield, UT- Conditions as of 8:25 am Mountain Time. Wind: From S at 18 mph Humidity: 54% Temperature: 29 Degrees Pressure: in. Dew Point: 17 degrees F Visibility: 3 miles

 A cloud is millions of water droplets condensed on dust particles.  There are three different types of clouds  Cirrus Cumulus Stratus

 Hurricanes are formed over warm waters in the ocean. Hurricanes do move in a circular motion and cover a LARGE area.

 A tornado is a whirlpool of windy air over land. Winds can be 300 miles per hour. The path of a tornado can cover several miles but the width of a tornado is much smaller than a hurricane usually covering an area smaller thank 100 yards.

 A thunderstorm is a storm with rain, high winds, dark clouds, lightning and thunder.

 Rainstorms have dark clouds, rain showers and breezes.

 Rain, Sleet Hail and Snow are all called precipitation, they are forms of water that fall from the sky.

 FreezingBoiling Water Boils at 212 Degrees F.