2Weather changes occur day to day and from season to season.
3In order to understand daily weather conditions, weather data must be collected accurately using weather instruments.
4The condition of how fast the air is moving Wind SpeedThe condition of how fast the air is moving
5Measured with an anemometer as the wind causes the cups to spin Wind SpeedMeasured with an anemometer as the wind causes the cups to spin
6AnemometerWind speed is measured with an anemometer as the wind causes cups to spin
7The more turns, the faster the wind speed AnemometerHow does it work? As the cups spin, the anemometer counts how many times they spin in a given period of time.The more turns, the faster the wind speed
8The condition determined by where the wind/moving air is coming from Wind DirectionThe condition determined by where the wind/moving air is coming from
9Wind vaneWind direction is determined with a wind vane (weather vane). Wind direction is described by the direction from which the wind is blowing.
19As the seasons of the year change, temperature changes may cause precipitation changes.
20Northerly winds may bring colder air than southerly or westerly winds Northerly winds may bring colder air than southerly or westerly winds. What does that mean? Winds blowing from the north may be colder than winds blowing from the south or west.
21Weather Conditions fair weather showers or light rain clear skies with cold temperaturesdays of cloudsdays of precipitationwindy fair dayswindy stormy weather
22Weather patterns involve weather conditions that are repeated due to the season of the year. Example: Summer temperatures are generally warmer than winter temperatures.
23Weather Signs looking at clouds noticing changes in wind speed and noticing changes in wind directions [These can indicate storms or temperature changes.]
24Weather Predictions Based on qualitative and quantitative data-- NOT JUST GUESSES!The predictions are based upon a combination of types of data.
25Meteorologists http://www.wistv.com/ Meteorologists interpret information from a variety of sources and use those sources to make predictions.
26The information they use is shown on a weather map. MeteorologistsThe information they use is shown on a weather map.
27Weather MapsMay show large masses of warm or cold air moving…Lines between the air masses are called fronts.
28Weather Maps Warm fronts Cold fronts May show large masses of warm or cold air moving…Lines between the air masses are called fronts.Warm frontsWhen a warm front passes over an area, the air temperature increases.Cold frontsWhen a cold front passes over an area, the air temperature decreases.
29Data related to temperature and precipitation can also be found on a weather map.