| A | B |
|---|
| barometric pressure | caused by the weight of the atmosphere |
| dew point | reached when air cools to the temperature at which it cannot hold more moisture, which then condenses and can form dew or frost or clouds |
| doppler radar | device that uses radio signals to detect the location direction, and speed of winds in a storm and whether precipitation is moving towards or away from the radar station |
| geostationary satellite | weather satellite that stays above a certain point on Earth |
| isobar | lines drawn on a weather map that connect areas having the same atmospheric pressure |
| relative hummidty | amount of moisture(water vapor) in the air compared with the amount of moisture the air could hold at that specific temperature |
| station model | shows weather around a reporting station, represented by international symbols on a weather map |
| drier | air is this in the winter |
| wind direction and speed | meteorologists study isobars to help them determine this |
| rises | as relative humidity increases the dewpoint does this |
| greater | the closer the isobars the pressure is this |
| anemometer | measures wind speed near the ground |
| satellites | these sense infrared radiation at night to determine cloud cover |
| blue skies and sunshine | barometric readings are high causing this |
| west to east | normal direction of United States weather systems |
| thermometer | measures air temperature |
| psychrometer | determines relative humidity |
| barometer | measures atmospheric pressure |
| wind vane | indicates wind direction |
| coventional radar | sends out microwaves |
| an area of low pressure | L |
| cloudy and gray, maybe precipitation | weather in low pressure areas |
| an area of high pressure | H |
