what does dew point mean in weather forecasts?

Question

thanks for your help

Answer 1

In really imprecise terms...dewpoint refers to the temperature to which one must cool a parcel of ambient air to achieve condensation.

In practice, condensation may form at temperatures somewhat above the dewpoint, depending on the type of condensation nuclei present.

It is a very useful way to represent the amount of water vapor in the air.

More useful than stating relative humidity in % - a measure that has little meaning unless you also know the temperature and have a working knowledge of how saturation vapor pressure changes with temperature.

Answer 2

Dew Point: The dew point temperature is the temperature to which the air must be cooled to reach saturation (assuming air pressure remains the same). The dew point is a direct measure of the amount of moisture present in the air, and directly affects how you feel... or in other words... measures the amount of humidity in the air. Remember, the temperature never drops below its dew point, but can drop to it. Generally, we start to feel some discomfort when the dew point gets to or just above 60 degrees. Once the dew point gets into the 60's and 70's, the air is extremely moist and we feel very sticky. The dew point very rarely reaches 80 degrees. The dew point can go well below zero in the winter, which is why wintertime air is usually so dry. The dew point is really relative to the season, when speaking whether its high or low. If the dew point was 60 in the summer, that would be normal , but would be considered extremely high in the winter.

Answer 3

Dew point is the temperature at which air would become saturated, if it were cooled sufficiently.If you lower the air temperature below the dew point, spontaneous condensation of water vapour will occur.Clouds form like this only.The maximum amount of water vapour air can contain, varies with temperature.If, at a particular temperature the air contains the maximum moisture, then the air temperature and the dew point temprerature will be the same and the air is said to be saurated.Here the humidity will be 100 percent.If the humidity is less than 100 percent ,Dew point temperature will be less than Air temperature.At 100 percent, both are same

Answer 4

The dew point is the temperature to which the air must be cooled before it
becomes saturated and water must condense out. The closer the temperature
and the dew point, the more humid the air. Most often we meet humidity as
"relative humidity" given as a percent - meaning the higher the percent, the
closer the temperature and dew point are.

Answer 5

I agree the most with figaro1912's answer to this question. I live in Tennessee, and especially during this time of year, being outside on many days (especially in the afternoon and early to mid evening) is almost unbearable. Dew points in the mid 60s and higher are very uncomfortable, while dew point temperatures lower than the mid 60s are quite pleasant.

Answer 6

It's the temperature at which moisture in the air condenses to water ie dew.

Answer 7

The temperature to which air must be cooled at a constant pressure to become saturated. Learn more about weather terms at http://www.weather.com/glossary/d.html

Answer 8

The difference between dry and wet bulb thermometer temps in a Stevenson screen

Answer 9

The temperarture to which a parcel of air must be cooled for condensation to occur

Answer 10

Try Google