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Weather Forecasts
Weather forecasts are predictions of atmosphere and climate that are usually shown on the news. They are often measured with barometric pressure. Weather forecasts are useful when it comes to planning events. It could make the difference of going outside or staying inside.
473 Questions
How does the difference in temperature between water and land affect weather systems?
The oceans have a moderating effect on the Earth's climate, helping prevent extremes of air temperature. This is because water takes much longer than air to heat up and cool down. Since about two thirds of the planet's surface is ocean, this has a profound effect on climate. Outside the equatorial regions, this vast body of water tends to store heat during the summer months, and slowly release it during the winter. This is why coastal regions tend to have milder climates than areas that are far inland.
Specific HeatSpecific heat is a measure of how much heat it takes to raise the temperature of a given quantity of a substance by a given amount. This value is more than four times higher for water than for dry air or land. Land heats up quickly, and this heat is easily transferred to the air.
Air over land, however, also cools down relatively quickly. In contrast, much more heat is required to bring about a similar rise in ocean temperature, and so the seas take much longer to heat up. Similarly, they take much longer to cool down. For this reason, in areas that experience seasons, the ocean tends to lag behind the land in terms of temperature.
By Hisham Baig Effects on Climate
This difference in specific heat affects temperature ranges on both seasonal and daily timescales. Days are cooler, and nights warmer, over the oceans than on land. This has an effect on coastal areas, keeping temperatures down during the day, and preventing them from dropping very low at night.
On a micro scale, the effects of ocean temperature can easily be seen at the beach. Usually, air at a beach is a few degrees cooler than the air just a few miles inland during the day. Likewise, during the night, the air at the coast may not cool down quite as much as at inland locations. This is why coastal areas like San Diego have one forecast for the beach, and another for inland areas. The effect can also be seen in wind direction: typically, during the day wind will blow from the sea toward the land, where heat causes the air to rise, and vice-versa at night.
On a longer timescale, in summer, ocean temperature does not reach its maximum until some time after the maximum day length. Similarly, the minimum ocean temperature occurs some time after the shortest day. This influences the climate over land, creating a similar time lag.
As oceans heat up, they release more water vapor into the air, increasing its humidity. This also affects climate, as humid air takes longer to heat up, and retains heat for longer than dry air. Again, this has a moderating influence. Without the oceans, temperatures would fluctuate far more dramatically, probably making conditions impossible for most life forms.
The extent to which the ocean influences climates inland depends on topography. Moist air from a warm ocean can help moderate the climate for a considerable distance, but if it is forced to rise by a mountain range, much of the moisture will condense, forming cloud and producing rain. On the other side of the range, the air will have lost most of its moisture, and the climate will tend to be more extreme.
Ocean CurrentsThe equatorial regions receive more heat from the Sun than the higher latitudes, and this difference in the degree of warming of the oceans leads to currents that circulate heat around the globe. These currents have a huge impact on the climates of some parts of the world. Perhaps the best-known ocean current is the Gulf Stream, which is sometimes known as the North Atlantic Drift. This brings warm water from the Gulf of Mexico northward to northwest Europe, where its effect can be seen by contrasting the winters experienced in this region with those in Eastern Europe. For example, Glasgow in Scotland typically experiences mild, wet winters, while Moscow - at roughly the same latitude - has freezing conditions.
While this may be the most commonly cited example, ocean currents exist all over the world. Some are cold water currents, carrying cooler water from the arctic areas down toward the tropics. These reduce evaporation and humidity, leading to drier conditions with greater temperature variations than is usual for coastal regions. ENSO (El Niño/Southern Oscillation) is a periodic warming of part of the Pacific Ocean off the west coast of South America that has a huge effect on climate all over the planet.
How do meteorologist observe the diff weather in order to forecast the weather?
The weather is controlled by the flows of air and temperature. These follow the laws of thermodynamics and if you know the starting point, pressures and temperatures, you know which way things are going to go.
This, however is very short term. As time goes further into the future, the smallest of changes can have large effects. This is where chaos theory comes in.
With better understanding of chaos theory, several days ahead can be predicted.
Thousand of calculations have to be made, which is where computers have made great advances, in predicting a few days ahead, using computer models of past conditions and results. The more starting point measurements, the better the prediction.
and also the meteorologists use instruments like the barometer, hydrometer, thermometer etc..
Can you forecast the weather of Mars?
Weather on Mars consists of dust storms, strong winds, and temperature fluctuations. Weather forecasting on Mars is challenging due to its variable conditions and limited data available. Robots like the Mars rovers and orbiters, however, can provide some real-time weather observations to help scientists better understand and predict weather patterns on the planet.
Why might weather forecasts be important to students?
Weather forecasts can help students prepare for outdoor activities or make decisions about what clothes to wear. Knowing the weather can also impact travel plans or whether outdoor events will need to be postponed or cancelled. Understanding the forecast can enhance safety and overall well-being for students.
How do weather forecast predict the force and track of typhoons?
Weather forecasters use a combination of satellite images, weather models, and historical data to predict the force and track of typhoons. They analyze the development of the storm, its current location, atmospheric conditions, and other factors to make their predictions. Advanced technology, such as computer models and satellite imagery, has improved the accuracy and timeliness of typhoon forecasts over the years.
How meteorologists use Doppler effect in weather forecasts?
Meteorologists use the Doppler effect in weather forecasts by analyzing how the frequency of radar waves is altered when they interact with precipitation particles. By measuring the change in frequency, meteorologists can determine the speed and direction of winds associated with storms, as well as the intensity and movement of precipitation. This information helps in predicting the development and movement of weather systems with greater accuracy.
What do meteorologists use to forecast the weather?
Weather instruments like:
- thermometer
- anemometer
- wind vane
- compass
- barometer
- rain gauge
- radar
- satillite
- maps
- grahps
What do weather forecasters do before making a forecast?
Weather forecasters gather data from various sources such as weather satellites, radar systems, weather stations, and computer models. They analyze this data to determine current weather conditions and trends and then use this information to predict future weather patterns, providing forecasts to the public.
What would be the most trusted weather forecast?
Most people think weather.com is the most trusted weather site online. Facts and studies show it is true. It has the most viewers ans the forecast is the same as the weather channel on TV. People have their own opinions though. Believe what you want. The people like weather.com. It gives to yahoo too so yahoo is a good source.
What problems are associated with long-term weather forecast?
There quite a few problems with long term forecasting. There are obviously different layers of the atmosphere and meteorologists have to analyze all the layers to figure out what is going on in the upper layers. Also, there are quite a few different models that they have to look at and each of those models forecast something different meaning the models barely ever agree on what will happen. For example one model might track a Low pressure system to move north across the northern parts of the US then another model might have it take a track north then dip south across the central plains then back north across the Ohio valley. So there are quite a few different problems they face when they are forecasting for the long term.
How do you say weather forecast in french?
You say "weather forecast" in French as "prévisions météorologiques".
What is sure to happen after a long dry spell?
After a long dry spell, it is likely that there will be an increased risk of wildfires due to the dry conditions. The vegetation will be more susceptible to ignition, and the lack of moisture can make it easier for fires to spread rapidly. Additionally, there may be water shortages, impacting agriculture, wildlife, and human activities.
What is a judgmental forecast?
Judgmental forecasters often blend several forecasters' judgments together to produce a forecast. This may be a complicated process, since various "Delphic" methodologies are used to integrate inputs from people experienced in forecasting.
Which prediction method is making a short term forecast for severe weather event?
One method for making short-term forecasts for severe weather events is using numerical weather prediction models. These models use mathematical equations to simulate the atmosphere's behavior, allowing meteorologists to predict specific weather events, such as thunderstorms, tornadoes, or heavy rainfall, with a short time frame of a few hours to a few days in advance. Data from weather satellites, radar, and weather stations are input into these models to generate forecasts.
The probability that it will rain today and tomorrow is the multiplication of the probabilities of it raining both days. That is 0.6 X 0.4 = 0.24 So there is a 24% chance that it would rain both days.
What does blue mean on a weather forecast?
Blue on a weather forecast typically indicates cooler temperatures or the possibility of precipitation, such as rain. It can also be used to represent areas with fog or mist.
Explain why long term forecasts aren't always accurate?
Long term forecasts can be inaccurate due to unpredictable factors such as changes in weather patterns, economic shifts, or technological advancements. These uncertainties make it challenging to accurately predict long-term outcomes. Additionally, errors in data collection, modeling assumptions, and unforeseen events can further contribute to inaccuracies in long-term forecasts.
cilmatology
Demand forecast is a prediction of the future demand for a product or service based on historical data, market trends, and other relevant factors. It helps organizations make informed decisions regarding production, inventory management, and resource allocation to meet customer needs effectively.
Why do builders need to know the weather forecast?
Builders need to know the weather forecast to plan their work effectively. Extreme weather conditions like rain, snow, or high winds can impact construction activities and cause delays. By being aware of the forecast, builders can schedule their tasks accordingly to ensure the safety of workers and the progress of the project.
What does cat 5 mean in a weather forecast?
In a weather forecast, "CAT 5" refers to Category 5 hurricanes, which are the most severe and intense hurricanes on the Saffir-Simpson scale. These storms are characterized by extremely high wind speeds exceeding 157 mph and catastrophic damage potential.
What is forecast and how is it accomplished?
A forecast is a prediction or estimation of future events based on past and present data. It is accomplished by analyzing historical trends, patterns, and relevant variables to make informed projections about the future. This can be done using statistical models, machine learning algorithms, expert judgment, and other forecasting techniques.
How weather forecast are communicate the people?
Weather forecasts are communicated to people through various mediums such as television, radio, websites, mobile apps, and social media platforms. Meteorologists use a combination of visual graphics, maps, symbols, and verbal explanations to convey information about temperature, precipitation, wind, and other weather conditions to the public. Additionally, emergency alerts and notifications are sent out in case of severe weather events to ensure people stay informed and take necessary precautions.
How do you make a weather forecast PowerPoint?
To create a weather forecast PowerPoint presentation, you can start by selecting a weather-appropriate template or background. Include relevant weather icons, images, and data like temperature, humidity, and precipitation. Use text boxes to provide explanations and summaries for each weather element. Lastly, consider adding animations or transitions to make the presentation engaging.
How do weather forecast help local authority?
Weather forecasts (especially long-range ones) help local authorities prepare for severe weather. For example, forecasting a severe winter months in advance, will give local authorities time to order in extra supplies of grit for icy roads.
