For the first time, German researchers have measured the influence of clouds on short-term fluctuations of solar radiation in North America. They have used a globally unique network of radiation sensors that was designed ...
Environment
Sep 7, 2023
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7
Developments in machine learning are continuing at breathtaking pace, both inside and outside of weather forecasting. To help assess machine learning weather forecasts from different sources, we now show a range of them in ...
Earth Sciences
Sep 6, 2023
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2
Coastal communities in eight locations along the East and West coasts experienced record high tide flooding last year—a trend that is expected to continue in 2024. For many communities, the expected strengthening of El ...
Environment
Aug 23, 2023
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12
Temperatures in Morocco have for the first time on record topped 50 degrees Celsius (120 Fahrenheit), the North African country's meteorological service said Sunday amid a scorching heat wave.
Environment
Aug 13, 2023
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206
For three weeks in July, the world's most elite bike racers climb steep mountains and sprint along historic cobblestones to capture the coveted yellow jersey or the race leader in the Tour de France. It's a 22-day feat of ...
Environment
Aug 9, 2023
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1
Firefighters from Spain and France succeeded on Saturday in containing a wildfire near the countries' shared Mediterranean coastal border, after winds dropped enough to allow water bomber planes to fly.
Environment
Aug 5, 2023
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1
NOAA's National Hurricane Center—a division of the National Weather Service—has a new model to help produce hurricane forecasts this season. The Hurricane Analysis and Forecast System (HAFS) was put into operations on ...
Earth Sciences
Jul 14, 2023
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1
Weather forecasts have gotten quite good over the years, but their temperatures aren't always spot on—and the result when they underplay extremes can be lethal. Even a 1-degree difference in a forecast's accuracy can be ...
Earth Sciences
Jul 14, 2023
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8
Temperatures are sizzling across Europe this July amid an intense and prolonged period of heat. And it's only just begun. Italy, Spain, France, Germany and Poland are all facing a major heatwave with temperatures expected ...
Environment
Jul 13, 2023
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14
Experiments at the unique wind tunnel of the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) in Göttingen show that laws formulated more than 80 years ago and their extensions only incompletely explain turbulent ...
General Physics
Jul 13, 2023
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52
Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location. Human beings have attempted to predict the weather informally for millennia, and formally since at least the nineteenth century. Weather forecasts are made by collecting quantitative data about the current state of the atmosphere and using scientific understanding of atmospheric processes to project how the atmosphere will evolve.
Once an all human endeavor based mainly upon changes in barometric pressure, current weather conditions, and sky condition, forecast models are now used to determine future conditions. Human input is still required to pick the best possible forecast model to base the forecast upon, which involves pattern recognition skills, teleconnections, knowledge of model performance, and knowledge of model biases. The chaotic nature of the atmosphere, the massive computational power required to solve the equations that describe the atmosphere, error involved in measuring the initial conditions, and an incomplete understanding of atmospheric processes mean that forecasts become less accurate as the difference in current time and the time for which the forecast is being made (the range of the forecast) increases. The use of ensembles and model consensus help narrow the error and pick the most likely outcome.
There are a variety of end uses to weather forecasts. Weather warnings are important forecasts because they are used to protect life and property. Forecasts based on temperature and precipitation are important to agriculture, and therefore to traders within commodity markets. Temperature forecasts are used by utility companies to estimate demand over coming days. On an everyday basis, people use weather forecasts to determine what to wear on a given day. Since outdoor activities are severely curtailed by heavy rain, snow and the wind chill, forecasts can be used to plan activities around these events, and to plan ahead and survive them.
This text uses material from Wikipedia, licensed under CC BY-SA
