News tagged with weather forecasts
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 and is available under the GNU Free Documentation License.
(HealthDay)—The monstrous tornado that devastated Moore, Okla., on Monday, killing dozens of adults and children, is a stunning example of violent weather that can affect a child's mental well-being.
Psychology & Psychiatry 9 hours ago | not rated yet | 0
Two types of environmental conditions—cold-dry and humid-rainy—are associated with seasonal influenza epidemics, according to an epidemiological study led by researchers at the National Institutes of Health's Fogarty ...
Diseases, Conditions, Syndromes Mar 07, 2013 | not rated yet | 0
New computer model takes a page from weather forecasting to predict regional peaks in influenza outbreaks
Scientists have developed a system to predict the timing and severity of seasonal influenza outbreaks that could one day help health officials and the general public better prepare for them. The system adapts ...
Diseases, Conditions, Syndromes Nov 26, 2012 | not rated yet | 0 |
(Medical Xpress)—It's no accident that Dr. Aram Attarian is an expert on camping and outdoor adventure safety. Attarian, a professor of parks, recreation and tourism management at NC State University, has ...
Health Oct 22, 2012 | not rated yet | 0
We've all been warned not to "judge a book by its cover," but inevitably we do it anyway. It's difficult to resist the temptation of assuming that a person's outward appearance reflects something meaningful about his or her ...
Psychology & Psychiatry Oct 15, 2012 | 4.3 / 5 (4) | 4 |
(AP) -- Allergy season has come early and hit with a wheezing vengeance in parts of the South and Midwest this year, thanks largely to an unusually warm winter. Abundant pollen is causing watery eyes, sniffles ...
Inflammatory disorders Mar 21, 2012 | 5 / 5 (1) | 0
Ever wondered how meteorologists can accurately predict the weather? They use complex spatiotemporal weather models, i.e. mathematical equations that track the motions of the atmosphere through time and space, and combine ...
Cancer Dec 21, 2011 | not rated yet | 0
Blazing temperatures can bring on serious illness if you're not careful. Dr. Abhi Mehrotra, an emergency physician at UNC Hospitals, offers tips on protecting yourself and your family against extreme heat.
Health Jun 09, 2011 | 1 / 5 (1) | 0