15 Day Extended Forecast (2024)

FAQs

How accurate is a forecast 2 weeks out? ›

The Short Answer: A seven-day forecast can accurately predict the weather about 80 percent of the time and a five-day forecast can accurately predict the weather approximately 90 percent of the time. However, a 10-day—or longer—forecast is only right about half the time.

AccuWeather gathers the best and most comprehensive weather data to deliver forecasts with Superior Accuracy. Forecasts are pinpointed for every location on Earth and extend further ahead than any other source.

An assessment from the Post determined that the 45-day forecasts were not even able to predict trends accurately, and that, although the forecasts did not decrease in accuracy with time, the forecasts were so far off even in the short range as to be useless.

We can forecast for the very near future (perhaps a few hours), or produce short (1-2 days), medium (3-7 days), or long-range forecasts (you may find varying definitions of these forecast ranges, but these will give you the basic idea).

Even now five-day weather forecasts are about 90% accurate, but 10-day forecasts are more like 50%. Anything beyond that becomes speculative. The Met Office and others do now issue long-term forecasts, but these give probabilities rather than making exact predictions.

Peer-reviewed research has concluded the practical limit to forecasting specifics is on the order of eight to 10 days. So how did AccuWeather's forecasts weeks and months into the future do? They were about half right.

In a composite measure of accuracy, the Weather Channel and Weather Underground came top, AccuWeather fifth, MeteoGroup (the BBC's new provider) sixth and the BBC ninth (based on Met Office forecasts).

According to ForecastWatch, the premier organization for evaluating the accuracy of weather forecasts, The Weather Company is more likely to be the most accurate and reliable weather forecaster across all geographic regions studied (U.S., Canada, Central America, South America, Europe, Africa, Middle East, and Asia- ...

July 29, 2021. IBM and its subsidiary The Weather Company continue to be the overall most accurate weather forecast providers worldwide, according to a new study. The Weather Company includes weather.com and other digital properties of The Weather Channel.

This comprehensive test analyzed over 25 million weather forecasts in more than 1,000 locations globally, and AccuWeather was the clear winner in high- and low-temperature forecasts, proving to have the lowest average absolute error and the greatest percentage of forecast accuracy within 3 degrees F.

Does AccuWeather use NoAA? ›

In turn, AccuWeather partners with NOAA and dozens of other government agencies across the globe to share life-saving weather alerts with the public across our free AccuWeather digital properties, which are used by billions of people worldwide.

Our state-of-the-art microscale model downscales high-performing global and regional model data to provide accurate forecasts localized to every 1 km globally. Forecasts are generated for every minute over the next two hours and for every hour over the next 90 days.

The chaotic nature of the atmosphere along with the incomplete understanding of atmospheric processes is what makes forecasting difficult.

Meteorology technology continues to improve, but for the foreseeable future, the weather forecast will be more accurate the closer you are to the day in question. The 24-hour forecast is more dependable than the three-day forecast, which is in turn more dependable than the 10-day forecast.

A 5-year forecast is an educated projection of your company's financial performance over the next five years. It specifically details projected revenues, costs, expenses, cash flows (including any projected capital raises), and owner equity, as well as projecting sales growth and margins.

While the goal is always 100%, this can easily be seen as far out of reach. It is thus widely suggested that any percentage north of 70% is a good forecast accuracy percentage. However, this benchmark does have certain factors affecting it, such as industry and demand.

ForecastWatch is the only globally recognized measure of forecast accuracy. Of all commercial weather providers, The Weather Company is the most open about what goes into our forecast, how we create it, and how that is measured.

If a forecast for a given county says that there is a 40% chance of rain this afternoon, then there is a 40% chance of rain at any point in the county from noon to 6 p.m. local time.

Mean Absolute Percentage Error (MAPE) is a common method for calculating sales forecast accuracy. It's calculated by taking the difference between your forecast and the actual value, and then dividing that difference by the actual value.