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An example of a two-day weather forecast in the visual style that an American newspaper might use. Temperatures are given in Fahrenheit. Temperatures are given in Fahrenheit. Most end users of forecasts are members of the general public.
Environment Canada reports a chance of precipitation (COP) that is defined as "The chance that measurable precipitation (0.2 mm of rain or 0.2 cm of snow) will fall on any random point of the forecast region during the forecast period." [7] The values are rounded to 10% increments, but are never rounded to 50%. [8]
Nowcasting in meteorology uses surface weather station data, wind profiler data, and any other weather data available to initialize the current weather situation and forecast by extrapolation for a period of 0 to 6 hours. In this time range it is possible to forecast small features such as individual storms with reasonable accuracy.
They are generally only issued on the day of the event. However, there have been two occurrences (April 7, 2006, and April 14, 2012) of a high risk being issued for Day 2 of the outlook period (with the event occurring the following day). Under the official protocol, a high risk cannot be issued for Day 3 of the outlook period. [2]
A wide swath of 1-2 inches of rain is expected to occur across Jamaica northward into Cuba. ... Eighty to 100 mph gusts are forecast with an AccuWeather Local StormMax™ of 110 mph expected close ...
The outlooks issued are for Day 1, Day 2, and Days 3–8. The Day 1 product is issued at 4:00 a.m. Central Time and is updated at 1700Z, and is valid from 1200Z to 1200Z the following day. The Day 2 outlook is issued at 1000Z and is updated at 2000Z for the forecast period of 1200Z to 1200Z the following day.
In Washington, D.C., temperatures are forecast to reach the high 50s on Monday and mid-60s on Tuesday. New York and Philadelphia temperatures will approach 60 degrees.
The weather types are limited to obstructions of visibility and precipitation. [ 5 ] Animations may depict a time series of station model conditions which is most often used to show recent changes in weather conditions and are useful in nowcasting and forecasting .