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The preparation of a short-term forecast (generally for less than six hours). Such forecasts are often coupled with the description of current weather (or that prevailing a short time ago), based on observational data that are available in real time rather than at fixed, synoptic times. Radar images of rainfall and sferics fixes of lightning discharges are two examples, which show mesoscale systems that are not well defined by synoptic data. The term is also applied to forecasting conditions in the next 30 minutes for a specific site, such as the occurrence of microbursts at an airport.

Subjects: Meteorology and Climatology.

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