MODIS data are used to revise or confirm 24-hour forecasts related to weather systems approaching the land from the oceans, which in turn gives confidence for flood warnings. Satellite images are also useful in providing everyone with the same 'big picture' of severe storms.
Potentially useful data sets: MODIS Water Vapor (day and night), Cloud Top Temperature (day and night) and Cloud Top Pressure (day and night).
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Read the disclaimer for more information about using the data.