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Timeline for Why a "100% chance" of rain?

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Jan 12, 2023 at 20:47 comment added Hearth @RudolphTheRedKnowsRainDear It depends on the region. In my area (which has pretty predictable weather), forecasts out to six or seven days are pretty reliable. As I understand it, historical averages aren't used until you go beyond the ten-day forecast, though predictions near the end of the ten-day forecast might not be much more accurate than historical averages.
Jan 12, 2023 at 17:19 comment added RudolphTheRedKnowsRainDear @Hearth But longer forecasts, like the common 10 day ones, do simply 'predict' the average weather for that time period. What else could they do? So extending the forecast too far (more than about 3 days) is just pandering to people who don't know any better. They should cut the forecast off at a certain number of hours in the future and say, "We have no idea."
Jan 12, 2023 at 15:07 comment added Hearth This is not how weather prediction works. Historical data from previous years is nowhere near enough to tell what's likely to happen; weather is predicted using the movement of air in the surrounding area.
Jan 12, 2023 at 12:56 comment added RudolphTheRedKnowsRainDear The issue in the question is with putting "100%" and 'chance' right next to each other, it's not about the weather.
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S Jan 12, 2023 at 12:00 review First answers
Jan 12, 2023 at 12:08
S Jan 12, 2023 at 12:00 history answered Philipp W. CC BY-SA 4.0