[OC] How reliable is the weather forecast across the US? (to within 3°F)

The National Weather Service’s forecasts are, it turns out, admirably well calibrated46 (figure 4-7). When they say there is a 20 percent chance of rain, it really does rain 20 percent of the time. They have been making good use of feedback, and their forecasts are honest and accurate.

Floehr’s analysis uncovered two big trends in weather prediction. One was toward greater relative accuracy in the private sector—which of course was totally dependent on the National Weather Service data for its forecasts. The other was the astonishing improvement in all weather predictions. The five-day-out forecast in 2016 was as accurate as the

The bigger question is why, if these longer-term forecasts aren’t any good, outlets like the Weather Channel (which publishes ten-day forecasts) and AccuWeather (which ups the ante and goes for fifteen) continue to produce them. Dr. Rose took the position that doing so doesn’t really cause any harm; even a forecast based purely on climatology might