James Wilkinson Sword wrote:
On Thu, 20 Jul 2017 16:08:28 +0100, NY wrote:
"James Wilkinson Sword" wrote in message
news
What do you believe weather forecasters mean when they say "40%
chance of rain"?
1) It will rain for 40% of the day.
2) There's a 40% chance it will rain at some point.
I googled it and apparently it depends on the forecaster? 1) and
2) are completely different meanings.
Given that it includes the word "chance" (ie probability) I'd
interpret it as the second meaning: if (hypothetically) you replayed
the day many times (Groundhog Day!) then approx 40% of the
occurrences of the day would have some rain.
Which is of no use to me whatsoever. Pouring with rain all day is
nothing like spitting for half an hour. Yet they don't distinguish
between the two. There should be a measurement where 0% means no
rain at all, and 100% means rain all day.
Prick.