Thanks to Sue for the link to Mountain Weather Information Service - apparently both accurate and precise.

Here is the forecast for the Cumbrian Fells on Day 1

1. Headline Blustery, but fine with patchwork of sun. General haze.
2. How Windy? - South or southwesterly, 25mph. Will ease to 20 or perhaps 15mph through afternoon and evening.
3. Effect Of Wind? - Will impede steady walking on higher areas before easing
4. How Wet? - Rain unlikely
5. Cloud on the hills? Clearing the fells, cloud on higher fells mid-morning will very likely all clear.
6. Chance of cloud free Munros? 90%
7. Sunshine and air clarity? Periods of sun and good visibility.
8. How Cold? 750m: 10 to 12C.
9. Freezing level - Above summits