Quote:
Originally Posted by fatgaz182
The Anchor Ground and most of Darwen is in a valley and is quite low down.
If you set off now you'll make the Kick Off  |
Whilst the DALR is 1º for every 500ft in altitude, thus meaning its colder higher up, this does not count overnight under a stagnant pool of cold air.
Although valleys are generally warmer due to lower elevation, hence rain in the valley bottom and snow on the tops in a marginal situation, under still cold air, valley bottoms are 99% of the time colder than higher up, overnight. Valley bottoms record colder minimums. Why? Because of katabatic cooling.
Cold air sinks to valley bottoms.
Darwen in a valley bottom will have been colder than much of the surrounding area last night.