What can you infer from the temperature / dew point values in this METAR?
EGJG 121630Z 09012KT 9999 SCT006 15/14 Q1015
I understand the temperature is 15 degrees and the dew point is 14, and I found this:
The temperature / dew point spread is low, so the risk of cloud forming is high especially if the temperature falls.
Why is the risk of clouds forming high, especially if the temperature is falling?