What is the summation amount for 'Overcast' sky cover?

'Overcast' sky cover refers to a condition where the entire sky is covered with clouds. In meteorological terms, it is indicated by a total coverage measurement, which is represented as 8/8. This means the sky is completely obscured by clouds, with no clear sky visible.

The other options reflect different levels of cloud coverage. For example, 4/8 would indicate a broken coverage situation, where half of the sky is cloud-covered, while 2/8 also shows some cloud presence but does not signify full obscuration. The range of 5/8 to 7/8 suggests a mostly cloudy sky but still allows for some breaks in the clouds. Therefore, these alternative answers do not meet the criteria that define 'overcast' conditions, making the choice of 8/8 the correct representation for this weather condition.