In what order are sky cover contractions entered in column 10 of MF1M-10C?

Sky cover contractions in column 10 of MF1M-10C are entered in ascending order of height. This means that when reporting cloud cover, the lowest cloud layer will be recorded first, followed by higher layers in order. This systematic approach ensures clarity and consistency in weather observations, allowing for better understanding and communication of atmospheric conditions.

When sky cover is documented in ascending order, it helps meteorologists and aviation personnel assess potential weather impacts effectively. For example, knowing the height of cloud layers from lowest to highest can influence flight operations, visibility assessments, and weather forecasting.

Choosing an ascending order provides a structured method for data entry and helps prevent confusion that might arise from random or variable ordering of cloud layers.