The Past Weather Conditions information dialog allows for the input of the Past Weather (code W1W2).
Past Weather

Definition: The past weather refers to atmospheric phenomena occurring since the previous main synoptic hour or about 6 hours ago.

Method of Measurement: These values are visually or audibly determined.

Dialog Operation: Select from the appropriate definition in the list box using the mouse or the up/down arrow keys in both the W1 and W2 list boxes. If multiple weather types, report the weather conditions with the highest code in W1 and the second highest code in W2