Metar

#1. When a TREND is included at the end of a METAR, the trend is a forecast valid for:

#2. A METAR may be defined as being:

#3. In the METAR shown below, the cloud base has been omitted. At what height might you expect the cloud-base to be? 28005KT 9999 ?????? 12/11 Q1020 NOSIG