In the METAR excerpt "SLP993 SNINCR 1/10," what does it mean?

The correct interpretation of "SLP993 SNINCR 1/10" in a METAR report is that it signifies "0.1 inch of snow recorded during the last hour." The portion "SNINCR" indicates that there has been an increase in snow, while "1/10" specifies the amount of this increase in inches.

In this context, "1/10" translates to 0.1, which captures the essence of snow accumulation over the last hour, making it clear that only a small increment of snow has fallen. This information is crucial for understanding current weather conditions, particularly for aircraft operations, as it helps dispatchers gauge the impact of recent snowfall on safety and operational decisions.

This information helps clarify variations in snowfall reports but does not confirm any larger accumulations like 10 inches or more, which would be indicated differently in METAR coding.