I am trying to perform an analysis on weather and car collisions data of New York city. I have downloaded weather data from NOAA. But I am not able to understand the data provided in the precipitation column of the weather dataset. It has a numerical value followed by capital letter. Some of these letters are: A,B,C,G,I,H.
Example: 0.03G, 0.08A, 0.0H
Can anyone please help me understand what these letters mean here. I have provided a picture of this column. Also, the name of the column in the dataset is PRCP.