The Boneyard Precipitation Network - Precipitation Types, Illinois State Water Survey

The Boneyard Precipitation Network

Precipitation Types

The following symbols are used in the "Precipitation Type" section in the map legend to describe the type of precipitation that occurred. This section is included in the daily maps only.

IPIce pellets (sleet)
SGSnow grains
ICIce crystals
      Z      denotes freezing precipitation
ZRFreezing rain
ZLFreezing drizzle
      W      denotes showery precipitation
RWRain shower
SWSnow shower
      T      denotes thunder
Precipitation intensity is denoted by placing, a "+", "-", or nothing after the symbol
For example, S+ is heavy snow, RW- is a light rain shower, TRW is a moderate thunderstorm.

Illinois State Water Survey

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