Table 4.9 https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_table4-9.shtml Probability of event below lower limit Probability of event above upper limit Probability of event between upper and lower limits (the range includes lower limit but no the upper limit) Probability of event above lower limit Probability of event below upper limit Probability of event equal to lower limit Probability of event in above normal category (see Notes 1 and 2) Probability of event in near normal category (see Notes 1 and 2) Probability of event in below normal category (see Notes 1 and 2) Missing