Following is a tabular summary of all the tropical depressions, tropical storms, hurricanes, and typhoons which occurred in the Northern Hemisphere between 1 January and 31 December 1998, as reported in the Monthly Global Tropical Cyclone Summaries prepared by the author. If neither of these agencies issued any warnings, no number will be given. Dates - range of dates for which tracking information for the cyclone is available in the Global Tropical Cyclone Tracks documents prepared by the author. For Northwestern Pacific systems the central pressure estimates are taken from advisories issued by the Japanese Meteorological Agency.
Central pressure is given in millibars, which is numerically equivalent to hectopascals.
This does not always agree with JTWC's assessment. An estimate of the maximum 10-minute average sustained wind. These values are taken from either Japan's or Manila's warnings, whichever had the higher value. A separate table is given for each of the four Northern Hemisphere basins. There were some lower pressures for Danielle and Lisa given in advisories, but these were likely after the storm was more or less extratropical.