Extratropical Storms (1885-1996) Count by Month (USA)

This data set consists of the monthly counts of the number of storms passing through designated 2.5-degree lat and 5.0 degree long. grid cells. The data are from the published tracks of the centers of cyclones across North America published by NOAA in Monthly Weather Review and Mariners Weather Log. Storm centers were defined by closed isobars that persisted for 6 or more hours. The coordinates given for each counting cell define the northeast corner of the grid cell. Thus longitude 120 and LAT45 is the cell that extends from longitude -120 to -125 and latitude 42.5 to 45.