A conceptual weather-type classification procedure for the Philadelphia, Pennsylvania, area

Water-Resources Investigations Report 89-4183


  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS | Dublin Core


A simple method of weather-type classification, based on a conceptual model of pressure systems that pass through the Philadelphia, Pennsylvania, area, has been developed. The only inputs required for the procedure are daily mean wind direction and cloud cover, which are used to index the relative position of pressure systems and fronts to Philadelphia.

Daily mean wind-direction and cloud-cover data recorded at Philadelphia, Pennsylvania, from January 1954 through August 1988 were used to categorize daily weather conditions. The conceptual weather types reflect changes in daily air and dew-point temperatures, and changes in monthly mean temperature and monthly and annual precipitation. The weather-type classification produced by using the conceptual model was similar to a classification produced by using a multivariate statistical classification procedure. Even though the conceptual weather types are derived from a small amount of data, they appear to account for the variability of daily weather patterns sufficiently to describe distinct weather conditions for use in environmental analyses of weather-sensitive processes.

Publication type Report
Publication Subtype USGS Numbered Series
Title A conceptual weather-type classification procedure for the Philadelphia, Pennsylvania, area
Series title Water-Resources Investigations Report
Series number 89-4183
DOI 10.3133/wri894183
Year Published 1990
Language English
Publisher U.S. Geological Survey
Description iv, 23 p.
Country United States
State Pennsylvania
City Philadelphia
Google Analytic Metrics Metrics page
Additional publication details