Station data    Return to main page

Data are observations from stations throughout North America.

For each station all available data from the months November, December, January, February, and March (NDJFM) of the years 1948-1997 are used for analysis.

Data sets used in this work:

Extreme weather    Return to main page

In this analysis dealing only with temperature and precipitation, "extreme weather" refers only to days that are unusually cold or warm or that have a significant amount of precipitation. This term may invoke ideas of tornadoes, hail, wind storms, etc., but though those things may definitely be considered extreme, they are not part of this work.

Teleconnections    Return to main page


What this work aims to show    Return to main page


About the regions    Return to main page

The Canada and HCND data sets are national in scope and probably not likely to be protested. For storage and processing purposes the very large COOP data set was broken down into separate regions, but the region definitions and in which region some states were placed might be questioned. The regions were determined arbitrarily aiming to produce results with at least some geographic coherence and of approximately equal size (except for the small COOP Alaska, which was originally included in COOP Northwest).


Minor web browser requirements    Return to main page

Because there are so many total web pages involved with this work, they were designed in general to be not highly sophisticated. However, to get the full use of this archive a web browser should be capable of the following two things: