Using normalized climatological anomalies to rank extreme synoptic-scale events objectively.

Robert Hart and Richard Grumm

Updated 5 January 2004 to include events from 1948 through 2003.

[ Description | Top-20 All Time | Top-10 by variable | Top-10 by month | Case References | Recent Ranking Changes | Latest MRF Rarity Forecast ]

Events within the past year that have entered the rankings

There have been no updates to the rankings Since November 2002, approximately 14 months ago.

Last updated: 5 January 2004

Robert Hart, PSU (
Richard Grumm, SOO, NWS CTP (