FACTS - FACility for Weather and Climate AssessmenTS

Near Real-Time Tools for Weather and Climate Event Assessment

Sample Output

Difference in the precipitation from 1979-1995 to 1996-2014 time periods as depicted in the ESRL-GFSv2 model showing drying over East Africa.
Correlation between monthly precipitation and Nino 3.4 index.
Plot of the 200 hPa height anomalies during strong El Nino years

See article on FACTS in the Bulletin of the American Meteorological Society:

Murray, D., et al., (2020): Facility for Weather and Climate Assessments (FACTS): A Community Resource for Assessing Weather and Climate Variability. Bull. Amer. Meteor. Soc., 101, E1214–E1224, doi: 10.1175/BAMS-D-19-0224.1


Climate-related events require explanations that are both timely and of scientific merit. Objective assessment of the nature and causes of extreme events is scientifically challenging, and the complexity of physical processes inevitably requires the use of climate models to test and quantify cause-effect linkages.

One key factor to an objective assessment of weather/climate events is data availability, both observational data and model simulations that address the unique environment of a climate-related event under consideration. This site is intended especially for the purpose of enabling near real-time assessments of physical factors driving weather/climate events by a broad scientific community and other interested users.

Monthly Data Tools

Daily Data Tools


CITATION REQUEST: When using model or observational data obtained through FACTS in a publication, please provide a citation in the paper to the original underlying data source. This includes both downloading data and creating analysis figures through FACTS. A list of original sources for citation is here.