NMME Monthly Anomalies

These maps display anomaly values of forecast 2-meter temperature, sea surface temperature, and precipitation at multiple leads and start times during the year for a selection of climate models. The climatological base period is 1982-2010 for CFSv2, CCSM3, CCSM4, and GFDL-CM2p1 and 1981-2010 for CMC1, CMC2, GFDL-CM2p5-FLOR-A06, GFDL-CM2p5-FLOR-B01, and NASA-GMAO.

Use the drop-down menus at the top of the page to select the model, variable, and monthly lead. Mouse over the map to select the forecast start time from a control that appears just above the map. Select a combination of the forecast start time and the monthly lead time to produce a map for a target month. The forecast starts occur at the beginning of a month, and adding together the forecast start time and the lead time (monthly lead) determines the month for which the forecast is valid.

For example, for a monthly forecast, the combination of a forecast start time of 0000 1 Sep 2015 and a monthly lead time of 0.5 months (the first monthly lead) will produce a forecast map valid for the month of September 2015. The forecast target time and start time will appear at the bottom of the map.


In order to document NMME-Phase II data impact and enable continuing support, users of NMME data are expected to acknowledge NMME data and the participating modeling groups. The NMME model output should be referred to as "the NMME System Phase II data [https://www.earthsystemgrid.org/search.html?Project=NMME]." In publications, users should include a table (referred to below as Table XX) listing the models and institutions that provided model output used in the NMME-Phase II system, as well as the digital object identifier of publications documenting the models, where "Table XX" in the paper should list the models and modeling groups that provided the NMME data. In addition, an acknowledgement similar to the following should be included in any publication: "We acknowledge the agencies that support the NMME-Phase II system, and we thank the climate modeling groups (Environment Canada, NASA, NCAR, NOAA/GFDL, NOAA/NCEP, and University of Miami) for producing and making available their model output. NOAA/NCEP, NOAA/CTB, and NOAA/CPO jointly provided coordinating support and led development of the NMME-Phase II system." Besides the above acknowledgement, users should register any journal articles (or other scientific documents) that are based on NMME-Phase II results.


Kirtman, Ben P., and Coauthors, 2014: The North American Multimodel Ensemble: Phase-1 seasonal-to-interannual prediction; Phase-2 toward developing intraseasonal prediction. Bull. Amer. Meteor. Soc., 95, 585–601. doi: http://dx.doi.org/10.1175/BAMS-D-12-00050.1


Access the dataset used to create this map.

How to use this interactive map

Return to the menu page: Click the blue link called “Portal” at the top left corner of the page.


Contact help@iri.columbia.edu with any technical questions or problems with this Map Room.