GCM Forecast Monthly Anomaly

These maps display monthly anomaly values of forecast 2-meter temperature, sea surface temperature, and precipitation at multiple leads for a selection of climate models. The climatological base period is 1982-2010 for CFSv2, and 1981-2010 for CMC1 and CMC2.

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 determines the month for which the forecast is valid.

For example, the combination of a forecast start time of 0000 1 Sep 2015 and a monthly lead of 0.5 months (the first monthly lead) will produce a forecast map valid for the month of September 2015. The combination of a forecast start time of 0000 1 Sep 2015 and a monthly lead of 1.5 months (the second monthly lead) will produce a forecast map valid for the month of October 2015 season. The forecast target time and start time will appear at the bottom of the 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.

Helpdesks

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