Modern Seasonal Cycle

Animations within this group depict the modern seasonal cycle of common meteorological parameters as derived from monthly ERA-Interim reanalysis. Each frame represents an average of values from 1979-2000, thus providing a climatological signal.
Temperature

GIF (6.5 mb)

Temperature Anomaly
2001-2012 - 1979-2000

GIF (7.0 mb)

Precipitation

GIF (8.1 mb)

Precipitable Water

GIF (7.1 mb)

Surface Wind

GIF (10.0 mb)

Mean Sea Level Pressure

GIF (7.8 mb)

Snow/Ice/Vegetation Seasonal Cycle

These animations depict the modern seasonal cycle of snow, ice, and vegetation. The animations are made from NASA Blue Marble satellite imagery (monthly composites captured during 2004) with 1979-2000 sea-ice climatology from NCEP CFSR overlain.
World

GIF (4.3 mb)

Northern Hemisphere

GIF (5.1 mb)

Last Glacial Maximum Seasonal Cycle

These animations depict the temperature and precipitation seasonal cycle of the Last Glacial Maximum (ca. 21,000 years ago), as calculated from the Community Climate System Model version 4 (CCSM4) (see publication). Each frame is a 50-year average.
Temperature

GIF (6.7 mb)

Precipitation

GIF (7.5 mb)

Weather — Cold Front

Below are 48-hour forecast animations (temperature, precipitable water, precipitation and clouds, and wind) from the North American Mesoscale Model (NAM) depicting a large airmass descending from northwestern Canada across central and eastern U.S. The boundary of the airmass is delineated by an impressive cold front with a broad arc of clouds, snow, rain, and wind. The forecast was valid on Sunday, November 10th, 2013.
Temperature

GIF (17 mb)

Precipitation and Clouds

GIF (23 mb)

Precipitable Water

GIF (13 mb)

Surface Wind

GIF (27 mb)