| Weather Categories |
|---|
 | World Meteorological Day (WMD)
(annually: 23 March)
|
 | International Meteorological Centenary
(100th anniv. IMO-WMO: 1873-1973)
|
 | World Weather Watch (WWW) and
Global Atmosphere Watch (GAW)
|
 | 50th Anniversary of the World Meteorological Organization (WMO)
(1950-2000)
|
| World Meteorological Organization (WMO)
(Does not include WMO-specific
(WMD, IMO-WMO Centenary, WWW,
GAW, and 50th Anniversary WMO)
items in the links directly above.)
|
 | Global Atmospheric Research Program (GARP),
GARP Atlantic Tropical Experiment (GATE), and
Global Weather Experiment (GWE)
(also World Ocean Circulation Experiment (WOCE))
|
 | National weather services, centers, observatories,
and their anniversaries
(as well as meteorological schools and training facilities,
and private meteorological services or organizations)
|
| Weather-Related Programs |
|---|
 | International Polar Year (IPY)
(1st: 1882-1883; 2nd: 1932-1933;
3rd: see IGY; 4th: 2007-2008)
|
 | International Geophysical Year (IGY)
(1957-1958)
|
 | International Quiet Sun Year (IQSY)
(1964-1965)
|
 | International Heliophysical Year (IHY)
(2007-2009)
|
 | International Hydrological Decade (IHD)
(1965-1974)
|
 | International Decade for Natural Disaster Reduction (IDNDR)
(1990s)
|
 | Peaceful Uses of Outer Space (PUOS)
|
 | Mission To Planet Earth (MTPE)
|
 | Scientific Committee on Antarctic Research (SCAR)
|
| Weather Instruments and Measurements |
|---|
 | Thermometers, temperatures and temperature units
|
 | Barometers, atmospheric pressure and pressure units
|
 | Anemometers, windsocks, wind vanes, and wind measurements
|
 | Weather balloons and radiosondes
(and pilot balloons, tracking theodolites, tracking tntennas, and
Eole, Argos and other un-manned stratospheric balloons)
|
  | Precipitation (rain and snow) gauges
(and evaporation pans, water-depth gauges,
and snow-depth measurements)
|
 | Sunshine recorders/heliographs, actinometers, and pyranometers
|
 | Ground-based remote sensing in meteorology
(radar, lidar, sodar, etc.)
|
 | Stevenson screens
(weather instrument shelters)
|
 | Weather maps
(surface and upper-level weather maps, station models,
weather symbols, streamlines, and other weather maps)
|
| Weather Elements |
|---|
 | Ozone (O3)
(and World Ozone Day, annually: 16 September;
and Montréal Protocol, 1987)
|
 | Clouds and skies
(only items with clear intent to show clouds)
|
 | Tornadoes, waterspouts, and dustdevils
|
 | Hurricanes, typhoons, and tropical cyclones
(and tropical cyclone relief overprints)
|
  | Weather modification
(rain enhancement, and hail and lightning suppression)
|
Meteorologists, atmospheric scientists,
and other contributors to meteorology |
|---|
 | Chronological and alphabetical indexes
|
