350BC - Aristotle wrote Meteorology.
25 - Pomponius Mela formalizes the climatic zone system.
1620 - Francis Bacon analyzes the scientific method in his Great Instauration of Learning.
1686 - Edmund Halley presents a systematic study of the trade winds and monsoons and identifies solar heating as the cause of atmospheric motions.
1686 - Edmund Halley establishes the relationship between barometric pressure and height above sea level.
1714 - Gabriel Fahrenheit creates reliable scale for measuring temperature with a mercury-type thermometer
1716 - Edmund Halley suggests that aurorae are caused by "magnetic effluvia" moving along the Earth's magnetic field lines.
1742 - Anders Celsius, a swedish astronomer, proposed the centigrade scale for thermometers.
1842 - Elias Loomis performed an experiment to gain insight into the wind speed needed to defeather a chicken. He loaded a cannon with gun powder and a chicken.
1860 - 500 U.S. telegraph stations are making weather observations and submitting them back to the Smithsonian Institution. The observations are later interrupted by the Civil War.
1869 - Joseph Lockyer starts the scientific journal Nature.
1890 - Weather Bureau is created as a civilian operation under the U.S. Department of Agriculture.
1898 - Weather Bureau established a hurricane warning network in the West Indies.
1900 - Hurricane strikes Galveston, Texas, killing over 6,000 people.
1920 - Milutin Milankovic proposes that long term climatic cycles may be due to changes in the eccentricity of the Earth's orbit and changes in the Earth's obliquity.
1925 - "Tri-State" tornado runs through Missouri, Illinois, and Indiana killing 695 people.
1935 - Robert Watson-Watt and his assistant Arnold Wilkins published a report in February 1935, titled The Detection of Aircraft by Radio Methods.
1935 - The "Great Labor Day Hurricane" kills 408 people. It is rated as the most intense Category 5 Atlantic hurricane to make landfall.
1934 to 1937 - The Dust Bowl drought of the US plains region causes harsh economic damage.
1937 - Army Air Forces Weather Service was established (redesignated in 1946 as AWS-Air Weather Service).
1941 - Pulsed radar network is implemented in England during WWII.
1948 - First correct tornado prediction by R. C. Miller and E. J. Fawbush.
1950 - Hurricanes begin to be named alphabetically with the radio alphabet.
1951 - WMO World Meteorological Organization established by the United Nations.
1953 - National Hurricane Center (now NOAA National Hurricane Center) creates a system for naming hurricanes using alphabetical lists of women's names.
1955 - NSSP National Severe Storms Project established.
1956 - The Weather Bureau creates the National Hurricane Research Project.
1957-1958 - International Geophysical Year coordinated research efforts in eleven sciences, focused on polar areas during the Solar Maximum.
1969 - Saffir-Simpson Hurricane Scale created, used to describe hurricane strength on a category range of 1 to 5.
1969 - Hurricane Camille, the second Category 5 hurricane to make US landfall causes $1.4 billion in damage.
1970 - NOAA National Oceanic and Atmospheric Administration established. Weather Bureau is renamed the National Weather Service.
1971 - Ted Fujita introduces the Fujita scale for rating tornadoes.
1975 - The first Geostationary Operational Environmental Satellite, GEOS, was launched into orbit. Their role and design is to aid in hurricane tracking.
1980 - Mount St. Helens erupts explosively in Washington State.
1988 - WSR-88D type weather radar implemented in the United States. Weather surveillance radar that uses several modes to detect severe weather conditions.
2003 - NOAA hurricane experts issue first experimental Eastern Pacific Hurricane Outlook.