ASOS Instruments:
Weather conditions are monitored continuously across the United States by the National Weather
Service using Automated Surface Observing Systems (ASOS). The ASOS instrument suite includes a
variety of instruments. You can view each of these instruments online. The instruments and the
measured variables are described in the text.
Satellite Views from Space:
Two geostationary satellites are normally available operationally to view weather over North America and adjacent oceans.
Satellite animations of the weather for the 48-hour period beginning 5 January 2002 are available from each of these satellites.
During this period, a large cyclone develops along the Gulf Coast and moves northeast. At the same time, a large cyclone
over the Pacific moves on the West Coast of the United States.
Site provided by the Office of the Federal Coordinator for Meteorology; includes
discussion about rawinsondes and information on the federal standards for taking observations.
