National Weather Service Glossary
This glossary contains information on more than 2000 terms, phrases and abbreviations used by the NWS. Many of these terms and abbreviations are used by NWS forecasters to communicate between each other and have been in use for many years and before many NWS products were directly available to the public. It is the purpose of this glossary to aid the general public in better understanding NWS products.
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- 1) Fahrenheit- The standard scale used to measure temperature in the United States. On this scale, the freezing point of water
is 32Â°F and the boiling point is 212Â°F. To convert a Celsius temperature to Fahrenheit, multiply it by 9/5 and
then add 32:
Â°F = (Â°C * 9/5) + 32
2) Fog- Water droplets suspended in the air at the Earth's surface. Fog is often hazardous when the visibility is reduced to Â¼ mile or less.