Types of Advisories
A statement generally provides additional or follow up informationto an existing weather condition.
An advisory is for less serious conditions that cause significant inconvenience and, if caution is not exercised, could lead to situations that may threaten life and/or property.
A watch is used when the risk of a hazardous weather event has increased significantly, but its occurrence, locations, and/or timing is still uncertain. It is intended to provide advance notice of possible inclement weather.
A warning is used for conditions posing an immediate threat to life or property. Depending on the type of warning, you should take immediate, appropriate action.i
NOAA Preparedness Guidelines
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.
Number A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Heat Index and Wind Chill Charts
Further Reading
Glossary of Meteorology
Federal Meteorological Handbook No. 1
S'COOL Cloud Types Audio/Visual Tutorial
Web Weather for Kids
USA Today - Weather Basics
Weather Facts
LIGHTNING FACTS - Lightning tends to cause injury to the nervous system and may affect any or all parts of the nervous system.