Definitions per the National Weather Service
Flash Flood Watch: Issued to indicate current or developing hydrologic conditions
that are favorable for flash flooding in and close to the watch area, but the occurrence
is neither certain or imminent.
Flash Flood Warning: Issued to inform the public, emergency management, and
other cooperating agencies that flash flooding is in progress, imminent, or highly
Tornado Watch: This is issued by the National Weather Service when conditions
are favorable for the development of tornadoes in and close to the watch area. Their
size can vary depending on the weather situation. They are usually issued for a
duration of 4 to 8 hours. They normally are issued well in advance of the actual
occurrence of severe weather. During the watch, people should review tornado safety
rules and be prepared to move a place of safety if threatening weather approaches.
Tornado Warning: This is issued when a tornado is indicated by the WSR-88D
radar or sighted by spotters; therefore, people in the affected area should seek
safe shelter immediately. They can be issued without a Tornado Watch being already
in effect. They are usually issued for a duration of around 30 minutes.
Winter Storm Watch: This product is issued by the National Weather Service
when there is a potential for heavy snow or significant ice accumulations, usually
at least 24 to 36 hours in advance. The criteria for this watch can vary from place
Winter Weather Advisory: This product is issued by the National Weather Service
when a low pressure system produces a combination of winter weather (snow, freezing
rain, sleet, etc.) that present a hazard, but does not meet warning criteria.
Winter Storm Warning: This product is issued by the National Weather Service
when a winter storm is producing or is forecast to produce heavy snow or significant
ice accumulations. The criteria for this warning can vary from place to place.
College Action: College administrators will communicate when they become
aware that a county served by the College falls under a watch or warning. The communication
will be sent via email to faculty and staff and possibly by phone or Lanier Alert
depending on the circumstances.
College Closure Due to Weather: See
Severe Weather and Emergency Closing Procedures