Flooding Advisory Definitions:
Flood Watch - high flow or overflow of water from a river is possible in the given time period. It can also apply to heavy runoff or drainage of water into low-lying areas. These watches are generally issued for flooding that is expected to occur at least 6 hours after heavy rains have ended.
Flood Warning - flooding is actually occurring or is imminent in the warning area.
Flash Flood Watch - flash flooding is possible in or close to the watch area. Flash Flood Watches are generally issued for flooding that is expected to occur within 6 hours after heavy rains have ended.
Flash Flood Warning - flash flooding is actually occurring or is imminent in the warning area. It can be issued as a result of torrential rains, a dam failure, or ice jam.
* Information provided by: The Weather Channel