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DefinitionsFlash Flood: Is the result of heavy rains causing sudden flooding in a specific area, this can occur without any visible sign of rain in your 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 six (6) hours after heavy rains have ended. Flash Flood Warning: Flash Flooding is actually occurring or is imminent in the warning are. It can be issued as a result of torrential rains, a dam failure, or ice jam. 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 six (6) hours after heavy rains have ended. Flood Warning: Flooding is actually occurring or is imminent in the warning area. Severe Thunderstorm Watch: Conditions are conductive to the development of severe thunderstorms in and close to the watch area. Severe Thunderstorm warning: A severe thunderstorm has actually been observed by spotters or indicated on radar, and is occurring or is imminent in the warning area. Tornado Watch: Conditions are conductive to the development of tornadoes in and close to the watch area. Tornado Warning: A tornado has actually been sighted by spotters or indicated on radar and is occurring or is imminent in the warning area. Winter Storm Watch: A significant winter weather (heavy snow, heavy sleet, significant freezing rain, or a combination of events) is expected, but not imminent, for the watch area; provides 12 to 36 hours notice of the possibility of severe winter weather. Winter Storm Warning: A significant winter storm or hazardous winter weather is occurring, imminent, or likely, and is a threat to life and property. Blizzard Warning: Winds that are at least 35 MPH or greater, blowing snow that will frequently reduce the visibility to 1/4 mile or less for a duration of at least three (3) hours, and dangerous wind chills are expected in the warning area Winter Weather Advisory: When a significant winter storm or hazardous winter weather is occurring, imminent, and is an inconvenience.
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