Flood

• Advisory: N/A
• Watch: A flood watch is issued when conditions are favorable for flooding
• Warning: A flood warning is issued when flooding is occurring or imminent

Urban & Small Stream Flood

• Advisory: An urban and small streams flood advisory is issued when flooding of small streams, streets, and low-lying areas, such as railroad underpasses and urban storm drains, is imminent or occurring
• Watch: N/A
• Warning: N/A

Flash Flood

• Advisory: N/A
• Watch: A flash flood watch is issued when conditions are favorable for flash flooding; a flash flood watch covers flash flooding, widespread urban and small stream, and headwater flood events
• Warning: A flash flood warning is issued when flash flooding is imminent or occurring; situations resulting in a flash flood include but are not limited to locally heavy rainfall, a dam or levee failure, or water released from an ice jam rapidly flooding nearby land

River Flood

• Advisory: N/A
• Watch: A river flood watch is issued when river flooding is possible at one (1) or more forecast points along a river
• Warning: A river flood warning is issued when river flooding is imminent or occurring at one (1) or more forecast points along a river