A River Flood Warning is issued when a river is forecast to go above its designated flood stage at the forecast point. An Areal Flood Warning is issued for flooding that occurs more gradually, normally from prolonged and persistent moderate to heavy rainfall. Flash Flood Warnings are issued for flooding usually occurring within 6 hours of heavy rain. It focuses on specific counties, communities, streams, or areas. A Flash Flood Watch may also be issued for a potential dam break.Ī Flood or Flash Flood Warning is issued to inform the public that flooding is imminent or in progress. Persons in the watch area are advised to check flood action plans, keep informed, and be ready to take necessary actions if a warning is issued or flooding is observed. The occurrence of flooding is neither certain nor imminent. Flood Watches are issued to inform the public, cooperating agencies, and other interests that the current and/or developing weather pattern is such that there is a potential for rapid flooding (also known as flash flooding), more widespread areal flooding, or river flooding. Much like our Severe Thunderstorm and Tornado Watches and Warnings, we issue Flash Flood Watches and Warnings. Sometimes, it can be difficult to differentiate between our flood products and what they mean, so let's take a look at each of them in hopes of clearing up any misconceptions or misunderstandings. These systems can produce flash flooding in low lying flood prone areas and along small creeks and streams, as well as river flooding along mainstreams. Flooding can result from a number of weather systems including slow-moving or stationary frontal systems, inland moving tropical cyclones and intense summertime thunderstorms. This results in a gradual ponding or buildup of water in low-lying, flood-prone areas, as well as small creeks and streams.”įlood watches are in effect through Friday for Little Bear River below the Hyrum Reservoir and the Weber River near Plain City.Flash Flood Warning, Areal Flood Warning, River Flood Warning or Urban and Small Stream Flood AdvisoryĪ variety of flooding and related phenomena place Central Alabama at risk throughout the year. The weather service defines an areal flood warning as “normally issued for flooding that develops more gradually, usually from prolonged and persistent moderate to heavy rainfall. An areal flood advisory is in effect until Wednesday afternoon for Birdseye in Utah County along U.S. The National Weather Service also put into effect an areal flood warning from Tuesday to Thursday afternoon for flooding near Garden City in Rich County to the Idaho border. Little Bear River is forecasted to reach flood stage Tuesday, Wednesday and Thursday night, with a peak late Tuesday into early Wednesday. Sevier River will have moderate flows peaking Tuesday and Wednesday but flood levels will continue through Friday evening. The Ogden River flood warning will peak Friday morning but flooding is expected to linger through the beginning of next week. The flow is anticipated to peak Thursday morning at 160 cubic feet per second. The flood warning in Emigration Creek is expected to impact the east bench of Salt Lake City with flows through Wednesday night. The National Weather Service issued flood warnings for Emigration Creek in Emigration Canyon, the South Fork of the Ogden River near Huntsville, Sevier River near Hatch, in Garfield County, and the Little Bear River in Paradise, in Cache County. Several areas in Utah are under flood warnings as spring runoff causes water levels to rise.
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