![]() ![]() All related data (flood levels, impacts, historical crests) were updated to reflect datum change. An Areal Flood Warning is issued for flooding that occurs more gradually, normally from prolonged and persistent moderate to heavy rainfall. Geological Survey (USGS) Data and Site Info for Corvallisĭatum was changed by 10 FEET in 2010. ![]() Older USGS topographic maps, MSL benchmarks Existing AHPS content and features will be preserved and expanded within NWPS. Issued to inform public if general area wide flooding is expected. A Flood Warning is issued when flooding is imminent or occurring. It does not mean flooding will occur, but it is possible. Older USGS topographic maps, NGVD29 benchmarks Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. A Flood Watch is issued when conditions are favorable for flooding. Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps The river is at bankfull level and may spill out of its banks at some locations between Harrisburg and Albany. Flooding of low areas of Hwy 34 and numerous roads in and near Corvallis begins.Įxpect flooding of some river island access roads and secondary roads east of Corvallis. It is intended to inform the public and cooperating agencies (including ambulance services and fire departments that may assist in water rescues) in advance of. At this and higher stages, the Willamette River between Harrisburg and Corvallis has historically been up to 3 miles wide.Įxpect flooding of low spots of Hwy 99 south of Corvallis, the Corvallis-Albany Hwy, and Hwy 34 near Corvallis.Įxpect extensive flooding of low-lying agricultural land east and south of Corvallis. An areal flood watch is in effect for Coastal and Metro Palm Beach County until 8 p.m. Areal flood watch (FLA) Hydrometeorological conditions favor a threat of areal flooding affecting area streets, rivers, streams, and/or urban storm drains within six to 24 hours. If you notice any errors in the below information, please contact our WebmasterĮxpect widespread flooding, with serious flooding possible between Corvallis and Albany on the west bank of the river. Is the approximate location based on the latitude/longitude coordinates Latitude/Longitude Disclaimer: The gauge location shown in the above map ![]()
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