(issued Nov. 4 at 1:06PM PST by NWS Portland OR)
* WHAT…For the first Coastal Flood Advisory, tidal overflow flooding expected. For the High Surf Advisory, large waves and hazardous surf conditions. Breakers up to 25-30 feet. For the second Coastal Flood Advisory, tidal overflow flooding expected.
* WHERE…Clatsop and Tillamook Coast, and South Washington Coast.
* WHEN…For the first Coastal Flood Advisory, from 10 AM to 3 PM PST Wednesday. For the High Surf Advisory, from 4 AM to 7 PM PST Thursday. For the second Coastal Flood Advisory, from 10 AM to 3 PM PST Thursday.
* IMPACTS…Minor flooding during high tides is expected in the low lying areas near bays, sloughs, and the lower reaches of the coastal rivers. This is due to total tide up to 12 feet at Toke point resulting in tide up to one foot above ground level, total tide up to 11 feet at Tongue Point resulting in tide up to one foot above ground level, and total tide up to 11 feet at Garibaldi resulting in tide up to one foot above ground level.
Destructive waves may wash over beaches, jetties, and other structures unexpectedly. People can be swept off rocks and jetties and drown while observing high surf. Minor beach erosion may damage coastal properties and buildings. Higher than normal water run- up is expected on beaches and low- lying shoreline.
* ADDITIONAL DETAILS…Sneaker waves are also possible due to high waves and long period energetic periods. Caution should be used when in or near the water. Always keep an eye on the waves, and be especially watchful of children and pets.
Instructions:
A Coastal Flood Advisory means that tidal overflow flooding is expected. Coastal residents in the warned area should be alert for rising water, and take appropriate action to protect life and property. A High Surf Advisory means that high surf will affect beaches, producing rip currents, sneaker waves and beach erosion. Stay well back from the water’s edge and be alert for exceptionally high waves. Keep away from large logs on the beach. Water running up on the beach can easily lift or roll logs which can injure or kill someone caught in their path.