NORTHERN COASTAL HUMBOLDT — * WHAT...For the High Surf Advisory, large breaking waves 22 to 24 feet. For the Coastal Flood Advisory, High astronomical tides will cause minor flooding in low lying areas around Humboldt Bay. Up to one half foot of saltwater inundation above ground level is possible near shorelines and tidal waterways. Between 8.7 and 8.9 feet MLLW at the North Spit tide gauge is predicted.
* WHERE...Northern Coastal Humboldt County.
* WHEN...For the High Surf Advisory, from 4 AM to 10 PM PST Sunday. For the Coastal Flood Advisory, from 10 AM to noon PST Sunday. High tide is at 10:21 AM at the Humboldt Bay North Spit tide gauge. Saltwater inundation will be possible 1 to 2 hours before and after high tide.
* IMPACTS...Flooding of low lying areas around Humboldt Bay including parks and roads with only isolated closures expected. Flooding will likely impact Jackson Ranch Road in the Arcata Bottoms and several roads in King Salmon. Dangerous surf conditions and localized beach erosion. Beachcombing is highly discouraged!
* ADDITIONAL DETAILS...The large surf on Sunday will coincide with high astronomical tides and high tidal anomalies. This will allow significant runup onto area beaches and may impact normally dry land or even roads or parking lots.
Flooding in Northern Coastal Humboldt can cut off roads with little warning, damage homes near low-lying areas, and disrupt power and water service. Even a few inches of moving water can carry away a vehicle.
This report is based on information from NWS, monitored by Alert USA's verified emergency feed.
Alert USA anticipates a high chance of travel disruptions, elevated property risk in low-lying areas, and possible power outages while the event is active.
Recommended steps: avoid flooded roads — turn around, don't drown; move to higher ground if you are in a low-lying area; charge phones and prepare for power loss; check on family and neighbors.
Alert USA is tracking this flood event and will update this report as verified information becomes available.
Verified by Alert USA • NWS