Redondo Beach, WA
CATEGORY 4
WHAT
Flooding is likely, but no major property damage is expected at this time. Tides will be moderately high, and especially during the evening, there is a heightened chance for coastal flooding due to relatively low barometric pressure.
WHEN
The highest risk period will be near the morning high tide around 07:06 AM (tide ~16.5 ft, pressure ~989.9 hPa) and more critically around the evening high tide at 09:30 PM (tide ~19.8 ft, pressure ~1001.0 hPa).
IMPACTS
Low-lying roads near the shoreline could see flooding, along with minor property impacts such as water encroachment in basements or garages close to sea level. Some roads and parking areas adjacent to the beach may become temporarily impassable.
Historical Category 4 floods in this region have featured tides near or above 19.0 ft with pressures in the low 1000s hPa range. Today’s late-evening tide approaches 20 ft while the barometric pressure remains relatively low, aligning with past data that indicates likely, though not severe, coastal flooding.
CATEGORY 4
WHAT
Flooding is likely again on Day 2, mainly associated with the late-evening high tide. Conditions may be similar to Day 1, with elevated tides and moderately low barometric pressure.
WHEN
Greatest risk around the high tide at 10:06 PM (tide ~19.8 ft, pressure ~1000.6 hPa). The morning high tide near 08:18 AM (tide ~16.0 ft, pressure ~997.9 hPa) should be lower risk, though still worth minor caution in especially vulnerable spots.
IMPACTS
Similar to Day 1, expect minor inundation of shoreline roads, with some potential water intrusion into structures located right at coastline levels. Drivers should remain cautious of potential ponding or shallow overwash during these peak tides.
Comparisons to past Category 4 events, such as one in early January 2022 (tide ~19.3 ft, pressure ~992.8 hPa), suggest that while pressures this time are not quite as low, tide heights are in a range that typically produces minor-to-moderate flooding issues.
CATEGORY 4
WHAT
A continuation of likely coastal flooding conditions is expected on Day 3, driven by another near-20 ft evening tide paired with relatively low barometric pressure.
WHEN
Flooding concerns grow in the evening, especially near the 10:42 PM high tide (tide ~19.8 ft, pressure ~995.3 hPa). The morning high tide near 09:36 AM reaches around 15.5 ft, which is lower, but combined with low pressure may still produce isolated minor issues.
IMPACTS
Local roads close to the shoreline and low-lying neighborhoods remain at risk of nuisance flooding. While significant structural damage is not anticipated, flood-prone areas could see shallow, temporary inundation.
Historical data indicates a tide near or below 20 ft can still cause noticeable flooding when pressure approaches the mid- to upper-900s hPa. This aligns with the potential for moderate (Category 4) flooding, but conditions do not resemble the more severe, higher-tide, very-low-pressure scenarios associated with Category 5 or above.
You should monitor later forecasts and be alert for possible Flood Warnings.
Those living in areas prone to flooding should be prepared to take action should flooding develop.
Categories 1-2: No risk of flooding.
Category 3: Close to a flood event and worth monitoring.
Category 4: Flooding is likely however, it is uncertain if this will cause major property damage.
Category 5: Likely to flood and cause property damage.
Categories 6-7: Extremely high risk of flooding and property damage.