Redondo Beach, WA
CATEGORY 3
WHAT Minor coastal flooding expected. Possible inundation of up to 1 foot above ground level near shorelines and low-lying areas.
*WHEN From 5:00 PM to 8:00 PM PST.
IMPACTS Minor flooding of low-lying areas, parks, and roads. Isolated road closures possible.
The barometric pressure during the high tide at 6:00 PM is forecasted to be 1012.97998046875 hPa, which is significantly higher than the threshold associated with past Category 5 events. However, the tide height is expected to reach levels that have previously been associated with Category 3 events. The wind direction is from the south-southwest, which may contribute to water being pushed toward the shore but is not as critical as a westerly or northwesterly wind would be in this region. The NOAA flood likelihood for this date is low, with a 0.0% chance of flooding, which supports the Category 3 assessment.
CATEGORY 5
WHAT Significant coastal flooding expected with potential property damage.
WHEN From early morning around 5:00 AM to late evening around 7:00 PM PST.
IMPACTS Major flooding of coastal areas, significant inundation of roads, properties, and infrastructure. Evacuations may be necessary in vulnerable areas.
The barometric pressure during the high tides at both 5:36 AM and 6:42 PM are forecasted to be near or below the critical threshold of 992.8 hPa, which has historically been associated with Category 5 events. The tide heights are not as extreme as those seen in past Category 5 events but are still significant enough to warrant concern when combined with the low barometric pressures. The NOAA flood likelihood remains low; however, the pressure readings are a strong indicator that overrides this factor in the assessment for potential flooding.
CATEGORY 6
WHAT Severe coastal flooding expected with extensive property damage and potential for loss of life if proper precautions are not taken.
WHEN From early morning around 6:00 AM to late evening around 8:00 PM PST.
IMPACTS Extensive flooding of coastal areas, severe inundation of roads, properties, and infrastructure. Widespread evacuations likely necessary in vulnerable areas.
The barometric pressure during both high tides at 6:00 AM and 7:30 PM is forecasted to be at a critical low of approximately 990.78 hPa, which is well below the threshold associated with severe flooding events. This pressure reading is similar to that observed during past Category 5 events and when combined with high tide levels poses a significant risk for severe flooding. The NOAA flood likelihood data indicates a low chance of flooding; however, given the historical context and the extremely low barometric pressures expected, a higher category rating is warranted for this day.
Residents 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. Consult local authorities or experts for final decision-making in flood-related situations and follow any evacuation orders or safety instructions provided by emergency services.