Redondo Beach, WA
CATEGORY 2
WHAT Minor coastal flooding expected. Possible inundation of up to 0.5 feet above ground level near shorelines and low-lying areas.
*WHEN From 3:00 AM to 5:00 AM PST.
IMPACTS Minor flooding of low-lying areas, parks, and roads. Isolated road closures possible.
The barometric pressure is significantly higher than the threshold associated with past flooding events, suggesting less severe weather conditions. The high tide at 04:06 with a mean pressure MSL of 1026.040 hPa is not indicative of a major flood risk, especially when compared to historical events that had much lower pressures and higher tide levels for Category 4 or higher events. The NOAA Flood Likelihood for this date is low at 0.1%, with a distance to threshold of -1.11m, which supports the forecast of a lower category event.
CATEGORY 3
WHAT Elevated risk of coastal flooding. Potential for up to 1 foot of inundation above ground level in some shorelines and low-lying areas.
WHEN From 4:00 AM to 10:00 AM PST.
IMPACTS Moderate flooding of coastal areas, parks, and roads with some road closures expected. Property damage is unlikely but possible in very low-lying areas.
The barometric pressure on this day shows a decreasing trend, reaching closer to the threshold that indicates increased flood risk. The high tide at 04:36 with a mean pressure MSL of 1021.169 hPa and another high tide at 09:18 with a mean pressure MSL of 1017.710 hPa suggest an increased risk when compared to the previous day. The NOAA Flood Likelihood remains low; however, the decreasing pressure warrants a higher category rating.
CATEGORY 4
WHAT Likely coastal flooding with potential for significant property damage in vulnerable areas due to high tide and low barometric pressure.
WHEN From 4:30 AM to 7:00 PM PST.
IMPACTS Likely flooding of coastal properties, roads, and infrastructure with potential for significant property damage. Precautionary measures should be taken by residents in flood-prone areas.
The barometric pressure on this day is forecasted to be significantly lower than previous days, with high tides at both 05:06 and 18:42 having mean pressures MSL well below the historical thresholds associated with Category 4 events. This aligns closely with conditions seen during previous Category 4 events in terms of both tide height and barometric pressure. The NOAA Flood Likelihood data indicates a low percentage; however, the combination of low pressure and high tides is concerning and justifies the Category 4 rating.
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.