Flood Watch

Redondo Beach, WA

Day 1: 2024-03-19

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 2:00 AM to 3:00 AM PST and again from 11:00 AM to 12:00 PM PST.

IMPACTS Minor flooding of low-lying areas, parks, and roads. Isolated road closures possible.

ADDITIONAL DETAILS...

The barometric pressure during the high tides of 1019.1 hPa and 1024.1 hPa is significantly higher than the threshold that has historically indicated severe flooding (below 992.8 hPa). The tide heights are not reaching the levels seen in past Category 4 or higher events, and NOAA's Flood Likelihood Analysis indicates a low likelihood of flooding for this date. Wind direction is not provided, but given the other factors, the risk remains low.

Day 2: 2024-03-20

CATEGORY 2

WHAT Minor coastal flooding potential persists with limited impact.

WHEN Highest risk near high tide at approximately 1:24 PM PST and again around 9:36 PM PST.

IMPACTS Similar minor impacts as Day 1 with potential for nuisance flooding in susceptible areas.

ADDITIONAL DETAILS...

Continued high barometric pressure readings of 1021.8 hPa and 1020.5 hPa during high tides suggest stable weather conditions less conducive to severe flooding. The NOAA Flood Likelihood remains low for this date, and tide heights are not exceptional compared to historical Category 4 or higher events.

Day 3: 2024-03-21

CATEGORY 3

WHAT Elevated risk of coastal flooding due to lower barometric pressure and high tide.

WHEN Increased risk around high tides at approximately 3:48 AM PST and again at 2:24 PM PST.

IMPACTS Potential for moderate flooding of coastal areas, roadways, and structures in low-lying zones. Some property damage is possible if preventative measures are not taken.

ADDITIONAL DETAILS...

The barometric pressure drops to a lower level of 1015.8 hPa during the morning high tide and further to 1013.3 hPa by the afternoon, which is closer to historical events that resulted in more significant flooding. While still above the critical threshold observed in past severe events, this decrease in pressure warrants a higher category rating. NOAA's Flood Likelihood Analysis continues to indicate a low likelihood of flooding; however, the proximity to historical Category 4 conditions suggests a cautious approach for this day.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Residents and businesses 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 adhere to any advisories or evacuation orders that may be issued.