Flood Watch

Redondo Beach, WA

Day 1: 2024-09-16

CATEGORY 2

WHAT Minor coastal flooding expected. Possible inundation of up to 1 foot above ground level near shorelines and low-lying areas.

*WHEN From 02:00 AM to 04:00 AM PST and from 04:00 PM to 06:00 PM PST.

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

ADDITIONAL DETAILS...

On September 16, the high tide at 02:18 AM is expected to reach a height of approximately 17.909 feet with a barometric pressure of 1010.06 hPa. The second high tide at 04:00 PM will reach around 19.35 feet with a barometric pressure of 1017.55 hPa. The barometric pressures are relatively high compared to historical severe flood events, reducing the likelihood of significant flooding. Wind speeds are moderate, and the wind direction is not expected to exacerbate flooding conditions.

Day 2: 2024-09-17

CATEGORY 2

WHAT Minor coastal flooding expected. Possible inundation of up to 1 foot above ground level near shorelines and low-lying areas.

WHEN From 03:00 AM to 05:00 AM PST and from 04:00 PM to 06:00 PM PST.

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

ADDITIONAL DETAILS...

On September 17, the high tide at 03:18 AM is expected to reach a height of approximately 18.446 feet with a barometric pressure of 1017.08 hPa. The second high tide at 04:30 PM will reach around 19.669 feet with a barometric pressure of 1014.95 hPa. The barometric pressures remain relatively high, suggesting less severe weather conditions and a lower likelihood of significant flooding. Wind speeds are moderate, and the wind direction is not expected to exacerbate flooding conditions.

Day 3: 2024-09-18

CATEGORY 3

WHAT Moderate coastal flooding possible. Inundation of up to 2 feet above ground level near shorelines and low-lying areas.

WHEN From 04:00 AM to 06:00 AM PST and from 04:00 PM to 06:00 PM PST.

IMPACTS Moderate flooding of low-lying areas, parks, and roads. Some road closures possible.

ADDITIONAL DETAILS...

On September 18, the high tide at 04:12 AM is expected to reach a height of approximately 18.83 feet with a barometric pressure of 1014.05 hPa. The second high tide at 04:54 PM will reach around 19.925 feet with a barometric pressure of 1013.75 hPa. While the barometric pressures are higher than in historical severe flood events, the tide heights are significant enough to warrant close monitoring for potential moderate flooding, especially in low-lying areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.


Forecast Reasoning:

Step-by-Step Analysis:

  1. Assess Barometric Pressure:
  2. For all three days, the barometric pressures are above the critical threshold (992.8 hPa), indicating less severe weather conditions compared to historical severe flood events.

  3. Evaluate Tide Height:

  4. Tide heights on all three days are significant but not extreme compared to historical Category 4 or Category 5 events.

  5. Consider Wind Direction:

  6. Wind directions are not aligned with those that have historically exacerbated flooding conditions.

  7. Integrate NOAA High Tide Flooding Likelihood:

  8. NOAA's forecast indicates a low likelihood of flooding for all three days.

  9. Synthesize Information and Forecast Flood Category:

  10. Given the relatively high barometric pressures and significant but not extreme tide heights, the flood potential for September 16 and September 17 is categorized as Category 2 (minor risk). For September 18, due to slightly higher tide heights, it is categorized as Category 3 (moderate risk).

This analysis provides a clear understanding of potential flood risks based on current data while emphasizing the importance of monitoring updates from local authorities for any changes in conditions.