Flood Watch

Redondo Beach, WA

Day 1: 2025-09-18

CATEGORY 2

WHAT
No apparent flood risk. High tides (peaking near 19.2 ft) are expected, but barometric pressure remains relatively high around 1015 hPa, and NOAA’s flood likelihood is listed as low (0%).

WHEN
Highest tide near 15:36 PST on 2025-09-18.

IMPACTS
No flooding anticipated given the current readings. Minor ponding in extremely low-lying spots could occur, but widespread impacts are unlikely.

ADDITIONAL DETAILS...

• Tides reaching around 19 ft are below historical flood-triggering heights (often above 20 ft) and are coupled with moderately high atmospheric pressure.
• Winds are moderate from northerly directions, not aligning to push significant water onshore.
• Compared to past Category 3-4 events (which featured lower barometric pressure and/or higher tidal heights), current parameters do not support a flood scenario.


Day 2: 2025-09-19

CATEGORY 2

WHAT
No apparent flood risk. Tides may again approach near 19 ft, but the barometric pressure (1014.8–1017.1 hPa) remains well above the low-pressure thresholds historically associated with flooding.

WHEN
Highest tides around mid-morning (10:42 PST) and mid-afternoon (16:06 PST).

IMPACTS
No significant flooding impacts expected. Minor splashing along the waterfront possible but should not affect property or roads.

ADDITIONAL DETAILS...

• NOAA’s official likelihood remains at 0%, signifying limited concern.
• Comparisons with earlier Category 4-5 events show drastically lower pressures and/or higher tides than those forecast for this date.
• Wind directions generally are not from the more flood-prone W/SW sector, minimizing any storm surge effect.


Day 3: 2025-09-20

CATEGORY 2

WHAT
Still no significant flood risk indicated. Peak tides close to 19 ft coincide with continued moderate-to-high pressure forecasts (~1017.5 hPa).

WHEN
Mid-afternoon high tide near 16:24 PST projected to be the highest of the day.

IMPACTS
Likely minimal. Coastal areas and low-lying spots should not experience notable flooding under these conditions.

ADDITIONAL DETAILS...

• NOAA data for this day also show a 0% flood likelihood, consistent with the stable atmospheric pressure.
• Historically, tall tides paired with much lower pressure triggered flooding. Current conditions do not align with that pattern.
• Winds appear stronger at times from the SW, but barometric pressure remains sufficiently high to offset significant coastal inundation risk.


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.

CATEGORY KEY

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.