Redondo Beach, WA
CATEGORY 2
WHAT
No flooding is expected on December 4. While tides will reach around 20.1 ft in the early afternoon, the relatively high barometric pressure (around 1020.78 hPa) and NOAA’s low flood likelihood (3.4%) indicate minimal risk of inundation.
WHEN
Highest tide occurs around 2:48 PM PST.
IMPACTS
No significant flooding impacts are anticipated. Normal daily activities in low-lying coastal areas should remain unaffected.
Compared to historical Category 3 events, this day’s forecasted tide and higher barometric pressure lessen flood likelihood. The NOAA distance to threshold (-1.0 m) is roomy enough to prevent typical flood concerns seen in previous moderate events.
CATEGORY 4
WHAT
Moderate coastal flooding is likely on December 5. Early morning high tides, combined with a somewhat lower barometric pressure (hovering near 1007.76 hPa) and an increased NOAA flood likelihood (14.3%), point toward potential inundation along the shoreline.
WHEN
Greatest risk near the early morning high tide around 5:48 AM PST. A secondary higher tide occurs later in the afternoon (around 3:36 PM PST), though the morning tide and lower pressure present the greater concern.
IMPACTS
• Minor to moderate flooding of low-lying roads and parking areas along the immediate coast is likely.
• Potential temporary closures of roads near the waterfront if water overtops curbs.
• Local businesses and residents in historically flood-prone areas should monitor conditions.
This forecast aligns with similar historical Category 4 events where tide heights near 20 ft combined with moderately low barometric pressure triggered noticeable, though not extreme, coastal flooding. The NOAA distance to threshold is -0.53 m, matching past moderate flood scenarios.
CATEGORY 4
WHAT
A continuing risk of moderate coastal flooding on December 6. Tide heights approaching 20.8 ft, a barometric pressure near 1009.15 hPa, and NOAA’s higher flood likelihood (25.4%) suggest persistent flood threats in low-lying beach and waterfront areas.
WHEN
Highest risk near the morning high tide around 6:42 AM PST, with another peak in the late afternoon (around 4:24 PM PST).
IMPACTS
• Flooding of coastal roads and low-lying neighborhood streets is likely.
• Some waterfront business activities may be disrupted.
• Potential for isolated property impacts in very flood-prone spots, though major damage is not expected.
While the anticipated tide levels and NOAA projections exceed those of Day 2, they remain below the historical thresholds associated with Category 5 events (which have included substantially higher tides around 22 ft and notably lower pressures). Still, caution is advised given the elevated likelihood of water reaching into public spaces.
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.
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.