Redondo Beach, WA
CATEGORY 2
WHAT
No significant flood risk is expected. Although local high tides may approach 19 ft, barometric pressure readings are above critically low levels, and NOAA places the flood likelihood at 0%.
WHEN
Highest tides near 06:12 AM and again late in the evening; however, neither is expected to produce coastal flooding impacts.
IMPACTS
• No flooding anticipated in low-lying or coastal areas.
• Minimal to no disruption of normal activities.
Analysis of historical data shows that tides under 20 ft rarely lead to flooding unless accompanied by very low barometric pressure (below about 992 hPa). On 2025-05-17, pressure remains around 1001–1002 hPa, higher than the critical threshold. Although the tide is moderately high, NOAA’s Flood Likelihood Analysis is 0.0%, consistent with Category 2 (no risk).
CATEGORY 3
WHAT
Close to a flood event and worth monitoring. Tides remain below 21 ft, but barometric pressure dips closer to 994–995 hPa.
WHEN
Main concern during midday (around 12:12 PM) and late afternoon to early evening (around 4:42 PM to 5:00 PM), coinciding with lower barometric pressure.
IMPACTS
• Mainly minor ponding or elevated water along the immediate coastline.
• Low-lying spots near the shore should be watched for brief, localized water accumulation.
Although a barometric pressure near 995 hPa is somewhat low, the projected tide levels (around 19 ft) are still below the higher flood-prone threshold above 21 ft. Historically, similar tides matched with somewhat higher pressure have met Category 3 criteria when flood likelihood was modest or unconfirmed. NOAA’s official flood likelihood remains at 0.0%, so no widespread flooding is expected, but conditions warrant continued observation.
CATEGORY 3
WHAT
Close to a flood event due to notably low barometric pressure (near 991 hPa), but tide heights are below 21 ft, reducing the probability of a significant coastal flood.
WHEN
Highest concern near midday (around 1:18 PM) and late evening (11:00 PM to midnight), when the pressure is forecast to dip below 992 hPa.
IMPACTS
• Localized water buildup possible in the most flood-prone shoreline spots.
• Overall, flood damage is unlikely, but vigilance is advised when traveling in low-lying coastal passages.
Historical Category 4 and 5 events typically pair extremely low pressure with tide heights exceeding 21 ft, but only ~19 ft is expected on 05/19. Despite the very low pressure reading (991 hPa), NOAA’s likelihood calculation remains at 0.0%. Consequently, this places 05/19 as Category 3—close monitoring is recommended, but major flooding is not anticipated.
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.