July 8: Coastal Disturbance Detected

Jonathan Carr
By Jonathan Carr July 8, 2020 10:43

July 8: Coastal Disturbance Detected

Discussion: A low pressure disturbance is currently forming on the coastal border of North and South Carolina. We’re not talking about a powerful system but organized enough to bring nuisance-to-mildly-disruptive conditions to the E US coast (OBX to NYC) between tonight and Friday.

Model guidance never really drops the surface low below 1004mb even when the storm reaches maximum strength Thursday night into Friday morning/afternoon. So again, this is not as much of a dangerous hazard as it is a plan disrupter for the beaches.

This system, whether the National Hurricane Center (NHC) names it Fay or not (for sub-tropical justification) will likely bring moderate to possibly heavy rainfall (at times) to most of New Jersey between late-Thursday PM and Friday afternoon with Friday morning likely the main slug of precipitation.

Winds will likely not be destructive especially away from the immediate coast. My gut feel is about 15-25mph sustained with gusts to 40mph for the immediate coast with lesser values away from the ocean. My only real concern about wind is the potential coastal flooding that could result from the prolonged onshore flow (out of the E/SE). My best gut feel on that are minor levels of coastal flooding all below Highest Astronomical Tide (HAT) levels. Water in the streets that normally see water in the streets and only for 1-2 high tides, not 4-6 high tides like a traditional stalled or retrograded nor’easter.

In English: Initial winds should pick up off the ocean late Thursday evening for New Jersey, primarily for immediate ocean-facing coastal areas of ECNJ and SENJ. Moderate rainfall is possible from late Thursday night through early Friday afternoon. Minor coastal flooding is possible for SENJ/ECNJ during this window. The system is a fast mover and should be out of here by Friday afternoon. The bottom line is that we’re looking at a nuisance coastal event not a destructive one. That’s my gut feel for now and I will update accordingly. Have a great day and please be safe! JC

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Jonathan Carr
By Jonathan Carr July 8, 2020 10:43