Built by neighbors. Validated against 7 documented basement-flooding events. Powered by the National Weather Service. Free, open, and not going anywhere.
Hourly precipitation rates from NWS gridded forecast. The red line is 0.8 inches per hour — the validated threshold at which the combined sewer system loses capacity and basements begin to flood.
Source: NWS gridpoint forecast for 40.79°N, 74.02°W. Last updated —. Page auto-refreshes every 15 minutes.
Every time you open or refresh this page, your browser pulls the next 156 hours of hourly rainfall forecast directly from api.weather.gov — the official US National Weather Service. The page then scans that forecast for any hour above 0.8″/hr, the validated threshold at which the corridor's combined sewer system loses capacity.
While the tab stays open, the page re-checks NWS every 15 minutes and again whenever you switch back to it. There is no server, no database, and no tracking — the entire warning system is one HTML file talking directly to the federal weather service.
What this means for you: bookmark this page and open it before any rain in the forecast. If you want to be alerted automatically (text or email) when the forecast crosses the threshold, email nbfloodwatch@gmail.com and we'll add you when alerting goes live.
Every basement flooding event on the Hudson Avenue corridor between 2020 and 2025 corresponds to a storm where peak hourly rainfall met or exceeded 0.8 inches per hour. No exceptions. No events below the threshold.
| Date | Storm | Daily Total | Peak Rate | NWS Warning |
|---|---|---|---|---|
| Jul 22, 2020 | Summer thunderstorm complex | 1.5–2.5″ | ~1.0–1.5″/hr | Yes |
| Jul 8, 2021 | TS Elsa remnants + thunderstorms | 2.0–4.7″ | ~1.5–2.0″/hr | Yes |
| Aug 21, 2021 | Tropical Storm Henri | 2.0–4.0″ | ~1.0–2.0″/hr | Yes |
| Sep 1, 2021 | Hurricane Ida remnants | 3.0–8.0+″ | 3.0+″/hr | Flash Flood Emergency |
| Sep 29, 2023 | TS Ophelia remnants + coastal low | 3.0–8.0+″ | 1.0–2.5″/hr | Yes |
| Dec 23, 2023 | Winter nor'easter | 2.0–3.5″ | ~0.8–1.2″/hr | Flood Advisory |
| Jul 14, 2025 | Severe thunderstorms | 1.5–2.3″ | 1.0–2.0″/hr | Yes — State of Emergency |
"The Office of Emergency Management noted that intense rainfall of greater than 0.8 inches per hour could result in flooding in low-lying areas." — Hoboken OEM, September 29, 2023 storm advisory
Hoboken OEM independently uses the same threshold — and shares the same combined sewer infrastructure (North Hudson Sewerage Authority) as our corridor. This is not a guess. It is the physical capacity limit of an aging combined sewer system.
The infrastructure has not changed since 2020. The physics has not changed. The storms are getting worse.
Stormwater and sanitary sewage share the same pipes along the Hudson County waterfront. When rain inflow exceeds capacity, the only relief valve is your basement floor drain.
Approximate physical capacity of the trunk sewer line serving Hudson Avenue. Above this rate, the hydraulic grade line rises above basement floor level and water enters through every low-point opening.
A warmer atmosphere holds about 4% more water per degree Fahrenheit. Cornell's 2021 study confirms NJ extreme rainfall is exceeding NOAA Atlas 14 predictions — the trend is accelerating.
NOAA Climate Prediction Center favors El Niño emerging by June–August 2026, increasing East Coast moisture transport. More fuel for the convective storms that already trip the threshold.
Six of seven documented events occurred between July and September. The flood season is predictable. Heightened alert from late June through early October is justified.
Every one of the 7 events had a corresponding NWS flash flood watch or warning issued in advance. The forecasting works. We just need it routed to the people who need it.
A 12–24 hour heads-up is enough to save thousands of dollars in property damage. Run this checklist when the threat level reads WATCH or WARNING.
Residents have raised the Woodcliff flooding issue with North Bergen Township since 2021. Below is a factual timeline drawn from email correspondence between residents, township officials, and the township's engineering firms. Names have been omitted; this is about the record, not individuals.
Five years of documented communication. Two declared "completed" infrastructure projects. The worst flooding year on record happened after those repairs (July 2025), under storms no larger than a typical summer thunderstorm. The township's own engineer recommended a parallel trunk line and a Hudson Avenue pump station in August 2025. As of the most recent town hall (March 26, 2026), neither has been funded, and the proposed solution was characterized as "not a 100% solution."
All quotations are drawn verbatim from email correspondence between residents and township officials. Names omitted intentionally.
Recurring flood damage is a legally recognized basis to appeal your property tax assessment in New Jersey. Done individually it saves each homeowner real money. Done collectively, it forces the township to choose: keep paying out reduced tax revenue every year, or finally fund the infrastructure fix. The math eventually makes the pump station look cheap.
File a property tax appeal with the Hudson County Board of Taxation. Repeat flooding is a documented physical defect that reduces market value. Most affected homeowners can win a 5–15% assessment reduction — typically $500–$3,000 a year in tax savings.
Evidence to include: photos of past flooding, repair invoices, insurance claim records, and a printed copy of this site's 5-year record showing the area's documented flood history.
Tradeoff to consider: a successful appeal lowers your taxes, but it also puts the flood-prone status on the public assessment record. Some homeowners weigh that against future resale or refinancing plans before filing.
Note: under NJ's 2024 Flood Disclosure Law, sellers must disclose flood history to buyers regardless of whether they appealed. The appeal mostly affects how visible the flood-prone status is to lenders, appraisers, and the public record — not whether you have to disclose.
Hudson County Board of Taxation →A neighborhood that files appeals together, with shared evidence, is generally harder for the assessor to dismiss. One coordinated evidence packet, one expert witness fee split among many homes, one consistent legal argument.
When multiple homes in the same corridor win reductions in the same year, it can lower the township's tax base — which is one of several factors that influence whether capital projects get funded.
Filing as a group does not guarantee success. Each appeal is decided on its own evidence, and the County Board of Taxation can rule in any direction. Strong individual evidence (photos, repair invoices, claim records) still matters most.
To be matched with neighbors filing in the same cycle, email nbfloodwatch@gmail.com with subject line “Group Tax Appeal”. We'll connect you with others on your block and share a starter evidence packet.
If enough properties in the corridor document repeat flood losses, the area can be designated a FEMA Repetitive Loss Area. That designation unlocks federal mitigation grant eligibility — specifically HMGP (Hazard Mitigation Grant Program) and FMA (Flood Mitigation Assistance) funds, which can pay for backflow valves, sewer separation, and pump station construction.
The threshold is documented loss claims, not opinion. Every flood report submitted to this site, every NFIP claim filed, and every FEMA Individual Assistance application strengthens the case.
FEMA mitigation grants →Email us with subject line “Tax Appeal Help” and we'll send a starter evidence packet, the Form A-1 PDF, and a one-page how-to written for non-lawyers.
Email nbfloodwatch@gmail.comUnder New Jersey's Flood Risk Notification Law (P.L. 2023, c. 93), every seller and landlord in the state is legally required to disclose known flood history and FEMA flood zone status to buyers and tenants — using the state's official disclosure form, before a contract or lease is signed.
Why this matters for the corridor: every disclosure filed for a Hudson Avenue home is now public-record evidence that this neighborhood floods.
This is general information, not legal or tax advice. For complex appeals or commercial properties, consult a New Jersey property tax attorney.
Did your home or street flood? Add it to the public record. Reports help validate the threshold model, push for funding, and build the resident-led dataset behind this site. Anonymous is fine.
Include whatever you can — even one or two of these is useful:
Names and contact info are never published. Reports are aggregated as anonymous data points.
On a phone, the button opens your default mail app. On a computer, just copy the address and email us from anywhere — Gmail, Outlook, your phone later.
Voluntarily reported by residents in the Woodcliff section. Not exhaustive — more homes are affected than listed. Specific addresses and names are kept private to protect residents.
Verified self-reports of repeated basement flooding from residents along the Woodcliff corridor.
Concentrated along the lowest-elevation block of the corridor where the trunk sewer line bottlenecks.
Storms since 2020 that crossed the 0.8″/hr threshold and produced reported basement flooding.
Resident-led recordkeeping cross-referenced with NWS, CoCoRaHS, and NJ State Climatologist data.
Affected resident? Reach out to be added to the documented list — anonymously is fine.