Grants Tomb tidal current predictions

Now

Ebb 1.2 ktToward SSW (208°)

Next slack

5:34 AMEDT

Next max flood

2.0 kt8:21 AM

Next max ebb

2.0 kt2:23 AM

Knots along the channel: above the line the flood, running in toward NNE (25°); below it the ebb, running out toward SSW (208°). Times are Eastern Daylight Time. Today: ebb 2.0 kt 2:23 AM, slack 5:34 AM, flood 2.0 kt 8:21 AM, slack 11:59 AM, ebb 2.0 kt 2:42 PM, slack 5:52 PM, flood 2.1 kt 8:37 PM.

• Coastal Flood Warning Coastal Flood Warning issued September 25 at 4:44PM EDT until September 27 at 6:00PM EDT by NWS Upton NYUntil Sun 6:00 PM
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  * WHAT...1 to 2 ft of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. The highest water levels are likely with the Saturday morning and possibly Sunday morning high tides. * WHERE...In New Jersey, Hudson, Eastern Bergen, Eastern Essex and Eastern Union Counties. In New York, New York (Manhattan) County. * WHEN...During the times of high tide until 6 PM EDT Sunday. * IMPACTS...Minor to moderate flooding is expected in the most vulnerable locations near the waterfront and shoreline. Expect around 1 to 2 feet of inundation above ground level in low lying, vulnerable areas. Some roads and low lying property including parking lots, parks, lawns and homes/businesses with basements near the waterfront will experience shallow flooding. * ADDITIONAL DETAILS...Another round of minor to moderate coastal flooding is possible for the Sunday morning high tide cycle.

  Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth.

• Coastal Flood Advisory The Coastal Flood Advisory has been replaced. Please see the latest information from NWS Upton NY on this developing situation.Until Sun 6:00 PM
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  The Coastal Flood Advisory has been replaced. Please see the latest information from NWS Upton NY on this developing situation.

  Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth.

The flood is the tidal current running in from the sea, the ebb the current running back out. Slack water is the short turn between them, when the current is weakest: the time to cross a strong channel, anchor, or dive. Slack in a channel is not the time of high or low tide; it can come hours after.

Speeds are knots along the channel's main axis, and directions are degrees true toward which the water flows, as NOAA prints its tables. A current against the wind stands the waves up steep and close together.

Predictions are astronomical: the moon and the sun, not the weather. Strong wind, river flow after heavy rain and storm surge all change the real current. This is a subordinate station: NOAA predicts it from a nearby harmonic station by fixed corrections to the times and speeds of its slack waters and maxima, so the curve between them is less exact.

• Madison Ave. BridgeSubordinate current station1.7 mi
• Willis Ave. Bridge, 0.1 mile NW ofSubordinate current station2.0 mi
• Harlem River, south endHarmonic current station2.2 mi
• Macombs Dam BridgeSubordinate current station2.2 mi
• Hell GateHarmonic current station2.6 mi
• High BridgeSubordinate current station3.0 mi
• Roosevelt Is., west of, off 75th StreetSubordinate current station3.0 mi
• George Washington BridgeHarmonic current station3.0 mi

• Tide times at Edgewater 0.7 mi
• Tide times at Harlem River, Randalls Island 2.1 mi
• Tide times at Horns Hook, East 90th Street 2.6 mi
• Forecast for Morningside Heights, NY
• Open the live map with tidal currents
• All tidal current stations in New Jersey

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station ACT3656, bin 1: original at NOAA. Marine alerts from the National Weather Service.