Riverdale tidal current predictions

Now

Flood 1.0 ktToward NNE (15°)

Next slack

11:41 PMEDT

Next max flood

1.6 ktSat 9:10 AM

Next max ebb

2.3 ktSat 3:28 AM

Knots along the channel: above the line the flood, running in toward NNE (15°); below it the ebb, running out toward SSW (200°). Times are Eastern Daylight Time. Today: ebb 2.3 kt 2:52 AM, slack 6:10 AM, flood 1.5 kt 8:49 AM, slack 11:26 AM, ebb 2.0 kt 3:09 PM, slack 6:14 PM, flood 1.6 kt 8:54 PM, slack 11:41 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
  Full text

  * WHAT...1 to 2 ft, locally 2 1/2 ft, of inundation above ground level expected in vulnerable areas near the waterfront and shoreline. The highest water levels are likely with the Saturday midday and possibly Sunday midday high tides. * WHERE...Bronx, Northwest Suffolk, Northern Queens and Northern Nassau Counties. * WHEN...During the times of high tide until 6 PM EDT Sunday. * COASTAL IMPACTS...Minor to locally moderate flooding is expected in the most vulnerable locations near the waterfront and shoreline. Expect 1 to 2 ft, locally 2 1/2 ft, 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. * SHOREFRONT/BEACH IMPACTS...Breaking waves of 3 to 6 ft, along with elevated water levels, will result in areas of dune erosion with damage to a few waterfront structures possible. Splashover over seawalls and overwashes where dune structures are compromised may locally exacerbate flooding of roadways and vulnerable structures behind protective dunes. * ADDITIONAL DETAILS...Another round of minor to moderate coastal flooding is possible for the Sunday afternoon 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.

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.

• Mount St. Vincent College, SW ofSubordinate current station0.7 mi
• Henry Hudson Bridge, 0.7 nmi. SE ofSubordinate current station1.6 mi
• Spuyten DuyvilHarmonic current station1.7 mi
• Broadway BridgeSubordinate current station1.9 mi
• West 207th Street BridgeSubordinate current station2.5 mi
• George Washington BridgeHarmonic current station3.9 mi
• High BridgeSubordinate current station4.1 mi
• Macombs Dam BridgeSubordinate current station5.0 mi

• Tide times at Riverdale 0.2 mi
• Tide times at Spuyten Duyvil Creek ent 1.6 mi
• Tide times at Dyckman Street, Ferry Slip 2.4 mi
• Forecast for Riverdale, NY
• Open the live map with tidal currents
• All tidal current stations in New York

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station ACT3671, bin 1: original at NOAA. Marine alerts from the National Weather Service.