Hallowing Point tidal current predictions

Now

Ebb 0.4 ktToward SSE (149°)

Next slack

2:57 AMEDT

Next max flood

1.1 kt5:38 AM

Next max ebb

1.1 kt11:29 AM

Knots along the channel: above the line the flood, running in toward NNW (345°); below it the ebb, running out toward SSE (149°). Times are Eastern Daylight Time. Today: slack 2:57 AM, flood 1.1 kt 5:38 AM, slack 8:17 AM, ebb 1.1 kt 11:29 AM, slack 2:54 PM, flood 1.3 kt 5:53 PM, slack 8:48 PM.

• Small Craft Advisory Small Craft Advisory issued September 25 at 5:55PM EDT until September 26 at 6:00PM EDT by NWS Baltimore MD/Washington DCUntil 6:00 PM
  Full text

  * WHAT...North winds 15 to 20 kt with gusts up to 30 kt. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD, Chesapeake Bay north of Pooles Island MD, and Patapsco River including Baltimore Harbor. * WHEN...Until 6 PM EDT Saturday. * IMPACTS...Conditions will be hazardous to small craft.

  Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

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.

• Freestone Point, 2.3 miles east ofSubordinate current station5.1 mi
• Jones Point, AlexandriaSubordinate current station11 mi
• QuanticoSubordinate current station12 mi
• Quantico Creek entranceSubordinate current station12 mi
• Hains PointSubordinate current station15 mi
• Persimmon PointSubordinate current station21 mi
• Maryland PointSubordinate current station21 mi
• Potomac River Bridge, 0.4 mile south ofSubordinate current station21 mi

• Tide times at Marshall Hall 3.2 mi
• Tide times at Indian Head 4.3 mi
• Tide times at Alexandria 12 mi
• Forecast for Potomac Heights, MD
• Open the live map with tidal currents
• All tidal current stations in Maryland

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station ACT5896, bin 1: original at NOAA. Marine alerts from the National Weather Service.