Vichnefski Rock Light tidal current predictions

Now

Ebb 2.7 ktToward SW (226°)

Next slack

8:01 PMAKDT

Next max flood

2.7 kt11:02 PM

Next max ebb

3.0 kt4:43 PM

Knots along the channel: above the line the flood, running in toward NE (50°); below it the ebb, running out toward SW (226°). Times are Alaska Daylight Time. Today: slack 1:19 AM, ebb 2.8 kt 4:24 AM, slack 7:34 AM, flood 2.5 kt 10:35 AM, slack 1:26 PM, ebb 3.0 kt 4:43 PM, slack 8:01 PM, flood 2.7 kt 11:02 PM.

• Small Craft Advisory Small Craft Advisory issued September 27 at 8:32AM AKDT until September 27 at 10:00PM AKDT by NWS Juneau AKUntil 10:00 PM
  Full text

  * WHAT...South winds 25 to 35 kt and seas 7 to 10 ft expected. * WHERE...Sumner Strait. * WHEN...Until 10 PM AKDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

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

• Small Craft Advisory Small Craft Advisory issued September 26 at 3:27PM AKDT until September 27 at 5:00PM AKDT by NWS Juneau AKUntil 5:00 PM
  Full text

  Southeast Alaska Inside Waters from Dixon Entrance to Skagway Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent the average of the highest one-third of the combined windwave and swell height. .TONIGHT...SE wind 20 kt. Seas 4 ft, except 6 ft near ocean entrances. Rain late. .SUN...S wind 25 kt. Seas 5 ft, except 9 ft near ocean entrances. Rain. .SUN NIGHT...S wind 25 kt diminishing to 10 kt late. Seas 6 ft, except 8 ft near ocean entrances. Rain. .MON...S wind 10 kt. Seas 3 ft, except 6 ft near ocean entrances. Rain. .MON NIGHT...SE wind 15 kt. Seas 3 ft, except 6 ft near ocean entrances. Showers. .TUE...SE wind 15 kt. Seas 3 ft. .WED...SE wind 15 kt. Seas 3 ft. .THU...S wind 10 kt. Seas 2 ft or less.

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.

• Point AlexanderSubordinate current station5.0 mi
• Point DeceptionSubordinate current station6.4 mi
• Point LockwoodSubordinate current station7.9 mi
• Round Island LightHarmonic current station9.5 mi
• The Eye OpenerHarmonic current station9.9 mi
• Snow Passage, north entranceSubordinate current station10 mi
• Spike RockSubordinate current station11 mi
• Snow Passage NarrowsHarmonic current station12 mi

• Tide times at Point Lockwood, Woewodski Island 8.1 mi
• Tide times at Beecher Pass 10 mi
• Tide times at Bushy Island, Snow Passage 12 mi
• Forecast for Wrangell, AK
• Open the live map with tidal currents
• All tidal current stations in Alaska

Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station SEA0405, bin 27: original at NOAA. Marine alerts from the National Weather Service.