Tonowek Narrows tidal current predictions

Now

Flood 0.7 ktToward NE (37°)

Next slack

Sat 12:01 AMAKDT

Next max flood

3.1 kt8:31 PM

Next max ebb

2.9 ktSat 2:44 AM

Knots along the channel: above the line the flood, running in toward NE (37°); below it the ebb, running out toward SW (224°). Times are Alaska Daylight Time. Today: ebb 2.8 kt 2:07 AM, slack 5:33 AM, flood 3.0 kt 8:21 AM, slack 11:49 AM, ebb 2.8 kt 2:32 PM, slack 5:50 PM, flood 3.1 kt 8:31 PM.

• Small Craft Advisory Small Craft Advisory issued September 25 at 3:40PM AKDT until September 26 at 6:00PM AKDT by NWS Juneau AKUntil Sat 6:00 PM
  Full text

  * WHAT...Southeast winds 20 to 30 kt and seas 7 to 10 ft expected. * WHERE...Yakutat Bay, Dixon Entrance to Cape Decision out to 15 NM, Cape Decision to Cape Edgecumbe out to 15 NM and Cape Edgecumbe to Cape Spencer out to 15 NM. * WHEN...From 7 AM to 6 PM AKDT Saturday. * 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 25 at 3:33PM AKDT until September 26 at 5:00PM AKDT by NWS Juneau AKUntil Sat 5:00 PM
  Full text

  Southeast Alaska Coastal Waters from Dixon Entrance to Cape Suckling out 100 NM Wind forecasts reflect the predominant speed and direction expected. Seas forecasts represent the average of the highest one-third of the combined windwave and swell height. .TONIGHT...W wind 10 kt becoming S 20 kt late. Seas 5 ft. .SAT...S wind 25 kt. Seas 9 ft. Rain in the morning. .SAT NIGHT...S wind 20 kt. Seas 8 ft. Rain late. .SUN...S wind 25 kt. Seas 10 ft. Rain. .SUN NIGHT...S wind 30 kt. Seas 11 ft. Showers. .MON...S wind 15 kt. Seas 10 ft. .TUE...SW wind 15 kt. Seas 9 ft. .WED...S wind 15 kt. Seas 9 ft.

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.

• Karheen Passage, west of Cob IslandHarmonic current station2.8 mi
• Sea Otter SoundHarmonic current station9.0 mi
• Tuxekan Passage, 0.2 mile S of TuxekanSubordinate current station9.3 mi
• South entranceHarmonic current station9.6 mi
• Tuxekan Passage, north of Kutegi PointHarmonic current station11 mi
• Boca de FinasHarmonic current station11 mi
• Skookumchuck PassSubordinate current station11 mi
• San Christoval Chanel, Larz Lt., 0.25nm N ofHarmonic current station12 mi

• Tide times at Nossuk Bay, Tonowek Bay 2.7 mi
• Tide times at Tuxekan, 0.5 mile south of 9.3 mi
• Tide times at Port Alice, Heceta Island 11 mi
• Forecast for Klawock, 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 SEA0630, bin 30: original at NOAA. Marine alerts from the National Weather Service.