Helm Point tidal current predictions

Now

Flood 0.2 ktToward NNE (30°)

Next slack

Sat 1:06 AMAKDT

Next max flood

1.4 kt10:28 PM

Next max ebb

1.6 ktSat 4:53 AM

Knots along the channel: above the line the flood, running in toward NNE (30°); below it the ebb, running out toward SSW (210°). Times are Alaska Daylight Time. Today: slack 12:27 AM, ebb 1.5 kt 4:21 AM, slack 7:07 AM, flood 1.5 kt 10:12 AM, slack 12:56 PM, ebb 1.5 kt 4:42 PM, slack 7:27 PM, flood 1.4 kt 10:28 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 with gusts up to 35 kt and seas 6 to 8 ft expected. * WHERE...Clarence Strait. * WHEN...From 10 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 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...NW wind 10 kt becoming SE late. Seas 2 ft or less. .SAT...SE wind 25 kt. Seas 5 ft building to 8 ft in the afternoon. Rain. .SAT NIGHT...SE wind 25 kt. Seas 6 ft. Rain. .SUN...SE wind 30 kt. Seas 9 ft. Rain. .SUN NIGHT...SE gale to 35 kt. Seas 12 ft. Rain. .MON...SE wind 30 kt. Seas 11 ft. .TUE...S wind 20 kt. Seas 6 ft. .WED...S wind 25 kt. Seas 6 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. 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.

• Guard Islands, 2 miles northwest ofSubordinate current station9.6 mi
• Guard Islands, 2 miles west ofSubordinate current station11 mi
• Guard Island Lighthouse, 5.1 miles SW ofSubordinate current station15 mi
• Ship IslandSubordinate current station16 mi
• Grindall Island, south ofHarmonic current station17 mi
• east of the airportHarmonic current station18 mi
• KetchikanSubordinate current station20 mi
• Happy Harbor, Kasaan Island, Kasaan BayHarmonic current station20 mi

• Tide times at Loring, Naha Bay 7.9 mi
• Tide times at Vallenar Point 12 mi
• Tide times at Ward Cove 15 mi
• Forecast for Ketchikan, 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 PCT2941, bin 1: original at NOAA. Marine alerts from the National Weather Service.