SEA NEAR CHESAPEAKE BAY BRIDGE TUNNEL © TIDES4FISHING | WEATHER FORECAST FOR CHESAPEAKE BAY BRIDGE TUNNEL | AUGUST 11, 2020© TIDES4FISHING | ULTRAVIOLET INDEX IN CHESAPEAKE BAY BRIDGE TUNNEL | AUGUST 11, 2020
Oceanographers will tell you that while it’s possible to predict the time of high and low water with precision, accurately predicting currents is far more difficult. Even as the water level in the ocean begins to recede (the dam begins to lower), the ocean is still higher than the Bay so the Bay currents continue to flood and the water level continues to rise in the Bay for another three hours. Buddy’s crabcakes would have to wait. Meanwhile the tide wave was moving north at 15 miles an hour, so being 30 miles up the Bay, you would still have two more hours of rising tide; essentially you are in the six-hour rising tidal cycle for a total of eight hours. Looking at a tide chart of the Chesapeake, you will see that when it is high tide at the mouth of the Bay, it is low tide near Solomons and high tide near Baltimore. Weather Forecasts for the Chesapeake Bay The bulge translates into a 2.5-foot wave (very low amplitude) and a 5,000-mile wave length (very long). How do tides form? The graph at the top shows low water (measured in feet) at approximately 2 a.m. At the same time, the current graph on the bottom shows current ebbing at a little more than 1 knot (the negative speed indicates the reverse direction). But, remember that the tide crest has been moving north too. On the opposite side of the earth where the gravitational force is less, inertia from the earth’s spin causes the water to bulge outward.
An hour later we were still up against more than half a knot of current. The tidal crest moves up the Bay on a six-hour cycle, the continuation of the ocean’s low amplitude wave now slowed to 15 miles an hour.If you leave Hampton Roads at mean low tide and head up the Bay at 5 knots, the high tide crest will eventually catch up with you. Unfortunately on that late August afternoon as I rounded the tip of Blackwalnut Point, I was headed into the ebb current portion of the cycle, which was also moving up the Bay at 15 knots with its current running against me. This is important to understand as it also explains how the currents on the Bay will affect your boat.The vertical tidal period at any location on the Bay is approximately six hours up and six hours down. Today we can see the moonset on the horizon at 288° west at When the solunar period coincides with sunrise or sunset, we can expect more activity than initially planned.
NOAA, National Ocean Service Slack Water Maximum Current Slack Water The tide is just starting to rise as you head north. For instance in the lower Bay the flood tide starts earlier and runs stronger along the Eastern Shore, which may be due to the Coriolis Effect. A tide table is handy if you want to know the depth of water in an anchorage. Then scroll to the bottom of this page.
The movement up is caused by the moon’s gravitational pull as the ocean’s surface passes below it. Chesapeake currents are tricky to read, but understanding how tides affect the massive amount of Bay water heading downstream can help boaters time their passages to go with the flow.One late August years ago and nearing the end of a week’s cruise, we departed Oxford, Md., aboard our Tartan 30, We had a moderate northwesterly breeze, and by the time we cleared the point it would be low tide. As a general rule if you enter the Potomac at the start of the flood, you will carry a favorable current upstream for more than six hours. Enjoy to the max a well-planned fishing expedition in Chesapeake Bay Bridge Tunnel The most frequent wave height will be about half the height of the significant wave. The waves you will find on the shore can be slightly affected by the orientation of the coastline and the seabed of the beaches, although in most cases they are usually equivalent.Remember that you can check the tides at your fishing point from your smartphone with the
Station Home Page ; Data Inventory; Tides/Water Levels. Note that the dark horizontal midline on the current graph shows 0 speed, when the current is slack. Our prediction algorithm for water temperature is in development phase. It is not at all unusual for this to cause an ebb current that runs for more than 18 hours as the Bay drains all that excess water. “Current” is the horizontal movement of the water. High tide may only slow it down rather than completely reverse it.There are other idiosyncrasies related to Bay currents.
In this context, “tide” refers only to the height of the water.
SURF FORECAST IN CHESAPEAKE BAY BRIDGE TUNNEL © TIDES4FISHING | SWELL FORECAST IN CHESAPEAKE BAY BRIDGE TUNNEL | AUGUST 11, 2020
This means at this moment you need to be prepared for a wave of
Disclaimer: The Chesapeake Bay Operational Forecast System (CBOFS) has been implemented by NOAA's National Ocean Service (NOS) to provide the maritime user community with short-term predictions of water levels, water currents, water temperatures and salinity of the Chesapeake Bay. On the Bay, not so much.
When we speak of a flood tide we are really talking about current flowing into the Bay and should say “flood current.” Ebb current is when the water is flowing out of the Bay.As the ocean bulge reaches the continental shelf, friction in the shallow water begins to slow it down. The shape and depth of the shoreline significantly influences the height of the tide at any given point. In a low amplitude wave the water molecules only move up and down; although the wave is moving laterally across the ocean’s surface the water molecules remain in the same place. To give you an idea of the range of waves to expect at a given time, we consider the
Slack current (where the time line crosses the 0 speed line) is at 5:30 a.m., more than three hours after low water, when the tidal height has already begun to rise by nearly half a foot. The tidal bulge raises and lowers the ship but doesn’t change its speed.)
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