Weather drives every voyage departure decision we make.   We discovered that many boaters are unaware of the weather tools available to the general public for free or a minimal subscription pricing.    We educate and inform boaters – that are interested, on the sites we use and how to read the information.  It isn’t difficult to understand, but a little insight goes a long way into understanding how the information can be of use.

To be certain, our selected sites, are a few among many.  However, we have had success and have confidence – in general, with the information produced.  It is as good as is possible considering the nature of weather.  The best scenario is that as potentially good weather draws near, the different weather services agree.  It doesn’t always happen that way.

A good example was  Spring 2010, when we were planning our departure of the Columbia River, headed toward our summer cruising grounds north.  None of the services agreed, with forecasts from excellent to “no-go”.  Okay, fine.  Which one do we trust?  We went – the bar was no problem, but the ocean was a mess with very disorganized waves which created a washing machine effect.  We turned around, went back across the bar and waited one day.  The next day was great.

Another contradictory example was the fall of 2011.  We were in Cabo San Lucas and planned to cross the Sea of Cortez.  That morning we downloaded all our favorite weather sites.  All of them agreed it would be flat with no wind. We had time to make it into Banderas Bay before weather set in.  On that occasion it was never flat – even on departure.  It built throughout the day and stayed up until morning the next day.  We changed course to keep the weather on our stern.  Landing in Mazatlan, instead of Banderas Bay.

Buoy Weather

We subscribe to Buoy Weather.   You can view it at no charge – two days at a time.  We pay for the service and get a 7 day forecast.  You can create virtual buoys, anywhere in the world, and get a forecast based on the location.  They offer email updates, if desired.

I think it will become obvious, when you look at the report, that we not going  anytime soon – as in the coming week.

Marine Forecast for 46.25º N / 124.25º W

“Astoria” Conditions suitable for most marine activities Caution. Small craft advisory Hazardous conditions. Use extreme caution 7 Day Marine Forecast Model Cycle 2010 APR 24 06Z Time Zone: GMT – 7 Hours Saturday 4/24 Morning Breezy whitecapping conditions with moderate choppy seas. Large long period swell. Winds: WSW 14 to 19 knots Seas: WNW 13 feet at 13 sec. Afternoon Breezy whitecapping conditions with moderate choppy seas. Very large long period swell. Winds: WSW 11 to 15 knots Seas: W 15 feet at 13 sec. Sunday 4/25 Morning Light winds with a slight chop. Large long period swell. Winds: SE 6 to 8 knots Seas: WNW 10 feet at 12 sec. Afternoon Light and variable winds with smooth seas. Moderate long period swell. Winds: SW 2 to 3 knots Seas: W 8 feet at 11 sec. Monday 4/26 Morning Gale warning with dangerous seas. Small craft advisory. Use extreme caution. Moderate long period swell. Winds: SSE 26 to 35 knots Seas: W 8 feet at 12 sec. Afternoon Very windy with large choppy seas. Small craft advisory. Large long period swell. Winds: S 24 to 32 knots Seas: WSW 15 feet at 11 sec. Tuesday 4/27 Morning Breezy whitecapping conditions with moderate choppy seas. Large long period swell. Winds: SW 14 to 19 knots Seas: WSW 12 feet at 10 sec. Afternoon Breezy whitecapping conditions with moderate choppy seas. Large long period swell. Winds: WSW 13 to 18 knots Seas: WSW 12 feet at 10 sec. Wednesday 4/28 Morning Breezy whitecapping conditions with moderate choppy seas. Large long period swell. Winds: WSW 11 to 14 knots Seas: W 13 feet at 13 sec. Afternoon Breezy whitecapping conditions with moderate choppy seas. Large long period swell. Winds: WNW 13 to 17 knots Seas: W 14 feet at 12 sec. Thursday 4/29 Morning Breezy whitecapping conditions with moderate choppy seas. Large long period swell. Winds: SW 12 to 16 knots Seas: W 11 feet at 11 sec. Afternoon Windy conditions with choppy seas. Small craft advisory. Large long period swell. Winds: SSW 19 to 26 knots Seas: W 10 feet at 11 sec. Wind & Wave Forecast Sat 24 5am Sat 24 11am Sat 24 5pm Sat 24 11pm Sun 25 5am Sun 25 11am Sun 25 5pm Sun 25 11pm Mon 26 5am Mon 26 11am Mon 26 5pm Mon 26 11pm Tue 27 5am Tue 27 11am Tue 27 5pm Tue 27 11pm Wed 28 5am Wed 28 11am Wed 28 5pm Wed 28 11pm Thu 29 5am Thu 29 11am Thu 29 5pm Thu 29 11pm Fri 30 5am Fri 30 11am Fri 30 5pm Fri 30 11pm 18 13 19 14 15 11 8 6 7 5 8 6 3 2 10 7 22 16 35 26 32 24 20 15 19 14 19 14 18 13 19 14 18 13 14 11 17 13 15 11 12 9 16 12 26 19 23 17 20 15 22 16 19 14 15 11 WSW WSW WSW WSW SE SE SW SSW SSE SSE S SSW WSW SW WSW SW WSW WSW WNW WNW W SW SSW WNW WNW WNW WNW NW 12 9.4 17 13 20 15 18 14 16 12 13 10 11 8.3 7.8 6 6 4.6 9.9 7.6 19 15 19 15 17 13 16 12 15 12 15 11 15 12 17 13 18 14 17 13 16 12 14 11 13 10 13 9.9 12 9.3 16 12 21 16 20 15 14 13 13 13 12 12 11 11 11 12 11 11 11 10 10 11 11 13 12 12 12 11 11 11 10 10 14 13 WNW WNW W WNW W WNW W W W W WSW WSW WSW WSW WSW WSW WSW W W W W W W WNW WNW WNW WNW WNW

I like this service because it is very visual and easy to understand.  It becomes very clear if it is a “Go” , or “No Go”  day.

National Weather Service – NOAA Marine Forecast

This link at NWS Marine Forecast gives a text description of the forecast.

US Navy Mil Weather – Unclassified

This public site  US Navy site – FNMOC WXMAP gives data up to 180 hours out.

Choose from the top section “Global Models”/East Pacific/NGP.

Select “FNMOC Wave Watch 3 Sig Wave Heights..”,

then “Loop” at the end of the row.

There is no loop until all the time periods are green dotted out to 180 hours.    It runs in a very colorful loop over the 180 hour period.  Both wind and wave heights are displayed.   This is the tool we use to get our hopes up, as it shows potential good weather the furthest time out.   However, much can happen between now and 180 hours in the future.  It still gives us our best look at potential “go” conditions.  Black is best and the darker blues are very nice – though we might entertain conditions in the lighter blue colors, depending on wind and how long the conditions are forecast to last.

NOAA Marine Radiofax

Weather Radiofax Charts. This is the same information that is transmitted via high frequency out at sea – many boats receive this information via a HF Radiofax Machine.  We pull our information from the Point Reyes site for the west coast. Bruce looks at the Wind/Wave and Surface charts. When we are south of the American border he uses the Tropical Analysis. You can pull information from current time out to 96 hours. Choose the GIF option.

Passage Weather

[Added in 2010] Passage Weather.  This option can be viewed through a loop also.  You get Wave Height, Wind direction, and Pressure.  All these can be downloaded and saved for future reference.  *This was our favored tool while crossing the Sea of Cortez in 2010/11.  It helped having the details to available for review later when we had no internet connectivity.

Real Time Buoy Conditions

There are websites that give real-time  information from ocean buoys.   You can call the NDBC buoy – by phone, for current conditions, or go online.  This is a good way to see if what the forecasters is saying is happening – is really happening.  So, for instance,when underway we checked the buoys up ahead of us to see if the conditions were as forecast.  One other site is Combined Current/Wave Buoy Conditions and gives a visual quick look.

As I mentioned earlier, that are many more sites than the ones we use.  We have boating friends that use other services and find they fit their needs.  The important thing is get the information, then make your voyaging plan.

Be safe and enjoy the voyage!