Weather Routing / Custom Weather Forecasts

Weather Routing For The Bell's Beer Bayview Mackinac Race

A Custom Forecast Package from LakeErieWX includes:

  • Marine Weather Forecasting Guide: You will receive a copy of the LakeErieWX Marine Weather Forecasting Guide designed to decode the confusing symbols and shorthand included on weather forecast graphics.
  • Preliminary Briefings: A detailed written discussion of the large-scale weather pattern and the potential for severe weather during the forecast period. The preliminary briefings also include a written wind and wave forecast. Preliminary briefings are sent via email on the two days preceding the delivery of your Custom Forecast.
  • Custom Forecast With Routing: A multi-page Custom Forecast will be sent to you in PDF format the evening prior to your race or cruise departure. The forecast will include the following:
    • A detailed discussion and supporting forecast graphics showing the expected weather conditions including:
      • The location and movement of high and low pressure systems.
      • The passage of cold fronts, warm fronts, stationary fronts, and troughs, including the anticipated impact on the wind.
      • The potential for thunderstorms and organized severe weather including when, where, and what type of storms are expected.
      • A detailed wind speed, wind direction, gust speed, and wave height forecast at 3-hour intervals.
    • A computer-generated routing solution based on the preferred wind forecast and your yacht’s unique performance characteristics (your boat’s polar data is required).
  • Text-Only Forecast: In addition to the detailed graphical version of the Custom Forecast described above, a text-only version including the forecast discussion and marine forecast will be sent to you via email.
  • Consultations: Your questions regarding the forecast will be answered via email or telephone.

Click on the image below (or here) to review a sample Custom Forecast. Click here for a sample Preliminary Briefing.


A custom forecast package for the Bayview Mack covering Saturday, Sunday and Monday is only $225. A forecast package which excludes custom routing but includes all of the other products listed above is available for $119.00.

Limited Availability
Creating a custom forecast is time-consuming, therefore a limited number of customers are accepted for each event. Please contact me at to sign up before spaces are filled.

Mark Thornton

Mark Thornton has been sailing for more than 25 years and currently owns Osprey, a C&C 35. His interest in weather forecasting grew from his experiences cruising and racing on the Great Lakes. Mark is a 2006 graduate of the Penn State University Certificate of Achievement in Weather Forecasting, a two-year program that develops skills in general, tropical, and severe weather forecasting.

He is the president of LakeErieWX LLC, a company dedicated to providing marine weather education and forecasting resources for recreational boaters ( Mark publishes a marine weather blog and teaches basic forecasting seminars to recreational boaters during the off-season. He has served as the Race Meteorologist for the Bell’s Beer Bayview Race to Mackinac since 2014. Mark is also employed as a Teaching Assistant in the Certificate of Achievement in Weather Forecasting Program at Penn State University.

As both a sailor and a meteorologist, I am uniquely qualified to improve the weather-related skills of your members. Please contact me by email or call 440-250-9179 to learn how a weather forecasting seminar can help address your organization's educational, safety, and membership goals.

Click here to view my meteorological resume or here to read about my marine weather forecasting seminars and workshops.

Interested in reading and learning more about marine weather? A few times each year, I publish an article on an interesting marine weather event. Click here to subscribe to my 'no spam' email distribution list.

Phone: 440.250.9179

Upcoming Seminars & Presentations

Now scheduling for 2018/2019

April 27 & 28, 2019
Marine Weather Forecasting - Two Day Masters Class
Cruisers University-Annapolis Boat Shows
Annapolis, Maryland
Click here to register at Cruisers University.
Click here for additional information on the seminar.

Click here for the complete seminar schedule.

Seminar Reviews
"You have a passion for meteorology that is contagious and a gift for communicating a complex subject." -- Steve H.

Click here for more testimonials.