Weather Routing / Custom Weather Forecasts

Weather Routing For The Bayview & Chicago Macs

If you unfamiliar with marine weather forecasting, creating a forecast for the Bayview or Chicago Mac can be challenging and time-consuming. A custom forecast from LakeErieWX reduces this burden and allows you to focus on your race strategy and address the last-minute issues that crop up the day before the race.

A custom forecast package from LakeErieWX includes the following:

  • Custom Forecast: A multi-page Custom Forecast in PDF format will be sent by email early Friday evening. In addition to a detailed discussion and forecast graphics showing the expected weather conditions, the document includes:
    • The location and movement of areas of high and low pressure.
    • 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.
    • Detailed wind speed, wind direction, gust speed, and wave height forecast at 3-hour intervals.
    • A computer-generated routing solution based on the wind forecast and your yacht’s unique performance characteristics (polars required).
  • Text-Only Forecast: In addition to the detailed graphical version of the Custom Forecast, a text-only version of the forecast will be sent to you via email.
  • Consultations: Your questions regarding the forecast will be answered via email, text message, or by telephone.
  • Marine Weather Forecasting Guide: You will receive a copy of the LakeErieWX Marine Weather Forecasting Guide that decodes the confusing symbols and shorthand included on weather forecast graphics.

A custom forecast package for either Mac covering Saturday, Sunday and Monday is only $225. Custom forecasts for those participating in the Chicago-Mac Cruising Division are also $225 and cover Friday afternoon through Monday morning.

Sample LakeErieWX Custom Forecast
Please click here to view a sample Custom Forecast.

Limited Availability
Creating a custom forecast is time-consuming--only five customers will be accepted for each Mac. Please contact me at to sign up for this year's race.

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 employed as the Vice-President of Administration for the law firm of Wegman, Hessler & Vanderburg, and 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

Now scheduling for 2018/2019

October 8-9, 2018
Marine Weather Forecasting-Two Day Masters Class
Cruisers University-Annapolis Boat Shows
Annapolis, Maryland
Click here to register at Cruisers University.
Click here for the seminar outline.

Click Here For Full 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 Reviews