Marine Weather Presentations

One-hour marine weather topics for boat shows, racing clinics, awards banquets, or annual meetings.

Thunderstorms: A Primer for Coastal and Inland Boaters

Thunderstorms can quickly spoil an outing in many ways—strong winds, large waves, dangerous lightning or visibility-limiting rain. This presentation will examine the various types of thunderstorms and the atmo­spheric ingredients that lead to their formation.

Learn why thunderstorms often ‘pop-up’ late on summer afternoons and why some storms have short life-spans while others persist for hours. Discover why thunderstorms remain independent on some days and form into damaging long-lived squall lines on others. Learn to rec­ognize the conditions that spawn waterspouts and why they peak in the fall. Reduce your chances of a hair-raising or wind-swept encounter with a thunderstorm by learning to assess the potential for their develop­ment using readily available Internet resources and the sky.

Download the flyer describing the presentation.

Doppler Weather Radar: A Boater's Best Friend

Doppler weather radar from the National Weather Service network has a lot to offer the weather-savvy boater. This presentation will introduce and examine the common and lesser known types of Doppler radar imagery and provide instruction in its interpretation and use.

In addition to learning how weather radar works (along with a few of its quirks), you will learn how to use it to monitor the development, intensity, and speed of approaching thunderstorms. Doppler radar can also be helpful in judging the potential for damaging thunderstorm wind gusts. The presentation will introduce sources for Doppler weather radar such as the Internet, pc-based software and smartphone applications.

Download the flyer describing the presentation.

Weather Makers: Understanding Low Pressure Systems

Low pressure system have a long association with bad weather, and their passage often produces strong, gusty and shifty winds; steep waves; damaging thunderstorms; and abrupt temperature changes. This presentation will introduce and examine the features that comprise low pressure systems such as stationary fronts, cold fronts, warm fronts, and occluded fronts.

Learn what type of wind and weather to expect from each sector of the system. The presentation will also review the online forecasting graphics that predict the formation, transition and movement of these weather makers.

Download the flyer describing the presentation.

About The Speaker

Mark Thornton has been sailing on Lake Erie for more than 20 years and currently owns Osprey, a C&C 35. His interest in weather forecasting grew from his experiences cruising and racing on the lake. 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 ( He served as race meteorologist for the 2014-2016 Bell’s Beer Bayview Race to Mackinac, and is the past president of the Cleveland chapter of the American Meteorological Society. 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.

Phone: 440.250.9179

Upcoming Seminars/Presentations

Now scheduling for 2016/2017


Friday, April 29, 2017
Marine Weather Forecasting
(seminar outline)
Cruisers University/Annapolis Boat Shows
Annapolis, MD

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