Date(s) - 06/02/2014 - 17/03/2014
Category(ies) No Categories
- Sailing will be instructed by Rod Pickles on Thursday evenings.
- Proposed start date is Feb. 6th. The price will be $160.
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One of the highlights of last week's Basic Weather and Forecasting Seminar was when Cliff lead us through decoding a Surface Weather Map.
We chose the most recent map from this URL
Then used the codes on this URL to lear about surface observations on cloud type, wide sped and direction, atmospheric pressure, observed weather (there are 99 different codes here) and changes in atmospheric pressure.
This week students in our Basic Weather and Forecasting Seminar will have an extra treat. Mike McKendy has volunteered to to a 15 minute presentation on "How a cruiser finds out about and keeps on top of weather conditions”.
Yet another example of how the Canadian Power and Sail Squadron is all about boaters helping boaters be safer boaters.
As always Cliff continues to work at delver in the best course possible over such a short period of time and here is this week’s updated list of weather sites. See the attached. Thanks Cliff
Fredericton Power and Sail Squadron
Course: Basic Weather and Forecasting Seminar
Instructor: Clifford Cull
Weather web sites - (with additions)
Environment Canada: www.weather.ec.gc.ca
US National Weather Service: www.nws.noaa.gov
European Weather Prediction: http://www.ecmwf.int/
NWS graphical forecasts: http://graphical.weather.gov/
Montreal Weather Service (weather/forecasting tools): http://meteocentre.com/home_e.html
Canadian and US weather models for point forecast: http://spotwx.com/
National US radar (The Weather Channel): http://www.intellicast.com/National/Radar/Current.aspx
NWS Radar: http://www.weather.gov/Radar
Marine Stuff and Ocean Wave Forecasting:
National Weather Service Ocean Prediction: http://www.opc.ncep.noaa.gov/
Wave Height and Direction: http://polar.ncep.noaa.gov/waves/index2.shtml
NWS Marine forecast and products: http://www.nws.noaa.gov/om/marine/home.htm
Weather forecasts for sailors: http://www.passageweather.com/
Theory on waves:
500 mb “steering” level:
Ocean Weather Services: http://www.oceanweatherservices.com/featured_blog_posts/the_use_of_the_500_mb_chart_at_sea
Mariner’s Weather Log (more detailed): http://www.vos.noaa.gov/MWL/dec_08/milibar_chart.shtml
Canadian Ice Service: http://iceweb1.cis.ec.gc.ca/Prod20/page2.xhtml?CanID=11091&lang=en
Decoding weather maps:
NWS site: http://www.srh.weather.gov/jetstream/synoptic/wxmaps.htm
This example consists of a visible image (left) and an infrared image (right) of the same portion of the US taken at the same time. The letters mark cloud features that will be discussed in this image.
A. In visible, these clouds are fairly bright and they seem to follow the topography of the Appalachian regions of Kentucky and West Virginia. In the infrared image, they cannot be detected, indicating that the temperature of the cloud tops is close to the temperature at the ground. This indicates very low warm clouds. In this case, feature "A" shows valley fog.
B. A broad, flat expanse of clouds covers much of Georgia in the visible image, but cannot be seen in the infrared. These clouds must be low, flat, warm stratus and possibly fog.
C. Off the North Carolina Coast, these clouds are lumpy in places, fibrous and windswept in others. They are bright in the visible image, indicating very thick, tall clouds. They are very bright in the infrared, indicating very high, cold cloud tops. Finally, in the infrared image, the clouds exhibit a wedge shape that indicates a classic thunderstorm cumulonimbus cloud.
D. These clouds are small, round clouds that appear to be individual cells in the visible image. In the infrared image these clouds do not show up at all, indicating warm, low clouds. These are fair weather cumulus clouds, often seen in areas of the country experiencing fair weather.