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Chris Bedford’s Summer Race Day Forecast Links

October 31, 2001

When trying to figure out what the weather will be like before a big race day, inexperienced competitors sometimes make the mistake of jumping right to the forecast. They want to know how strong the wind will be and what direction. If the forecast is a good one, this may not be a mistake. However almost every forecast has at least a little bit of error, and a general overview of the weather can help take some of the mystery out of things when the reality strays from prediction.

Following are some internet links targeted to summer racing areas — Newport, R.I., Kingston, Ontario, and Chicago — however other popular racing areas are also included. Great care has been taken to select reliable links, that are run either by official sources or have been around for a long time. However data availability is not guaranteed. Always check the map times to make sure you are looking at the latest available information. Also, make sure your web browser has caching turned OFF. Caching may prevent you from seeing the latest information even if it is posted. Hitting “Refresh” or “Reload” often will also usually solve issues related to Caching.

Whenever using the internet for weather information, we have to include an important disclaimer. Weather forecasts and other weather related information found on the internet should not be substituted for official National Weather Service (NWS) forecast and warning information issued by local NWS offices. You should monitor your local NOAA broadcast on VHF or other official sources.

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CURRENT CONDITIONS

First off, get a general weather picture by checking out the lasted official weather map from the National Weather Service. This will tell you where the major weather feature are located.

Next, drill down a little further and find out what kind of weather is being reported around the region.

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For the NE US and Lake Ontario, surface conditions on land are updated hourly at

For Chicago and Lake Michigan, check out http://www.rap.ucar.edu/weather/surface/sfc_dtw.gif

Offshore weather can be checked at

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and

Note: It takes about 30 minutes for offshore data to update, so check out these links between 30 and 60 minutes after the hour. You can get previous hours’ data at:

To find out what’s happening offshore in better detail, check out the buoy reports from the NOAA.

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For the NE US go to:

For CORK on Lake Ontario, go to:

For Chicago and Lake Michigan, go to: http://www.ndbc.noaa.gov/Maps/WestGL.shtml

SATELLITE IMAGERY

Surface observations tell you what’s happening at a particular point, but not in between. One way to help fill in the blanks is to look at the satellite imagery. Here are some links to help you out in Newport and at CORK:

Visible Still Image (Daylight Only) –

Visible Loop ( Daylight Only) http://www.rap.ucar.edu/weather/satellite/displaySat.php3?region=ALB&isingle;=multiple&itype;=vis

Infrared Still Image (All hours) –

Infrared Loop (All hours) – http://www.rap.ucar.edu/weather/satellite/displaySat.php3?region=ALB&isingle;=multiple&itype;=irbw

For Chicago and Lake Michigan, the satellite images are at the following links:

Visible Still Image (Daylight Only) – http://www.rap.ucar.edu/weather/satellite/latest_DTW_vis.jpg

Visible Loop ( Daylight Only) http://www.rap.ucar.edu/weather/satellite/displaySat.php3?region=DTW&isingle;=multiple&itype;=vis

Infrared Still Image (All hours) – http://www.rap.ucar.edu/weather/satellite/latest_DTW_irbw.jpg

Infrared Loop (All hours) – http://www.rap.ucar.edu/weather/satellite/displaySat.php3?region=DTW&isingle;=multiple&itype;=irbw

RADAR

Rain can significantly impact the winds, especially when there are individual showers or thunderstorms around. Check out the following links to the latest radar images.

Newport –

CORK –

Chicago –

TEXT FORECASTS

Once you’ve got a good overview of what’s happening, take a look at the official forecasts for the area in which you will be sailing. Pay particular attention to any warnings or advisories that may be active for the area.

National Weather Service Forecasts

Southeast New England/Newport –

Lake Ontario/CORK –

Chicago –

For CORK, check out the official Canadian Forecasts at

http://weatheroffice.ec.gc.ca/scripts/marinegen.pl?client=ecmar_e&city;=45135

FORECAST MODELS

A number of forecast models are executed which make predictions of the weather across the country. Familiarize yourself with predictions from one of the more widely used models at:

http://www.rap.ucar.edu/weather/model/displayMod.php3?var=eta_sfc_mslp&loop;=1

Some higher resolution models will give you a more detailed prediction:

Note – watch valid map times carefully!

For New England /Newport:

For CORK and Chicago:

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