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Next, let's look at Grand Rapids/Kalamazoo, Michigan:
Grand Rapids is 700 miles north of San Diego. Although it is not far from the Great Lakes, it basically shows a typical inland temperature pattern.There is good overnight cooling, with the result that the Heat Index stays out of the High Risk Zone until 12 noon. Very hot temperatures occur sometimes, but some August 4th patterns are quite cool. On average, this is a reasonable site for competitions on this date. Next, we'll look at Atlanta:
Atlanta is about 650 miles south of Grand Rapids, and slightly north of San Diego. It sits at an altitude of 1010 feet in the foothills of the southern tip of the Appalachian Mountains, and this fact moderates its heating. The Atlanta pattern features reasonable overnight cooling, but heat index values are in the high risk zone from 10 a.m. until 8 p.m. August 4th competitions in Atlanta will be associated with significant risk of heat injury. The next city is San Antonio: |
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