The Summer Simmer Index S and the Apparent Temperature A for both the average daily maximum and the average daily minimum temperature. If the “feels like” temperature often reported in summer weather forecasts measures the combined effects of humidity and high temperatures. Two of the most common models used to determine this effect are the Summer Simmer Index ( S ) developed by John W. Pepi and the Apparent Temperature ( A ) developed by Robert Steadman. These models are given by S = 1.98 T − 1.09 ( 1 − H ) ( T − 58 ) − 56.9 and A = − 42.38 + 2.049 T + 1014 H − 22.48 T H − 0.006838 T 2 − 548.2 H 2 + 0.1229 T 2 H + 8.528 T H 2 − 0.0199 T 2 H 2 where T is the air temperature (in degrees Fahrenheit) and H is the relative humidity (expressed as a decimal). In Dallas, Texas, the average daily maximum temperature and humidity for July is given by Maximum: 97.8 ∘ F with 44% humidity and the average daily minimum temperature and humidity for July is given by Minimum: 74.7 ∘ F with 80% humidity .

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Chapter 14.1, Problem 27E

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To calculate: The Summer Simmer Index S and the Apparent Temperature A for both the average daily maximum and the average daily minimum temperature. If the “feels like” temperature often reported in summer weather forecasts measures the combined effects of humidity and high temperatures. Two of the most common models used to determine this effect are the Summer Simmer Index (S) developed by John W. Pepi and the Apparent Temperature (A) developed by Robert Steadman. These models are given by S=1.98T−1.09(1−H)(T−58)−56.9 and A=−42.38+2.049T+1014H−22.48TH−0.006838T2−548.2H2+0.1229T2H+8.528TH2−0.0199T2H2 where T is the air temperature (in degrees Fahrenheit) and H is the relative humidity (expressed as a decimal). In Dallas, Texas, the average daily maximum temperature and humidity for July is given by Maximum: 97.8∘F with 44% humidity and the average daily minimum temperature and humidity for July is given by Minimum: 74.7∘F with 80% humidity.

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