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"Bi-Sun-Tennial" Advertising. During my trips from Shreveport LA to Galveston TX during the bicentennial year of 1976, there were numerous billboard advertisements themed with a play on words combining the bicentennial year theme with the abundant sunshine of a vacation to Galveston. Typical of places located at or near the Gulf (of Mexico) coast, short rains were common during the summer, but usually cleared up and transitioned back to sunshine. Stated another way, there was a low risk of getting rained out during a day trip to Galveston. The weather was very similar to what I experienced while living (or visiting friends and relatives) in cities near the Louisiana Gulf (of Mexico) coast (Lafayette, Lake Charles, New Iberia, New Orleans, Thibodaux, etc.). To clarify,

The weather in Shreveport LA, however, was similar to that of northeast Texas cities (Dallas, Fort Worth, Longview, etc.) located near the southern extent of the interior plains. Due in part to the lower specific heat of the dry air, summer temperatures at or above 100 degrees were fairly common.