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Fri Aug 9, 2019, 05:10 PM

The heat index in Galveston has remained above 100 for over 30 hours.

Even in the dead of night, there’s no respite. The Texas Gulf Coast city registered its warmest low temperature on record Thursday.
Washington Post
By Matthew Cappucci
August 9 at 4:29 PM

The heat index hit 100 degrees at 5:52 a.m. Thursday in Galveston, Tex. And, as of Friday afternoon, it hadn’t dropped below the century mark since. It’s part of a larger heat wave across the Deep South and Southern Plains that shows no signs of letting up through at least next week.

The National Weather Service in Houston issued an excessive heat warning for “high heat index values between 108 and 114 degrees” during the day on Thursday. Heat advisories stretched over 1,000 miles from the U.S./Mexico border to Georgia, encompassing more than 30 million in the forecast for “dangerous heat.” Galveston failed to drop below 86 degrees Thursday, marking its warmest all-time low temperature on record! Records there date back to 1874. Galveston also set a daily record high Thursday, hitting 96 degrees.

Sure it’s summer, and it’s supposed to be hot. What makes this heat wave noteworthy is the exceptional humidity accompanying it. It’s much more difficult to get high temperatures when there’s copious water in the air. It’s because of water’s inherent “thermal inertia,” or the tendency for water to put the brakes on big temperature swings.

Gulf of Mexico water temperatures are running between 1 and 2 degrees above average. That adds additional water vapor to the air. Thrust atop an environment that’s already warming due to climate change, and these sorts of oppressive heat waves are becoming and will continue to be increasingly common in the years ahead.


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Reply The heat index in Galveston has remained above 100 for over 30 hours. (Original post)
bronxiteforever Aug 2019 OP
virgogal Aug 2019 #1

Response to bronxiteforever (Original post)

Fri Aug 9, 2019, 06:40 PM

1. God help anyone w/o AC------sounds brutal.


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