I live in Missouri, on south edge of Iowa, it is spring tornado season here & these 2 states average about 8 tornadoes each in April, Nevada averages 0 per year, while Iowa goes on to average 12 in May and 13 in June.
While Iowa fits the fiction, there are not yet any structural integrity fields here in real 21st century life & in the interests of attraction survivability Nevada is real-life smarter than Iowa.
And then there's winter, Las Vegas averages rather less snow than Iowa,
Las Vegas annual average snowfall is around 0.3 inch, 7.62mm, & Iowa averages 18 to 45 inches, 457mm to 1143mm, annual snowfall,
and the weight of snow accumulation on top of that vast expanse of saucer is gonna be an issue,
especially when it is that heavy wet snow.
Let's see, TMP enterprise saucer seems to have a diameter of 142 meters, therefore radius of 71 meters.
pi r squared = saucer surface area of 15836 sq m.
Let's see, Google says heavy wet snow can weigh 320 to 800 kg per cubic meter.
Let's use a 5 inch snowfall, 5x25.4 = 127mm snowfall.
That's about 12.7% of the depth of a cubic meter.
So, that 5 inch, 127mm, snowfall of heavy wet snow could weigh 12.7% x 600kg per cubic meter = 76.2 kg per sqm.
So, 76.2 kg per sqm x 15836 sqm saucer upper surface area =
Snowfall weight of 1,206,703 kg on to of saucer.
or
1206 metric tons
or, for us imperial holdouts,
that's 2,660,324 lbs of snow on the saucer top.
or
1330 tons of 2000 lbs
Build it in Nevada, not in Florida where you have hurricanes & not in iowa where you could have a million kilograms of snow land on the saucer..