r/MapPorn • • 11h ago

Galveston Bay - A week of currents

339 Upvotes

14 comments sorted by

40

u/vladgrinch 11h ago

Most of Galveston Bay's tide comes and goes through one gap, Bolivar Roads, between Galveston Island and the Bolivar Peninsula. At its strongest this week, the surface water there ran at about 3.4 knots.

Early in the week the tide turned only once a day, as it often does on the Gulf. By midweek it was turning twice.

These are the bay's surface currents hour by hour from 21 to 28 September 2026, colored by water temperature. Trinity Bay and West Bay stayed a degree or two cooler than the open Gulf.

6

u/NelsonMinar 11h ago

this is neat! what's the source, or how did you make it?

1

u/Holiday-Pangolin-491 10h ago

Is the water always this warm, or is it due to the super el niño?

6

u/zhupan28 9h ago

Water in the shallow Galveston Bay is very warm in the late summer and early fall, averaging around 30 C. The El Niño–Southern Oscillation is a quasi climatic phenomenon in the equatorial Pacific, and while it's effects on weather affect large swaths of the planet, the temperature anomalies are only found in the Pacific.

2

u/Pleadis-1234 9h ago

Afaik the temperature change in ocean water due to El nino is significant mostly in the east pacific

28

u/bloodrider1914 11h ago

This is way better than the usual right wing ragebait that seems to litter the sub. I can actually jerk off to this

4

u/bomber991 10h ago

Yeah this one is a bit sexual isn’t it?

2

u/bloodrider1914 10h ago

Me and the boys exchanging our bodily fluids with the ocean

1

u/zhupan28 9h ago

On the northeastern shore, there are many signs warning people not to swim there. This is why. Under the bay, which is naturally very shallow (no more than 3 meters deep), the Houston Ship Channel was dredged to a depth of up to 14 meters to allow for large ships to access the Port of Houston. This creates some rapid currents that will eject any swimmer into the Gulf of Mexico.

1

u/Antonio-Quadrifoglio 7h ago

I genuinely thought I was looking at an alien organism draining our ocean from outer space there

2

u/the_real_JFK_killer 5h ago

!!!GALVESTON MENTIONED!!!