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1933 Florida–Mexico hurricane

Category 1 Atlantic hurricane in 1933

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Through Flood

Once over water, the storm shifted its course to the west-southwest and gradually regained intensity, its path bringing it to the mouth of the Rio Grande in early August. On August 4 the storm restrengthened into a hurricane, just a day before striking near Playa Lauro Villar—a site in northern Tamaulipas, Mexico—with winds of 90 mph (150 km/h), equal to a high-end Category 1 hurricane on the Saffir–Simpson scale; it was the first of two hurricanes in 1933 to impact nearby South Texas. Hitting close to the Mexico–United States border, its winds damaged buildings and crops in both nations, with heavy losses to citrus production in the Rio Grande Valley. While only one person died in the United States, the storm dropped much rain over northern Mexico, engendering catastrophic floods that claimed at least 31 lives, with the worst-hit areas being in and near the city of Monterrey. While monetary losses in Mexico were unclear, the storm did at least $3,000,000 in damages in the United States, measured in contemporary U.S. dollars.

Meteorological history

The origins of the storm were from a tropical depression that was located on July 24 about 430 mi (690 km) east of Saint Lucia in the Windward Islands. This was based on analysis of ship reports and evidence of a closed low-pressure area, as conducted by the Hurricane Research Division in 2012. The depression formed at the same time as another tropical system developed over 450 mi (725 km) east of Bermuda. Upon formation, it moved generally west-northwest, toward the eastern Caribbean, becoming a tropical storm on July 25. At 16:00 UTC the vessel Daytonian first recorded gale-force winds—45 mph (72 km/h), or Beaufort Force 9. Around that time, the storm made landfall on the island of Antigua with winds of 60–70 mph (95–110 km/h). A barometer on Saba measured 983 mb (29.02 inHg), implying maximum sustained winds of 85 mph (140 km/h); based on this, the storm is estimated to have acquired hurricane status on July 26. The storm traversed the United States Virgin Islands, missing Puerto Rico to its northeast, and on July 27 passed a short distance to the north of Grand Turk Island, gradually bending northwest as it followed the arc of the eastern Bahamas. On July 28 the cyclone struck Cat Island with winds of 80 mph (130 km/h), and the next day made another landfall on the Abaco Islands with the same winds. A robust subtropical ridge then caused it to veer westward, toward the east coast of Florida. On July 30, the ship El Almirante became the only vessel to detect hurricane winds in the storm.

The storm made its only landfall in the United States on Jupiter Island, Florida, between Port Salerno and Hobe Sound, around 16:00 UTC. A ship nearby measured 992 mb (29.3 inHg) and winds of 50 mph (80 km/h), consistent with a landfall value of 988 mb (29.2 inHg); from this reanalysis derived winds of 75 mph (120 km/h), due to a tight pressure gradient and small storm size. After landfall, the storm weakened to a tropical storm and moved slowly westward across the south-central peninsula, crossing the northern end of Lake Okeechobee early on July 31. It then passed slightly north of Punta Gorda, exiting the state between Venice and Englewood with winds of 45 mph (75 km/h). Once in the Gulf of Mexico, it encountered few ships, complicating efforts to discern its location and intensity. On August 1, it began a persistent west-southwest motion that continued for the rest of its lifecycle. A few ships on August 1–3 noted modest gales of 40 mph (64 km/h) and minimum pressures of 1,004 mb (29.65 inHg), confirming a weaker cyclone than earlier. Based on the latter, reanalysis inferred that the storm began gradually restrengthening on August 2, reaching 65 mph (100 km/h) at the time of the reading. On August 4 the storm reclaimed hurricane status, unbeknown to forecasters at the time, who lacked ample marine observations. Angling westward, it reached a secondary peak of 90 mph (150 km/h), and around 01:00 UTC on August 5, its eye made landfall near Playa Lauro Villar, Tamaulipas, just south of the Rio Grande, as verified by anemometers in Brownsville, Texas. Based on these, scientists determined the radius of maximum wind to be 30 mi (50 km). Brownsville also documented pressures of 981 to 982 mb (28.98 to 29 inHg), attesting a central value of 975 mb (28.79 inHg). Now hooking west-southwest, the storm quickly weakened due to high terrain and vanished over easternmost Nuevo León by 18:00 UTC.

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