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Wednesday AM Forecast: Dangerous heat by the weekend, new tropical storm in Atlantic

1 hour 17 minutes 28 seconds ago Wednesday, August 12 2026 Aug 12, 2026 August 12, 2026 10:40 AM August 12, 2026 in Forecast Discussion
Source: The Storm Station

Temperatures will continue to increase, especially over the weekend. This is where the upper 90s and high humidity are likely. In the tropics, the 3rd named storm of the season has recently formed.

Today & Tonight: The rinse and repeat summer weather pattern will continue on Wednesday. The first half of the day will have a lot of sunshine and dry conditions. Highs will reach into the mid-90s under partly sunny skies. Humidity will send our peak heat index near 106°, which is just below official heat advisory criteria. Storms are possible, but most will stay dry as coverage will remain isolated. Any remaining showers will fizzle out overnight, with lows in the mid-70s. 

Up Next: Drier air will move in by the end of the week, effectively shutting down the chances for pop-up storms. At the same time, a ridge of high pressure will move directly overhead. Not only will this limit storm development, but it will also increase temperatures. A string of highs in the upper 90s are likely Friday through early next week. Feels-like temperatures will increase as well, with peak values 108°+ by the weekend. This means that heat alerts are likely to return. Hydration will be very important as the heat increases. Heat illness is a very real threat, so make sure to take this next heat wave seriously. 


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The Tropics:

Tropical Storm Cristobal:

The low-pressure system we've been watching far east of Bermuda has officially strengthened into Tropical Storm Cristobal, packing maximum winds near 45 mph. The storm is currently moving quickly east over marginally warm ocean waters, but it is expected to curve toward the northeast tonight while slowing down. Cristobal will be short-lived: as it moves over cooler waters, dry air, and strong upper-level winds, it will gradually weaken until it completely dissipates on Thursday.

Central Tropical Atlantic:

An area of showers and thunderstorms associated with a tropical wave is located about 900 miles west-southwest of the Cabo Verde Islands. Environmental conditions are forecast to be conducive for development during the next couple of days, and a tropical depression will likely form while the system moves westward to west-northwestward across the central tropical Atlantic.

Eastern Tropical Atlantic:

A tropical wave just offshore of the coast of west Africa is producing disorganized showers and thunderstorms. Environmental conditions are forecast to be generally conducive for some development of this system during the next several days while it moves westward or west-northwestward across the eastern and central tropical Atlantic.

– Balin

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