TIMELINE: Subtropical storm Alberto's impact on Tennessee Valley

The Tennessee Valley could see 2-4" of rainfall from Alberto (Source: WAFF)
The Tennessee Valley could see 2-4" of rainfall from Alberto (Source: WAFF)
Published: May. 28, 2018 at 8:48 PM CDT|Updated: May. 29, 2018 at 8:02 PM CDT
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(WAFF) - Tennessee Valley

Subtropical Storm Alberto officially made landfall northwest of Panama City Beach, Florida at roughly 4:00 PM CDT Monday evening and has now been downgraded to a Subtropical Depression.


The center of the system moved through Montgomery very early Tuesday morning and will continue to track north along I-65 into the Tennessee Valley throughout the day.

The center of the storm is expected to move right over the Shoals and northwest Alabama by this afternoon and that is when we will start to see the greatest impacts to the Tennessee Valley.

IMPACTS: Our main concern will be locally heavy rainfall through Wednesday morning. A Flash Flood Watch is in effect through 7:00 AM CDT for 1" to 3"+ of forecasted rainfall, with localized heavier rain possible. River flooding and flooded roadways will also be a concern Tuesday.

The heaviest rain looks to fall to the west of I-65 as the center of the system moves over that area. I wouldn't be surprised if some spots east of I-65 into northeast Alabama only saw around 0.50" to 1.00" of rainfall.

While the heaviest rain will be into northwest Alabama, northeast Alabama is under the greatest threat for severe weather, mainly isolated spin-up tornadoes. If they do form, they will be low-end and short lasting. Confidence is low on the tornado forecast, but as we typically see with tropical systems, a few brief spin-up tornadoes cannot be ruled out.

Strong wind gusts will NOT be a major concern with this storm, but we will see our wind speeds increase as the center of the storm moves closer. Sustained winds between 10-20 miles per hour out of the northeast are likely with occasional wind gusts over 30 miles per hour.

Wind speeds will likely begin to die down by late Tuesday night as the low-pressure center continues to track north and weaken.

Please stay weather aware and check back with your WAFF 48 First Alert Weather Team and 48 Weather App for updates regarding Tuesday's forecast.

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