Nate Lashes the Gulf Coast; Weakens Rapidly Inland-A Big Rainmaker For Some

Nate become the 4th hurricane of the hyperactive 2017 season to strike the U.S. (including Puerto Rico) this weekend. The last season with four or more U.S. landfalling hurricanes was 2005. It made two landfalls.The first near the mouth of the Mississippi River Saturday evening, the second near Biloxi Mississippi at 1:30 AM EDT Sunday as a category 1 hurricane with 85 mph.winds. The heaviest rain, strongest wind, and greatest storm surge was felt near and just east of the center.

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Nate will be remembered for its coastal flooding, a threat often underestimated with tropical system. A storm surge of 6.3 feet was recorded in Pascagoula Mississippi. Social media was blasted with photos and video of flooding in the Golden Nugget Casino in Biloxi. Mobile Alabama was also hit hard with coastal flooding. A storm surge of 5.4 feet was recorded there. The graphic shows the rise in water in Pascagoula, Mississippi  courtesy NOAA.

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Nate weakens rapidly Sunday morning over land. As of 11 AM it is a tropical depression. Max sustained winds are at 35 mph as it races north-northeast at 24 mph. It will weaken to a tropical depression Sunday. Nate is big rainmaker for portions, of the Southeast, Tennessee Valley, and eventually the Northeast U.S through Monday.

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Here is the 11 AM forecast track from the NHC. Nate will quickly lose tropical characteristics over the next 24-36 hours.

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3-6 inches of rainfall, with isolated high amounts are expected from central Gulf coast up through the southern Appalachians. The Weather Prediction Centers estimates 7-8″+ are possible in spots. This train of moisture brings heavy rain the Tennessee Valley and the Northeast U.S. too. Here are rainfall estimates from the Weather Prediction Center through Tuesday morning.

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Hurricane Nate Strengthens; Races Towards The Central Gulf Coast

Nate became the 9th consecutive hurricane of the 2017 Atlantic season Friday night. According to Dr. Klotzbach of Colorado State University this is the most consecutive hurricanes in the Atlantic since 1893. Nate continues to intensify over the warm Gulf of Mexico with a defined central dense overcast. An eye may be forming Saturday morning. Upper level winds favor further intensification too, and Nate is now projected to make landfall in southern Mississippi late Saturday evening as a category 2 hurricane. As of 11 AM, max sustained winds are at 90 mph as Nate races north-northwest at 26 mph. The only saving grace for Nate is that there is not much time left before landfall for long-term further strengthening. Hurricane Hunters are out there non stop. Data shows the strongest winds are felt east of its center. Hurricane force winds only extend out 25 miles from the center. This spares New Orleans from the worst wind. Spin up tornadoes are likely through Sunday morning in the right northeast quadrant. Tropical storm conditions will reach the Tennessee Valley by Sunday night. Nate will become a depression by Monday and bring a stream of steady rain through the Northeast through early Tuesday.

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Nate will bring life threatening storm surge to the central Gulf coast. The greatest storm surge will be near landfall and to areas just east. This includes coastal Mississippi, Alabama, and the western Florida Panhandle. Here is a breakdown of the significant storm surge threat as of the 11 AM advisory from the National Hurricane Center:

Mouth of the Mississippi River to the Mississippi/Alabama border-7
to 11 feet
Mississippi/Alabama border to the Alabama/Florida border, including
Mobile Bay-6 to 9 feet
Morgan City, Louisiana to the mouth of the Mississippi River-4 to
6 feet
Alabama/Florida border to the Okaloosa/Walton County Line-4 to 6
feet
Okaloosa/Walton County Line to Indian Pass, Florida-2 to 4 feet
Indian Pass to Crystal River, Florida-1 to 3 feet

Gulfport and Biloxi are especially vulnerable to coastal flooding. A storm surge of 12-15 feet is possible here.These areas are no stranger to big coastal flooding events from hurricanes, including Katrina in 2005 and Camile in 1969.

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Nate will also bring freshwater flooding to the U.S. It is a fast mover, though. While southeast Louisiana will see 1-4″+, southern Alabama could pick up 6-10 inches of rain. The potential for heavy rain moves through the Tennessee Valley Sunday and the Northeast Monday. The graphic below is courtesy NOAA. It shows possible rainfall totals through Tuesday morning.

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