All Weather News

The Aftermath of Isaac

30 Aug 2012, 11:39 am

We’re tracking the aftermath of Isaac, leaving flooding conditions across portions of the south and the fear of levees and dams failing.

Impacts of Isaac

We have seen numerous amounts of 6″+ totals coming out of the system so far, some of the heaviest in coastal areas and New Orleans. Here are some of the totals as of earlier today:

  • Pascagoula, MS: Approximately 20” (via WeatherBug stations in the area, the airport reported 7.5″ Wednesday)
  • Gretna, LA: 18.35”
  • New Orleans International Airport: 9.69”
  • Waveland, MS: 8.69”
  • Mobile, AL: 4.67”

Some of this heavy rain has led to severe flooding (along with the storm surge). We reported yesterday on the dam near Braithwaite, LA that water overtopped, causing water to reach the peaks of third-level homes in the area. This morning we are hearing of more cities underwater, including Pascagoula, MS and Slidell, LA. It appears the Slidell water was due to a breach in railroad tracks. We are also watching other dams this morning, as the NWS New Orleans put out a statement this morning that the Lake Tangipahoa Dam in southern Mississippi could end up failing later today.

The peak wind we have found was the 113 mph gust reported yesterday morning in Belle Chasse, LA that we reported on. However, one of the more impressive factoids that came out of the storm was that New Orleans had a wind gust of at least 30 mph for 51 straight hours during the storm!

The Times-Picayune is reporting this morning that 700,000 people lost power in Louisiana throughout the storm, and that most of New Orleans was included in that total. It is possible that some could be without power for a week.

And for those not along the Gulf Coast, gasoline saw its biggest national jump for one day in the past 18 months.

Where the Storm is Going Next


Isaac is quickly weakening as it heads somewhat northward, bringing rain over the next few days for the Central Plains and Ohio Valley.

The path of this storm is expected to be a little bit more south through the Ohio Valley over the next few days, and some areas including St. Louis and Louisville could see 4”+ of rain throughout the weekend. With the start of college football this weekend, there could be some soggy games out there!

You may ask if this system will continue to have strong winds like Ike did as it moves across the country. The answer should likely be no. We have a different upper air set up with Isaac compared to Ike, where it’s more favorable to weaken compared to what Ike did. You can see more in the explanatory graphic above from the NWS Wilmington OH office.

Other Tropical Systems

 There are a couple other tropical systems out there, neither of which is expected to currently affect the US and expected to mainly be fish and boat storms.

Hurricane Kirk is spinning out in the Central Atlantic, moving to the NW. Kirk should soon start turning to the northeast, avoiding both Bermuda and the Azores.

We also now have Tropical Storm Leslie, currently moving to the west. A gradual turn to the northwest is expected, as well as strengthening to hurricane status by the weekend. We’ll have to watch this system to make sure it doesn’t have any impacts on the Lesser Antilles or Bermuda.

Send us your photos!

We would also love to see your videos and photos of the storm — whether it’s of the storm rolling through your area or the aftermath of Isaac – of course, only if you can do it safely! Your safety is ALWAYS our number one concern here at WeatherNation. If you do so, you can upload them to the WeatherNationTV website by clicking here. You can also post them on our Facebook page, @ us on Twitter, or upload them via our app for iOS devices (like the iPhone). You can help tell the story of how Isaac has affected your area and your photos/videos may be featured on-air and online!

Stick with WeatherNation for the very latest on recovery efforts of Isaac as well as the weather for your area!

Meteorologist D.J. Kayser
Follow me on Twitter at: @weathrlver

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