Tropical Updates

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Hurricane Laura Update - Wednesday August 26 4:00 am

Click HERE to see the 4 am slides for Hurricane Laura.

Here is an update concerning Hurricane Laura. 

Changes from previous update: 
Flash Flood Watch has been extended eastward to the Pearl River. No other significant changes. 
MODERATE RISK FOR HEAVY RAINFALL....2 to 5" of rain possible today with a streak of double that possible. That means if the streak is over you, flash flooding is possible and subsequently could lead to river flooding.

Overview:
Hurricane Laura made landfall near Cameron Louisiana as a powerful category 4 hurricane just after midnight. Hurricane Laura will continue to push inland after making landfall and gradually weaken today.

Impacts:

Storm Surge:

Ongoing surge will continue today but levels will gradually begin to lower later today through Friday

  • Possible storm surge inundation levels:

    • Morgan City to MS River: 4-7 ft inundation, highest values mainly west of Grand Isle

    • All other coastal areas: 1-3 ft

  • Expect low-lying, coastal roads to remain flooded and several may remain impassable through tonight

  • Some areas will remain cut off or inaccessible

Wind and Tornado: 

  • Wind gusts above tropical storm force will continue through much ofthe morning hours mainly across areas near and just east of the Atchafalaya River
  • These winds could result in minor damage mainly to trees, powerlines, and weaker structures.  A few trees may fall and block roadways or damage structures.
  • Tornadoes will also be possible in the storm’s rain bands today. Tornadoes in these situations are typically short-lived, but they move very quickly

Rainfall/Flooding:

  • A flash flood watch is in effect through 7pm today

  • There is a potential for heavy rainfall if/where any of Laura's outer bands track

  • Expect ponding of water in low lying areas and some potential for localized flash flooding

The attached briefing below highlights the threats associated with this system.

Additional Information and Resources:
NWS New Orleans Website: www.weather.gov/neworleans
NWS New Orleans DSS Website: http://www.weather.gov/lix/embrief
NWS New Orleans Tropical Page: https://www.weather.gov/srh/tropical?office=lix
River Gauges and Forecasts: http://water.weather.gov/ahps2/index.php?wfo=lix
NWS New Orleans Facebook: www.facebook.com/NWSNewOrleans
NWS New Orleans Twitter: https://twitter.com/NWSNewOrleans
Online Severe Weather Reporting: https://www.weather.gov/lix/submit_storm_report
National Hurricane Center Website: https://www.nhc.noaa.gov/



Next Update and Contact Information:
The next update will be sent by 11 AM CDT.  If you have any questions in the interim or need additional information, please do not hesitate to contact us.  We can be reached by phone at 504-522-7330 or 985-649-0429.  Use extension 4 to speak with a forecaster.  Alternatively, you can reach us by email by replying to this message or sending an email to sr-lix.forecasters@noaa.gov. Both methods will be delivered to the forecasters on shift at the office.
 
Regards,
Erickson
Meteorologist
NWS New Orleans/Baton Rouge
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