Hurricane Ida Update - Sunday Aug 29, 10 am

IDA REMAINS A VERY DANGEROUS CATEGORY 4 HURRICANE AND WILL MAKE LANDFALL IN SOUTHEAST LOUISIANA WITHIN THE NEXT FEW HOURS. CONDITIONS ARE RAPIDLY DETERIORATING ACROSS COASTAL AREAS AND WILL ALSO DETERIORATE INLAND THROUGHOUT THE DAY.

Click HERE for the latest update.

Changes from the last update:

• No significant changes to the forecast or impacts

Overview:

• Hurricane Ida is approaching the southeast Louisiana coast, with landfall expected in the next few hours
• Conditions are rapidly deteriorating across coastal areas and will deteriorate across inland areas throughout the day

Impacts:

Winds

• Major hurricane-force winds (>110mph) are expected across portions of the area, with a swath of devastating damage near where Ida's center moves as a major hurricane
• Hurricane-force winds (>74mph) will be possible for our entire area and are likely across southeast Louisiana.
• Elsewhere, tropical storm-force winds (>39mph) are likely.

Storm Surge

• Significant and life-threatening storm surge is expected with peak inundation levels possibly reaching the following heights. With the shifts in the track eastward over the last few advisories, the higher ends of these values could easily be realized. This is especially the case in the tidal lakes and along and east of where Ida makes landfall.
• 8-12ft: Morgan City to Port Fourchon
  12-16ft: Port Fourchon to the Mouth of the Mississippi River
  8-12ft: Mouth of the Mississippi River to Bay St. Louis
  6-9ft: Bay St. Louis to Ocean Springs
  4-7ft: Ocean Springs to the Mississippi/Alabama border
  5-8ft: Lake Pontchartrain
  4-6ft: Lake Maurepas

Rainfall/Inland Flooding

• A large area of 10-18" is expected with a swath of 15-20" near the center of the track including in the metro Baton Rouge and New Orleans areas.
• Localized amounts in excess of 24" are possible
• The heaviest rainfall is expected today and Monday.

Tornadoes

• There is a threat of weak/short-lived tornadoes across our entire forecast area.

The attached briefing 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:

Our 11 AM webinar is still scheduled and the next new update will be following the 4 PM CDT NHC update, earlier if there are any significant changes.

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.