Hurricane Ida Briefing 8/27/21 At 5 PM

Click HERE for an update concerning Hurricane Ida

Changes from the last update:

• Increase to Category 4 with 140 mph at landfall..
• Increase in storm surge to 10 to 15 ft for areas west of the MS River.

Overview:

• Hurricane Ida will continue northwest with strengthening expected before entering the Southeastern Gulf late Friday or early Saturday.
• This system is expected to continue northwest and is currently forecast to impact portions of the northern Gulf coast Sunday through early Monday.

Confidence:

• There is high confidence in the forecast track and intensity of this system; moderate confidence with timing.

Impacts

Winds

• Hurricane-force winds (>74mph) will be possible for our entire area
• Strong hurricane-force winds (>110mph) will be possible for portions of our area, including Metro New Orleans, Metro Baton Rouge and all coastal LA parishes

Storm Surge

• Storm Surge values have increased since the last advisory
• 10-15ft of inundation from Morgan City of Mouth of the MS River.
• 7-11ft of inundation from Mouth of the MS River to Ocean Springs
• 4-7ft  of inundation Ocean Springs to the AL border
• 4-7ft  of inundation Lake Pontchartrain
• 3-5ft  of inundation Lake Maurepas

Rainfall/Inland Flooding

• 8-16" of rain is possible across our forecast area with isolated higher amounts of 20" possible 
• The heaviest rainfall will be possible Sunday and Monday

Tornadoes

• There is a risk of weak/short-lived tornadoes across SE LA and S MS