…IDA MOVING NORTHWESTWARD OVER SOUTHEASTERN LOUISIANA…
…CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING CONTINUES IN PORTIONS OF SOUTHEASTERN LOUISIANA…
Catastrophic wind damage is likely near the core of Ida as it moves inland over southeastern Louisiana through this evening.
A Storm Surge Warning is in effect for…
* Morgan City Louisiana to the Alabama/Florida state line
* Lake Borgne, Lake Pontchartrain, Lake Maurepas, and Mobile Bay
A Hurricane Warning is in effect for…
* Morgan City Louisiana to the Mouth of the Pearl River
* Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans
A Tropical Storm Warning is in effect for…
* Intracoastal City Louisiana to west of Morgan City Louisiana
* Mouth of the Pearl River to the Alabama/Florida state line
Hurricane conditions will spread farther inland within the Hurricane Warning area over southeastern Louisiana tonight.
Tropical storm conditions will also spread inland over portions of Louisiana and Mississippi tonight and Monday.
Tornadoes will be most likely through Monday over southeast Louisiana, southern Mississippi, southwest Alabama, and the western Florida Panhandle.
A few tornadoes are also possible farther north across much of Mississippi and Alabama on Monday.
For storm information specific to your area, including inland watches and warnings, please monitor products issued by your local National Weather Service forecast office.
At 4 p.m. CDT, the center of Hurricane Ida was located inland over Louisana about 45 miles (75 km) south-southwest of New Orleans and about 70 miles (115 km) south-southeast of Baton Rouge. Ida is moving toward the northwest near 10 mph (17 km/h).
A turn toward the northis expected overnight, followed by a slightly faster northeastward motion by Monday night and Tuesday.
On the forecast track, the center of Ida will move farther inland over southeastern Louisiana tonight. Ida is then forecast to move well inland over portions of western Mississippi Monday and Monday night, and move across the Tennessee Valley on Tuesday.
Doppler radar data indicate that the maximum sustained winds are near 130 mph (215 km/h) with higher gusts. Ida is an extremely dangerous category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 150 miles
(240 km).
A Weatherflow station near Dulac just reported sustained winds of 93 mph (150 km/h) and a gust to 135 mph (217 km/h). A Florida Coastal Monitoring Program observing station at the South Lafourche airport recently reported a sustained wind of 91 mph (146 km/h) and wind gust of 122 mph (196 km/h).
A sustained wind of 51 mph (81 km/h) and a gust to 82 mph (131 km/h) was recently reported at Lakefront Airport in New Orleans. The estimated minimum central pressure is 938 mb (27.70 inches).
Rapid weakening is expected during the next day or so, however Ida is forecast to remain a hurricane through late tonight and remain a tropical storm until Monday afternoon.
The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline.
The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide:
– Port Fourchon, LA to Mouth of the Mississippi River…12-16 ft
– Morgan City, LA to Port Fourchon, LA …8-12 ft
– Mouth of the Mississippi River to Bay St. Louis, MS incl. Lake Borgne…8-12 ft
– Burns Point, LA to Morgan City, LA…6-8 ft
– Lake Pontchartrain…5-8 ft
– Ocean Springs, MS to MS/AL border…4-7 ft
– Lake Maurepas…4-6 ft
– East of Intracoastal City, LA to Burns Point, LA incl. Vermilion Bay…3-5 ft
– MS/AL state line to AL/FL border incl. Mobile Bay…3-5 ft
– Rockefeller Wildlife Refuge, LA to Intracoastal City, LA…1-3 ft
– AL/FL state line to Okaloosa/Walton County Line incl. Pensacola Bay…1-3 ft
Overtopping of local levees outside of the Hurricane and Storm Damage Risk Reduction System is possible where local inundation values may be higher than those shown above.
Heavy rainfall from Ida will continue to impact the southeast Louisiana coast, spreading northeast into the Lower Mississippi Valley this evening into Monday.
Total rainfall accumulations of 10 to 18 inches with isolated maximum amounts of 24 inches are possible across southeast Louisiana into far southern Mississippi through Monday.
This is likely to result in life-threatening flash and urban flooding and significant river flooding impacts.
The next advisory will be issued by NHC at 10 p.m. CDT with an intermediate advisory at 7 p.m .CDT – www.hurricanes.gov
