Isaac Still a Tropical Storm

The 10 p.m. advisory package is in…
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LOCATION…27.1N 87.0W
ABOUT 190 MI…305 KM SE OF THE MOUTH OF THE MISSISSIPPI RIVER
ABOUT 255 MI…410 KM SSE OF BILOXI MISSISSIPPI
MAXIMUM SUSTAINED WINDS…70 MPH…110 KM/H
PRESENT MOVEMENT…NW OR 310 DEGREES AT 10 MPH…17 KM/H
MINIMUM CENTRAL PRESSURE…979 MB…28.91 INCHES

The pressure is low for a tropical storm, but that probably reflects the large size and relaxed pressure gradient.

The recon planes in the storm still can find no signs of significant strengthening.

Issac will likely become a hurricane overnight.

Tropical storm force winds are about to reach the mouth of the Mississippi River.

The projected track is shifted slightly back east by a few miles, over the city of New Orleans.

The projected intensity at landfall is back to 90 mph. Landafall should occur near Buras LA around 7 p.m. tomorrow night.

Strong tropical storm force winds (>58 mph) will reach New Orleans about midnight tomorrow night. Hurricane force winds will affect the city around 6 a.m. Wednesday, for about 4 hours, with slowly improving conditions Wednesday night and Thursday.

The forecasted forward speed has picked up a little bit after landfall, which will help somewhat with rainfall. Isaac wil be in southern Arkansas by Thursday evening, at which time it should no longer be tropical in nature.

Category: Tropical