Tropical Storm Isaac is now Hurricane Isaac, a Category 1 hurricane. Winds reached 75 mph as the storm made its way toward the Louisiana coastline.

More from the National Hurricane Center:

REPORTS FROM AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT
INDICATE THAT MAXIMUM WINDS ASSOCIATED WITH ISAAC HAVE INCREASED
TO 75 MPH…120 KM/H. ON THIS BASIS…ISAAC IS BEING UPGRADED TO
A HURRICANE.

SUMMARY OF 1120 AM CDT…1620 UTC…INFORMATION
———————————————–
LOCATION…28.1N 88.6W
ABOUT 75 MI…115 KM SSE OF THE MOUTH OF THE MISSISSIPPI RIVER
ABOUT 160 MI…250 KM SE OF NEW ORLEANS LOUISIANA
MAXIMUM SUSTAINED WINDS…75 MPH…120 KM/H
PRESENT MOVEMENT…NW OR 310 DEGREES AT 10 MPH…17 KM/H
MINIMUM CENTRAL PRESSURE…975 MB…28.79 INCHES

For the latest tweets about evacuations, storm readiness and Issac’s path, see Twitchy’s guide to hurricane watchers on Twitter.

Full Twitchy coverage here.