WTNT34 KNHC 290252
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BULLETIN
Hurricane Isaac Advisory Number 32
NWS National Hurricane Center Miami FL AL092012
1000 PM CDT Tue Aug 28 2012

...ISAAC PRODUCING A DANGEROUS STORM SURGE ALONG THE NORTHERN
GULF COAST FLOODING FROM RAINFALL TO FOLLOW...

SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...29.0N 89.7W
ABOUT 75 MI...120 KM SE OF HOUMA LOUISIANA
ABOUT 75 MI...120 KM SSE OF NEW ORLEANS LOUISIANA
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 8 MPH...13 KM/H
MINIMUM CENTRAL PRESSURE...968 MB...28.59 INCHES

WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

The Tropical Storm Watch from west of Cameron Louisiana to
Sabine Pass Texas has been replaced with a Tropical Storm
Warning.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Hurricane Warning is in effect for...
* East of Morgan City Louisiana to the Mississippi-Alabama
border...including metropolitan New Orleans...Lake
Pontchartrain...and Lake Maurepas

A Hurricane Watch is in effect for...
* Intracoastal City to Morgan City Louisiana

A Tropical Storm Warning is in effect for...
* The Mississippi-Alabama border to Destin Florida
* Morgan City to Sabine Pass Texas

A Tropical Storm Watch is in effect for...
* East of High Island Texas to just west of Sabine Pass

A Storm Surge Warning is in effect for...
* Intracoastal City to Morgan City Louisiana

A storm surge warning means there is a danger of
life-threatening inundation during the next 36 hours
in the indicated locations. For a depiction of areas 
at risk, please see the National Weather Service
Storm Surge Watch/Warning Graphic, available at
hurricanes.gov. This is a life-threatening situation.
Persons located within these areas should take all
necessary actions to protect life and property from
rising water and the potential for other dangerous
conditions. Promptly follow evacuation and other
instructions from local officials. For storm
information specific to your area, including possible
inland watches and warnings, please monitor products
issued by your local National Weather Service
forecast office.

DISCUSSION AND OUTLOOK
----------------------
At 1000 PM CDT (0300 UTC), the eye of Hurricane Isaac
was located by NOAA Doppler radar near latitude 29.0
North, longitude 89.7 West. Isaac is moving toward the 
northwest near 8 mph (13 km/h). A northwestward motion
at a slightly slower speed is expected over the next
day or two. On the forecast track, the center of
Hurricane Isaac will continue moving near or over the
southeastern coast of Louisiana tonight, and move
farther inland over southeastern Louisiana during the
next day or so.

Maximum sustained winds are near 80 mph (130 km/h),
with higher gusts. Isaac is a category one hurricane
on the Saffir-Simpson hurricane wind scale. Little
change in strength is forecast tonight. Slow weakening
is expected after that.

Hurricane force winds extend outward up to 60 miles
(95 km) from the center, and tropical storm force
winds extend outward up to 185 miles (295 km). Tropical
storm conditions are occurring along the coastal areas
of southeastern Louisiana, Mississippi, and Alabama. A
sustained wind of 56 mph with a gust to 69 mph was
observed within the past hour at a National Ocean
Service site at Shell Beach Louisiana. A wind gust to
67 mph was recently reported at Lakefront Airport on the
south shore of Lake Pontchartrain near New Orleans. The
latest minimum central pressure reported reconnaissance
aircraft was 968 mb (28.59 inches).

HAZARDS AFFECTING LAND
----------------------
STORM SURGE: The combination of a dangerous storm surge
and the tide will cause normally dry areas near the
coast to be flooded by rising waters. The water could
reach the following heights above ground if the peak
surge occurs at the time of high tide...

Mississippi and southeastern Louisiana...6 to 12 ft
Alabama...4 to 8 ft
South-central Louisiana...3 to 6 ft
Florida panhandle...3 to 6 ft
Apalachee Bay...2 to 4 ft
Remainder of Florida west coast...1 to 3 ft

The deepest water will occur along the immediate coast
in areas of onshore winds. Surge-related flooding depends
on the relative timing of the surge and the tidal cycle,
and can vary greatly over short distances. For information
specific to your area, please see products issued by your
local Weather Service office. Near the coast, the surge
will be accompanied by large and dangerous waves.

A storm surge of 10.3 feet was recently reported at a
National Ocean Service tide gauge at Shell Beach
Louisiana. A storm surge of 6.7 feet was observed at a
National Ocean Service tide gauge in Waveland Mississippi.

WIND: Tropical storm conditions will continue across the
warning area overnight, and hurricane conditions will
continue to spread onshore across southeastern Louisiana.

Winds affecting the upper floors of high-rise buildings
will be significantly stronger than those near ground level.
At about the 30th story, winds would likely be one 
Saffir-Simpson category stronger than at the surface.

RAINFALL: Isaac is expected to produce total rainfall
amounts of 7 to 14 inches, with possible isolated maximum
amounts of 20 inches, over much of Louisiana, southern
Mississippi, southern Alabama, and the extreme western
Florida panhandle. These rains could result in significant
lowland flooding.

TORNADOES: Isolated tornadoes are possible along the central
gulf coast region and parts of the lower Mississippi river
valley through Wednesday.

SURF: Dangerous surf and rip current conditions will
continue to affect the west coast of Florida and the 
northern gulf coast for the next day or so.

NEXT ADVISORY
-------------
Next intermediate advisory at 100 AM CDT.
Next complete advisory at 400 AM CDT.

$$

Forecaster Brown