Skip Navigation Links weather.gov   
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
National Hurricane Center
Local forecast by
"City, St" or "ZIP"

 
Alternate Formats
   Text     |   Mobile
   Email   |   RSS XML/RSS logo
   About Alternates
Cyclone Forecasts
   Latest Advisory
   Past Advisories
   Audio/Podcasts
   About Advisories
Marine Forecasts
   Atlantic & E Pacific
   Gridded Marine
   About Marine
Tools & Data
   Satellite | Radar
   Analysis Tools
   Aircraft Recon
   GIS Datasets
   Data Archive
Development
   Experimental
   Research
   Forecast Accuracy
Outreach & Education
   Prepare
   Storm Surge
   About Cyclones
   Cyclone Names
   Wind Scale
   Most Extreme
   Forecast Models
   Breakpoints
   Resources
   Glossary | Acronyms
   Frequent Questions
Our Organization
   About NHC
   Mission & Vision
   Staff | Q&A
   Visitors | Virtual Tour
   Library Branch
   NCEP | Newsletter
Contact Us
   Comments
Follow the National Hurricane Cent
er on Facebook Follow the National Hurricane Center on Twitter
FirstGov.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.
 
 

Tropical Storm ISAAC


ZCZC MIATCPAT4 ALL
TTAA00 KNHC DDHHMM
 
BULLETIN
TROPICAL STORM ISAAC INTERMEDIATE ADVISORY NUMBER  21A
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092012
800 AM EDT SUN AUG 26 2012
 
...ISAAC EXPECTED TO BE NEAR THE FLORIDA KEYS LATER TODAY...
 
 
SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION
----------------------------------------------
LOCATION...23.5N 80.0W
ABOUT 135 MI...220 KM ESE OF KEY WEST FLORIDA
ABOUT 155 MI...245 KM E OF HAVANA CUBA
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 20 MPH...31 KM/H
MINIMUM CENTRAL PRESSURE...995 MB...29.38 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
THE GOVERNMENT OF THE BAHAMAS HAS DISCONTINUED THE TROPICAL STORM
WARNING FOR THE CENTRAL AND SOUTHEASTERN BAHAMAS...AND HAS CHANGED
THE HURRICANE WARNING TO A TROPICAL STORM WARNING FOR ANDROS
ISLAND.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A HURRICANE WARNING IS IN EFFECT FOR...
* THE FLORIDA KEYS INCLUDING THE DRY TORTUGAS
* THE WEST COAST OF FLORIDA FROM BONITA BEACH SOUTHWARD TO OCEAN
REEF
* FLORIDA BAY
 
A HURRICANE WATCH IS IN EFFECT FOR...
* THE FLORIDA EAST COAST FROM GOLDEN BEACH SOUTHWARD TO OCEAN REEF
* THE MOUTH OF THE MISSISSIPPI RIVER TO INDIAN PASS FLORIDA...NOT
INCLUDING METROPOLITAN NEW ORLEANS
 
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* THE CUBAN PROVINCES OF CIEGO DE AVILA...SANCTI SPIRITUS...VILLA
CLARA...CAMAGUEY...LAS TUNAS...GRANMA...HOLGUIN...SANTIAGO DE
CUBA...AND GUANTANAMO
* THE NORTHWESTERN BAHAMAS
* THE FLORIDA EAST COAST FROM SEBASTIAN INLET SOUTHWARD TO OCEAN
REEF
* LAKE OKEECHOBEE
* THE FLORIDA WEST COAST AND THE FLORIDA PANHANDLE FROM NORTH OF
BONITA BEACH TO INDIAN PASS...INCLUDING TAMPA BAY
 
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* THE CUBAN PROVINCES OF MATANZAS AND CIENFUEGOS
* THE FLORIDA EAST COAST NORTH OF SEBASTIAN INLET TO FLAGLER BEACH
 
A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE NEXT 24
HOURS. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED
TO COMPLETION.
 
A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE
WITHIN THE WATCH AREA. A WATCH IS TYPICALLY ISSUED 48 HOURS
BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE
WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR
DANGEROUS.
 
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.
 
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS.
 
INTERESTS IN THE REMAINDER OF CUBA...THE REMAINDER OF FLORIDA...AND
THE REMAINDER OF THE NORTHERN GULF COAST SHOULD MONITOR THE PROGRESS
OF ISAAC.
 
FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED STATES...
INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE MONITOR
PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST
OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE THE
UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL
METEOROLOGICAL SERVICE.
 
 
DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 800 AM EDT...1200 UTC...THE CENTER OF TROPICAL STORM ISAAC WAS
LOCATED NEAR LATITUDE 23.5 NORTH...LONGITUDE 80.0 WEST. ISAAC IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 20 MPH...31 KM/H. A WEST-
NORTHWESTWARD TO NORTHWESTWARD MOTION IS EXPECTED DURING THE NEXT
48 HOURS WITH A GRADUAL DECREASE IN FORWARD SPEED.  ON THE FORECAST
TRACK...THE CENTER OF ISAAC IS EXPECTED TO MOVE JUST NORTH OF CUBA
THIS MORNING...MOVE NEAR OR OVER THE FLORIDA KEYS LATER TODAY AND
TONIGHT...AND MOVE INTO THE EASTERN GULF OF MEXICO ON MONDAY.
 
MAXIMUM SUSTAINED WINDS ARE NEAR 65 MPH...100 KM/H...WITH HIGHER
GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS...
AND ISAAC IS EXPECTED TO BE AT OR NEAR HURRICANE STRENGTH WHEN IT
REACHES THE FLORIDA KEYS.
 
TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 205 MILES...335 KM
FROM THE CENTER.  MOLASSES REEF RECENTLY REPORTED A WIND GUST TO 54
MPH...87 KM/H.
 
THE LATEST MINIMUM CENTRAL PRESSURE REPORTED BY THE AIRCRAFT WAS 995
MB...29.38 INCHES.
 
 
HAZARDS AFFECTING LAND
----------------------
RAINFALL...TOTAL RAINFALL ACCUMULATIONS OF 4 TO 8 INCHES...WITH
MAXIMUM AMOUNTS OF 12 INCHES...ARE POSSIBLE ACROSS THE FLORIDA
KEYS...THE SOUTHERN PENINSULA OF FLORIDA AND PORTIONS OF CENTRAL AND
EASTERN CUBA. TOTAL RAIN ACCUMULATIONS OF 3 TO 6 INCHES ARE
POSSIBLE OVER THE CENTRAL AND SOUTHERN BAHAMAS.
 
WIND...TROPICAL STORM CONDITIONS ARE OCCURRING OVER PORTIONS OF
EASTERN AND CENTRAL CUBA AND THE BAHAMAS AND THE TURKS AND CAICOS
ISLANDS. TROPICAL STORM CONDITIONS ARE POSSIBLE IN PORTIONS OF
NORTHWESTERN CUBA BY LATE TODAY.
 
HURRICANE CONDITIONS ARE EXPECTED IN THE HURRICANE WARNING AREA IN
SOUTHWEST FLORIDA AND THE FLORIDA KEYS TODAY. HOWEVER...THE
LIKELIHOOD OF HURRICANE CONDITIONS OCCURRING IN SOUTHEAST FLORIDA
IS DECREASING.  

TROPICAL STORM CONDITIONS ARE OCCURRING IN THE TROPICAL
STORM WARNING AREA ALONG THE FLORIDA EAST COAST. TROPICAL STORM
CONDITIONS ARE EXPECTED TO SPREAD NORTHWARD ALONG THE WEST COAST OF
FLORIDA AND INTO THE EASTERN FLORIDA PANHANDLE IN THE TROPICAL
STORM WARNING AREA TONIGHT AND MONDAY.
 
HURRICANE CONDITIONS ARE POSSIBLE IN THE HURRICANE WATCH AREA ALONG
THE NORTHERN GULF COAST ON TUESDAY...WITH TROPICAL STORM CONDITIONS
POSSIBLE BY MONDAY NIGHT.
 
STORM SURGE...THE COMBINATION OF A 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 DEPTHS ABOVE GROUND IF
THE PEAK SURGE OCCURS AT THE TIME OF HIGH TIDE...
 
* CRYSTAL RIVER THROUGH THE BIG BEND OF FLORIDA...4 TO 7 FT
* SOUTHWEST FLORIDA COAST WITHIN HURRICANE WARNING AREA...4 TO 6 FT
* FLORIDA WEST COAST FROM BONITA BEACH TO SOUTH OF CRYSTAL RIVER
INCLUDING TAMPA BAY...3 TO 5 FT
* SOUTHEAST FLORIDA COAST AND THE FLORIDA KEYS...1 TO 3 FT
* CENTRAL AND EASTERN CUBA...1 TO 3 FT
* THE BAHAMAS...1 TO 3 FT
 
THE DEEPEST WATER WILL OCCUR ALONG THE IMMEDIATE COAST IN AREAS OF
ONSHORE FLOW. 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 DANGEROUS WAVES.
 
TORNADOES...ISOLATED TORNADOES ARE POSSIBLE OVER PORTIONS OF CENTRAL
AND SOUTHERN FLORIDA AND THE FLORIDA KEYS TODAY.
 
SURF...DANGEROUS SURF AND RIP CURRENT CONDITIONS WILL CONTINUE TO
AFFECT THE BAHAMAS...THE TURKS AND CAICOS...EASTERN AND CENTRAL
CUBA...THE FLORIDA PENINSULA AND THE FLORIDA KEYS DURING THE NEXT
COUPLE OF DAYS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER
OFFICE FOR MORE INFORMATION.
 
 
NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY...1100 AM EDT.
 
$$
FORECASTER PASCH/ROBERTS
 
NNNN


Quick Navigation Links:
Tropical Cyclone Forecasts  -  Tropical Marine Forecasts  -  Data Archive
Outreach  -  Prepare  -  About Cyclones  -  About NHC  -  Contact Us

NOAA/ National Weather Service
National Centers for Environmental Prediction
National Hurricane Center
11691 SW 17th Street
Miami, Florida 33165-2149 USA
nhcwebmaster@noaa.gov
Disclaimer
Credits
Information Quality
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities
Page last modified: Monday, 31-Dec-2012 12:09:25 UTC