Thursday, September 04, 2008

Hanna targetting South Carolina now - 5 day Track + Advisory #27

Okay, here's the short version. After killing 25 people, Hanna is turning - she's become larger, but not stronger. She still packs a punch with heavy 60mph (95km/h) winds and rain, and has slowly started moving northward, but as a Cyclone rather than a Hurricane (Cyclone's spin in the opposite direction).

Florida can expect moderate to heavy rain on Friday, storm surge flooding of 1-3 feet, and very dangerous rip currents.

Ike meanwhile is approaching quickly, and is now a stronger (70mph winds) but so far a smaller system.

Read more: Hanna a threat to the US

clipped from www.nhc.noaa.gov
[Image of 5-day forecast of predicted track, and coastal areas under a warning or a watch]
blog it

...HANNA GETTING LARGER...BUT NOT STRONGER...AS IT EDGES NORTHWARD...

HANNA IS MOVING TOWARD THE NORTH NEAR 6 MPH...9 KM/HR. A TURN TO THE NORTHWEST WITH AN INCREASE IN FORWARD SPEED IS EXPECTED OVER THE NEXT 24 HOURS. ON THE FORECAST TRACK...THE CENTER OF HANNA SHOULD BE MOVING THROUGH OR JUST EAST OF THE CENTRAL AND
NORTHWESTERN BAHAMAS OVER THE NEXT COUPLE OF DAYS.

MAXIMUM SUSTAINED WINDS ARE NEAR 60 MPH...95 KM/HR...WITH HIGHER GUSTS. LITTLE CHANGE IN STRENGTH IS FORECAST TODAY...BUT HANNA COULD REGAIN HURRICANE STRENGTH TOMORROW OR ON FRIDAY.

HANNA HAS BECOME A LARGE TROPICAL CYCLONE. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 290 MILES...465 KM...MAINLY TO THE NORTH OF THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 997 MB...29.44 INCHES. HANNA IS EXPECTED TO PRODUCE RAINFALL TOTALS OF 4 TO 8 INCHES... WITH MAXIMUM ISOLATED AMOUNTS OF 12 INCHES...OVER THE SOUTHEASTERN BAHAMAS...THE TURKS AND CAICOS ISLANDS...AND EASTERN CUBA. RAINFALL TOTALS OF 6 TO 10 INCHES...WITH ISOLATED MAXIMUM AMOUNTS OF UP TO
15 INCHES...ARE POSSIBLE OVER HISPANIOLA...WHERE THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES. MODERATE TO LOCALLY HEAVY RAINFALL IS POSSIBLE ALONG THE EAST COAST OF FLORIDA BY FRIDAY MORNING.

COASTAL STORM SURGE FLOODING OF 1 TO 3 FEET ABOVE NORMAL TIDE LEVELS CAN BE EXPECTED IN AREAS OF ONSHORE FLOW WITHIN THE HURRICANE WARNING AREA.

SWELLS FROM HANNA ARE EXPECTED TO INCREASE THE RISK OF DANGEROUS RIP CURRENTS ALONG PORTIONS OF THE SOUTHEASTERN UNITED STATES COAST DURING THE NEXT COUPLE OF DAYS.

REPEATING THE 1100 AM AST POSITION...20.6 N...71.8 W. MOVEMENT TOWARD...NORTH NEAR 6 MPH. MAXIMUM SUSTAINED WINDS...60 MPH. MINIMUM CENTRAL PRESSURE...997 MB.

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