HURRICANE DEAN INTERMEDIATE ADVISORY NUMBER 28A
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL042007
200 AM EDT MON AUG 20 2007

A HURRICANE WARNING IS IN EFFECT FOR THE COAST OF BELIZE AND THE
EAST COAST OF THE YUCATAN PENINSULA OF MEXICO FROM BELIZE CITY
NORTHWARD TO CANCUN. A HURRICANE WARNING REMAINS IN EFFECT FOR
JAMAICA AND THE CAYMAN ISLANDS. A HURRICANE WARNING MEANS THAT
HURRICANE CONDITIONS ARE EXPECTED WITHIN THE WARNING AREA WITHIN
THE NEXT 24 HOURS. PREPARATIONS TO PROTECT LIFE AND PROPERTY
SHOULD BE RUSHED TO COMPLETION.

A TROPICAL STORM WATCH ALSO REMAINS IN EFFECT FOR PORTIONS OF THE
COAST OF BELIZE FROM SOUTH OF BELIZE CITY SOUTHWARD TO THE
BELIZE/GUATEMALA BORDER.

DEAN IS MOVING TOWARD THE WEST NEAR 20 MPH...32 KM/HR...AND THIS
GENERAL MOTION IS EXPECTED TO CONTINUE DURING THE NEXT 24 HOURS.
ON THIS TRACK THE CENTER OF DEAN WILL PASS JUST SOUTH OF THE CAYMAN
ISLANDS LATER THIS MORNING.

REPORTS FROM AN AIR FORCE RESERVE HURRICANE HUNTER AIRCRAFT INDICATE
THAT MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 150 MPH...240
KM/HR...WITH HIGHER GUSTS. DEAN IS AN EXTREMELY DANGEROUS CATEGORY
FOUR HURRICANE ON THE SAFFIR-SIMPSON HURRICANE SCALE. DEAN COULD
REACH CATEGORY FIVE STRENGTH TODAY.

HURRICANE FORCE WINDS EXTEND OUTWARD UP TO 60 MILES...95 KM...FROM
THE CENTER...AND TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 205
MILES
...335 KM.

AN AIR FORCE HURRICANE HUNTER PLANE RECENTLY REPORTED A MINIMUM
CENTRAL PRESSURE OF 926 MB...27.34 INCHES.

COASTAL STORM SURGE FLOODING OF 5 TO 7 FEET ABOVE NORMAL TIDE
LEVELS...ALONG WITH LARGE AND DANGEROUS BATTERING WAVES...IS
POSSIBLE NEAR THE CENTER OF DEAN WITHIN THE HURRICANE WARNING AREAS
IN JAMAICA AND THE CAYMAN ISLANDS. STORM SURGE FLOODING AND WAVES
IN JAMAICA SHOULD SUBSIDE LATER TODAY. COASTAL STORM SURGE
FLOODING OF 9 TO 11 FEET ABOVE NORMAL TIDE LEVELS IS POSSIBLE NEAR
AND TO THE NORTH OF WHERE DEAN MAKES LANDFALL ALONG THE EAST COAST
OF THE YUCATAN PENINSULA.

STORM TOTAL RAINFALL AMOUNTS OF 5 TO 10 INCHES CAN BE EXPECTED OVER
JAMAICA AND THE YUCATAN PENINSULA...WITH MAXIMUM AMOUNTS OF UP TO 20
INCHES.

REPEATING THE 200 AM EDT POSITION...17.7 N...79.7 W. MOVEMENT
TOWARD...WEST NEAR 20 MPH.
MAXIMUM SUSTAINED WINDS...150 MPH.
MINIMUM CENTRAL PRESSURE...926 MB.