8:00 PM EDT on August 20, 2007
..Hurricane Dean very near category five strength...
...Outer bands arriving along the East Coast of the Yucatan
A Hurricane Warning remains in effect for the entire coastline of
Belize...along the East Coast of the Yucatan Peninsula from the
Belize/Mexico border northward to Cancun...and along the West Coast
of the Yucatan Peninsula from south of Progresso southward to
ciudad del Carmen. Preparations to protect life and property
should be rushed to completion.
A Tropical Storm Warning remains in effect on the Yucatan Peninsula
from north of Cancun to Progresso.
At 800 PM EDT...0000z...the center of Hurricane Dean was located
near latitude 18.2 north...longitude 85.1 west or about 210 miles...
335 km...east of Chetumal Mexico.
Dean is moving toward the west near 20 mph...32 km/hr...and a
westward or west-northwestward motion is expected over the next 24
hours. On this track the center of the hurricane is expected to
make landfall on the Yucatan Peninsula very early Tuesday morning.
However...conditions are already beginning to deteriorate along the
East Coast of the Yucatan Peninsula.
Reports from an Air Force Reserve unit hurricane hunter aircraft
indicate that maximum sustained winds have increased and are now
near 155 mph...245 km/hr...with higher gusts. Dean is an extremely
dangerous category four hurricane on the Saffir-Simpson scale.
Some strengthening is expected later tonight...and Dean is likely
to become a category five hurricane prior to making landfall.
Hurricane force winds extend outward up to 60 miles...95 km...from
the center...and tropical storm force winds extend outward up to 175
The minimum central pressure reported by an Air Force Reserve unit
reconnaissance aircraft was 915 mb...27.02 inches.
Dean is expected to produce storm total rainfall of 5 to 10 inches
over the Yucatan Peninsula...Belize...Guatemala...and northern
Honduras...with maximum amounts of up to 20 inches. These
rains could cause life-threatening flash floods and mud slides.
Coastal storm surge flooding of 5 to 7 feet above normal tide
levels...along with large and dangerous battering waves...is
possible in the Cayman Islands. Storm surge flooding of 12 to 18
feet above normal tide levels is possible near and to the north of
where Dean makes landfall along the East Coast of the Yucatan
Repeating the 800 PM EDT position...18.2 N...85.1 W. Movement
toward...west near 20 mph. Maximum sustained winds...155 mph.
Minimum central pressure...915 mb.