HURRICANE IRMA: South Palm Beach County No Longer In Cone

hurricane News

8p Update From National Hurricane Center. South Palm Beach County is No Longer In The Cone.

BOCA RATON, FL ( — South Palm Beach County is no longer in the “cone” issued by the National Hurricane Center. That does not mean all is clear, just that all is looking a lot better than it was. The cone is shaded white above. The Red is the outline of the Florida peninsula where warnings remain in effect.
From the NHC at 8p:
At 800 PM EDT (0000 UTC), the eye of Hurricane Irma was located by
a NOAA Hurricane Hunter aircraft and NWS Doppler radar near
latitude 23.3 North, longitude 80.8 West. Radar loops indicate
that Irma has temporarily slowed down, but the hurricane has been
moving toward the west-northwest near 7 mph (11 km/h) since earlier
today. A northwest motion is expected to begin tonight with a turn
toward the north-northwest on Sunday. On the forecast track, the
core of Irma will continue to move near the north coast of Cuba
during the next few hours, and should be near the Florida Keys
Sunday morning. The hurricane is expected to move along or near the
southwest coast of Florida Sunday afternoon.
A NOAA Hurricane Hunter aircraft has found that Irma’s intensity is
a little lower, and the maximum sustained winds are estimated to be
near 120 mph (195 km/h) with higher gusts. Irma is a category 3
hurricane on the Saffir-Simpson Hurricane Wind Scale. Irma is
forecast to restrengthen once it moves away from Cuba and remain a
powerful hurricane as it approaches Florida.
Hurricane-force winds extend outward up to 70 miles (110 km) from
the center, and tropical-storm-force winds extend outward up to 195
miles (315 km). Marathon International Airport recently reported a
sustained wind of 48 mph (77 km/h) and a gust to 67 mph (108 km/h).
The minimum central pressure based on aircraft data is 932 mb
(27.52 inches).
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 moving inland from the shoreline. The water is
expected to reach the following HEIGHTS ABOVE GROUND if the peak
surge occurs at the time of high tide…
Cape Sable to Captiva…10 to 15 ft
Captiva to Ana Maria Island…6 to 10 ft
Card Sound Bridge through Cape Sable, including the Florida Keys…
5 to 10 ft
Ana Maria Island to Clearwater Beach, including Tampa Bay…
5 to 8 ft
North Miami Beach to Card Sound Bridge, including Biscayne Bay…
4 to 6 ft
South Santee River to Fernandina Beach…4 to 6 ft
Clearwater Beach to Ochlockonee River…4 to 6 ft
Fernandina Beach to North Miami Beach…2 to 4 ft
The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
destructive waves. 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 National Weather Service forecast
The combination of a life-threatening storm surge and large breaking
waves will raise water levels ABOVE NORMAL TIDE LEVELS by the
following amounts within the hurricane warning area near and to the
north of the center of Irma. Near the coast, the surge will be
accompanied by large and destructive waves.
Northwestern Bahamas…3 to 6 ft
Northern coast of Cuba in the warning area…5 to 10 ft
WIND: Hurricane conditions are expected to continue within the
hurricane warning area along the north coast of Cuba through
tonight. Hurricane conditions are expected in portions of the
northwestern Bahamas tonight, and in portions of the Florida
peninsula and the Florida Keys beginning Sunday morning. Tropical
storm and hurricane conditions are expected to spread northward
across the remainder of the warning areas through Monday.
RAINFALL: Irma is expected to produce the following rain
accumulations through Wednesday:
Northern Cuba…10 to 15 inches, isolated 20 inches.
Southern Cuba…5 to 10 inches, isolated 15 inches.
Western Bahamas…3 to 6 inches, isolated 10 inches.
The Florida Keys…10 to 20 inches, isolated 25 inches.
The Florida peninsula and southeast Georgia…8 to 15 inches,
isolated 20 inches.
The eastern Florida Panhandle and southern South Carolina…4 to 8
inches, isolated 10 inches.
Rest of eastern Georgia, western South Carolina, and western North
Carolina…4 to 8 inches.
Western Georgia, eastern and northern Alabama, and southern
Tennessee…2 to 5 inches.
In all areas this rainfall may cause life-threatening flash floods
and, in some areas, mudslides.
TORNADOES: A few tornadoes are possible this evening and tonight
over south Florida, expanding northward into central Florida on
SURF: Swells generated by Irma are affecting the southeastern
Bahamas, the Turks and Caicos Islands and the southeast coast of the
United States today. These swells are likely to cause life-
threatening surf and rip current conditions. Please consult
products from your local weather office.


Paul Saperstein


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