Hurricane conditions are continuing across portions of the southern Florida peninsula.  Winds affecting the upper floors of high-rise buildings will be significantly stronger than those near ground level.  Tropical storm and hurricane conditions are expected to spread northward across the remainder of the warning areas through Monday.  Tropical storm conditions are expected in portions of the warning area in the Northwestern Bahamas this evening.


RAINFALL:  Irma is expected to produce the following rain accumulations through Wednesday:

  • Western Bahamas...Additional 2 to 4 inches, isolated 6 inches.
  • The Florida Keys...Additional 3 to 6 inches with storm total amounts
  • from 15 to 20 inches, isolated 25 inches.
  • Western Florida peninsula...10 to 15 inches, isolated 20 inches.
  • Eastern Florida peninsula and southeast Georgia...8 to 12 inches,
  • isolated 16 inches.

TORNADOES: Tornadoes remain possible through tonight, mainly across

central and eastern portions of the Florida Peninsula and extreme

southeast Georgia.

THE EYE: Do not venture outside when the calm eye of the hurricane

passes over, as dangerous winds will return very quickly when the

eye moves away.

SURF:  Swells generated by Irma are affecting the southeast coast of

the United States.  These swells are likely to cause life-

threatening surf and rip current conditions.  Please consult

products from your local weather office.


HAZARDS AFFECTING LAND

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
  • Anna Maria Island to Clearwater Beach, including Tampa Bay...
  • 5 to 8 ft
  • North Miami Beach to Card Sound Bridge, including Biscayne Bay...
  • 3 to 5 ft
  • South Santee River to Fernandina Beach...4 to 6 ft
  • Clearwater Beach to Ochlockonee River...4 to 6 ft
  • Fernandina Beach to Jupiter Inlet...3 to 5 ft
  • North of North Miami Beach to Jupiter Inlet...1 to 2 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

office.