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Subtropical Storm Alberto Advisory Number 9
NWS National Hurricane Center Miami FL AL012018
1100 AM EDT Sun May 27 2018
...ALBERTO MOVING NORTHWARD TOWARD THE NORTHERN GULF COAST...
SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION
ABOUT 130 MI...210 KM WSW OF TAMPA FLORIDA
ABOUT 185 MI...295 KM SSE OF APALACHICOLA FLORIDA
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...N OR 5 DEGREES AT 14 MPH...22 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
The Tropical Storm Warning for the Dry Tortugas has been
The Tropical Storm Watch along the north-central Gulf Coast has
The Storm Surge Watch has been discontinued west of the
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Watch is in effect for...
* Crystal River to the Florida/Alabama border
A Tropical Storm Warning is in effect for...
* Bonita Beach to the Mississippi/Alabama border
A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations. For a depiction of areas at
risk, please see the National Weather Service Storm Surge
Watch/Warning Graphic, available at hurricanes.gov.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.
DISCUSSION AND OUTLOOK
At 1100 AM EDT (1500 UTC), the center of Subtropical Storm Alberto
was located near latitude 27.1 North, longitude 84.4 West. The
storm is moving toward the north near 14 mph (22 km/h). A turn
toward the north-northwest at a slower forward speed is forecast
tonight. A north-northwestward to northward motion is expected late
Monday through Wednesday. On the forecast track, the center of
Alberto will cross the eastern and northern Gulf of Mexico today and
approach the northern Gulf Coast in the warning area tonight or
Monday. Heavy rainfall and tropical storm conditions will likely
reach the northern Gulf Coast well before the arrival of the center
of Alberto. Alberto is expected to move northward into the
Tennessee Valley on Tuesday and Wednesday.
Maximum sustained winds have increased to near 50 mph (85 km/h) with
higher gusts. Some additional strengthening is forecast before the
system reaches the northern Gulf Coast. Steady weakening is
expected after landfall, and Alberto is forecast to become a
tropical depression by Monday night or Tuesday.
Winds of 40 mph extend outward up to 125 miles (205 km) primarily to
the east of the center.
The latest minimum central pressure reported by an Air Force
Reserve reconnaissance aircraft is 994 mb (29.36 inches).
HAZARDS AFFECTING LAND
RAINFALL: Alberto is expected to produce the following rain
accumulations through Tuesday:
Central Cuba...Additional 5 to 10 inches, isolated storm totals of
The Florida panhandle into eastern Alabama and western Georgia...4
to 8 inches, isolated 12 inches.
The Florida Keys and south Florida...Additional 3 to 6 inches,
isolated storm totals of 10 inches.
Rest of the Florida peninsula...1 to 4 inches.
Rest of the southeast U.S. from Tennessee to the Carolinas...2 to 6
Rains in Cuba could produce life-threatening flash floods and
mudslides. Flooding and flash flooding are possible in the southeast
United States, including Florida.
WIND: Tropical storm conditions will spread northward in the
warning area along the west coast of Florida today and will reach
the warning area along the northern Gulf Coast by this evening.
STORM SURGE: The combination of 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 could reach the
following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...
Crystal River to the Florida/Alabama border...2 to 4 ft
The deepest water will occur along the immediate coast. 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.
TORNADOES: A few tornadoes are possible across the Florida
SURF: Swells generated by Alberto will affect the eastern and
northern Gulf Coast through Tuesday. These swells are likely
to cause life-threatening surf and rip current conditions. For more
information, consult products from your local weather office.
Next intermediate advisory at 200 PM EDT.
Next complete advisory at 500 PM EDT.