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Subtropical Storm Alberto Intermediate Advisory Number 7A
NWS National Hurricane Center Miami FL AL012018
200 AM EDT Sun May 27 2018
...ALBERTO MOVING NORTH-NORTHEASTWARD OVER THE EASTERN GULF OF
...HEAVY RAINS AND GUSTY WINDS CONTINUE TO SPREAD NORTHWARD OVER
SUMMARY OF 200 AM EDT...0600 UTC...INFORMATION
ABOUT 105 MI...170 KM WSW OF THE DRY TORTUGAS
ABOUT 380 MI...615 KM S OF APALACHICOLA FLORIDA
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...NNE OR 15 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Watch is in effect for...
* Crystal River to the Mississippi/Alabama border
A Tropical Storm Warning is in effect for...
* Dry Tortugas
* Bonita Beach to Anclote River
* Aucilla River to the Mississippi/Alabama border
A Tropical Storm Watch is in effect for...
* Mississippi/Alabama border to the Mouth of the Pearl River
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 during the next 48 hours.
For a depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area.
A Tropical Storm Watch means that tropical storm conditions are
possible in the United States portion of that watch area within
For storm information specific to your area in the United States,
including possible inland watches and warnings, please monitor
products issued by your local National Weather Service forecast
office. For storm information specific to your area outside the
United States, please monitor products issued by your national
DISCUSSION AND OUTLOOK
At 200 AM EDT (0600 UTC), the center of Subtropical Storm Alberto
was located near latitude 24.2 North, longitude 84.5 West. The storm
is moving generally toward the north-northeast near 13 mph (20
km/h). A turn toward the north is expected later this morning, and
a motion toward the north-northwest is forecast this afternoon
through Monday night. On the forecast track, the center of Alberto
will cross the eastern and northern Gulf of Mexico through Monday,
and make landfall over the northern Gulf Coast in the warning area
late Monday afternoon or Monday night. Heavy rainfall and tropical
storm conditions will likely reach the northern Gulf Coast well
before the arrival of the center of Alberto.
Maximum sustained winds remain near 40 mph (65 km/h) with higher
gusts. Gradual strengthening is forecast until the system reaches
the northern Gulf Coast on Monday. Steady weakening is expected
after Alberto makes landfall.
Winds of 40 mph extend outward up to 140 miles (220 km) mainly to
the east of the center. The NOAA automated station at Pulaski
Shoals, Florida, recently reported sustained winds of 33 mph (54
km/h) and a wind gust of 39 mph (63 km/h).
The estimated minimum central pressure measured by the Air Force
Reserve Hurricane Hunter aircraft a few hours ago was 1001 mb
HAZARDS AFFECTING LAND
RAINFALL: Alberto is expected to produce total rain accumulations
of 10 to 15 inches with isolated totals of 25 inches across western
Cuba. These rains could produce life-threatening flash floods and
mudslides. Rainfall accumulations of 3 to 7 inches with maximum
amounts of 10 inches are possible across the Florida Keys and
southern Florida. Heavy rains will begin to affect the eastern Gulf
Coast region into the southeastern United States later today and
continue into the middle of next week as Alberto moves northward
after landfall. Rainfall totals of 5 to 10 inches with maximum
amounts of 15 inches are possible along the track of Alberto from
much of Alabama and the Florida Panhandle into western Tennessee.
Rainfall totals of 3 to 5 inches with maximum totals of 8 inches
are possible across eastern Mississippi and from the southern
Appalachians into the coastal southeast United States.
WIND: Tropical storm conditions are occurring in the Dry Tortugas,
and these conditions are expected to spread northward in the warning
area along the west coast of Florida later today. Tropical storm
conditions are expected within the warning area along the northern
Gulf Coast by tonight. Tropical storm conditions are possible in the
watch area along the northern Gulf Coast by Monday.
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 Mississippi/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: Isolated tornadoes are possible across the Florida Keys
and south Florida overnight, and are possible across the entire
state of Florida later today.
SURF: Swells generated by Alberto will continue to spread northward
along the eastern and northern Gulf Coast through Monday. These
swells are likely to cause life-threatening surf and rip current
conditions. For more information, consult products from your local
Next complete advisory at 500 AM EDT.