Saturday, August 21, 2021

Hurricane Henri. Grace inland over Mexico

 The National Hurricane Center (NHC) says Henri is now a full category one, 75 mph hurricane.  They made the upgrade as of the 11 am, Saturday Advisory.



The satellite loop shows the transition between night and day. Growing from a compact swirl to a much larger and stronger system as of Saturday morning.

CONE:


It will continue to move towards the northeast section of the U.S.  This is what NHC has to say:

The latest run of the GFS
has shifted to the east, but overall the models are focused in on
landfall being between central Long Island and Rhode Island on
Sunday.  However, users are reminded to not focus on the center
itself, as impacts will extend well away from the center, especially
to the east.  

Impacts - Data from NHC. There are plenty:

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 could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...

Flushing, NY to Chatham, MA including Narragansett Bay, Buzzards
Bay, Vineyard Sound, and Nantucket Sound...3-5 ft
North shore of Long Island from Flushing to Montauk Point, NY
including Long Island Sound...3-5 ft
South shore of Long Island from Mastic Beach to Montauk Point,
NY...3-5 ft
Chatham, MA to Sagamore Beach, MA including Cape Cod Bay...2-4 ft
South shore of Long Island from East Rockaway Inlet to Mastic Beach,
NY...2-4 ft
Cape May, NJ to East Rockaway Inlet, NY...1-3 ft
Sagamore Beach, MA to Merrimack River including Massachusetts
Bay...1-3 ft

The deepest water will occur along the immediate coast in areas of
onshore winds, where the surge will be accompanied by large and
dangerous 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.

WIND:  Hurricane conditions are expected in the hurricane warning
area late tonight or on Sunday, with tropical storm conditions
expected by tonight.  Tropical storm conditions are expected in the 
tropical storm warning area late tonight and Sunday.

RAINFALL:  Henri is expected to produce rainfall amounts of 3 to 6
inches over portions of Long Island, New England, southeast New
York, and northern New Jersey Sunday into Monday, with isolated
maximum totals near 10 inches. Heavy rainfall from Henri may result
in considerable flash, urban, and small stream flooding, along with
the potential for widespread minor and isolated moderate river
flooding.

TORNADOES:  A tornado or two may occur Sunday over southern New
England.

SURF:  Swells generated by Henri should continue to affect Bermuda
during the next day or so.  Swells are expected to increase across
much of the east coast of the U.S. and Atlantic Canada today
and Sunday.  These swells could cause life-threatening surf and rip
current conditions.  Please consult products from your local
weather office.

Please remain vigilant. Power outages will occur long before the actual system moves on shore.  Get all your preps down today as quickly as possible.

Grace


After impacting the Mexican coastline as a category 3 with 125 mph, it has finally weakened to just below hurricane status. It is now a strong tropical storm still dumping plenty of rain. Flooding and mudslides will be widespread over the next few days.

Hoping for the next for our Mexican friends.


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