[Tropical] Hurricane Local Statement

[EMWIN Server]

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Potential Tropical Cyclone Six Local Statement Advisory Number 4
National Weather Service San Juan PR  AL062021
1104 AM AST Tue Aug 10 2021

This product covers Puerto Rico and the US Virgin Islands

**NOAA HURRICANE HUNTER AIRCRAFT REPORTS THE DISTURBANCE IS NOT YET A
 TROPICAL CYCLONE**

NEW INFORMATION
---------------

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning is in effect for Central Interior,
      Culebra, Eastern Interior, Mayaguez and Vicinity, North
      Central, Northeast, Northwest, Ponce and Vicinity, San Juan and
      Vicinity, Southeast, Southwest, St Croix, St.Thomas...St.
      John...and Adjacent Islands, Vieques, and Western Interior

* STORM INFORMATION:
    - About 210 miles southeast of San Juan PR or about 160 miles
      south-southeast of Saint Thomas VI
    - 16.3N 63.8W
    - Storm Intensity 35 mph
    - Movement West-northwest or 295 degrees at 18 mph

SITUATION OVERVIEW
------------------

The external bands of Potential Tropical Cyclone Six are now affecting
the U.S. Virgin Islands, Vieques and Culebra. These rain bands are
producing periods of heavy rain and gusty winds. Tropical Storm
Warning remains in effect for Puerto Rico and the U.S. Virgin Islands
as the Potential Tropical Cyclone Six will likely become a Tropical
Storm later today or tonight. This system continues moving west-
northwestward at 18 mph across the northeastern Caribbean, and forecast
to pass near or over the U.S. Virgin Islands and Puerto Rico later
today and tonight. Therefore, tropical storm conditions are likely
across the local islands as early as this afternoon. This disturbance
will also bring heavy rains across the islands, with the potential for
life-threatening flash flooding and mudslides, as well as river
flooding. Eastern and southern Puerto Rico can expect the greatest
impact from this system. Marine and coastal conditions will deteriorate
by this afternoon, continuing through Wednesday. Isolated tornados
cannot be ruled out with the outer bands of this system, especially
when the disturbance moves closer to the islands.

POTENTIAL IMPACTS
-----------------

* FLOODING RAIN:
Protect against dangerous rainfall flooding having possible
significant impacts across eastern and southern Puerto Rico.
Potential impacts include:
    - Moderate rainfall flooding may prompt several evacuations and
      rescues.
    - Rivers and tributaries may quickly become swollen with swifter
      currents and overspill their banks in a few places, especially
      in usually vulnerable spots. Small streams, creeks, canals,
      arroyos, and ditches overflow.
    - Flood waters can enter some structures or weaken foundations.
      Several places may experience expanded areas of rapid
      inundation at underpasses, low-lying spots, and poor drainage
      areas. Some streets and parking lots take on moving water as
      storm drains and retention ponds overflow. Driving conditions
      become hazardous. Some road and bridge closures.

Protect against locally hazardous rainfall flooding having possible
limited impacts across the U.S. Virgin Islands.

* WIND:
Protect against hazardous wind having possible limited impacts across
Puerto Rico and the US Virgin Islands. Potential impacts include:
    - Damage to porches, awnings, carports, sheds, and unanchored
      mobile homes. Unsecured lightweight objects blown about.
    - Many large tree limbs broken off. A few trees snapped or
      uprooted, but with greater numbers in places where trees are
      shallow rooted. Some fences and roadway signs blown over.
    - A few roads impassable from debris, particularly within urban
      or heavily wooded places. Hazardous driving conditions on
      bridges and other elevated roadways.
    - Scattered power and communications outages.

* TORNADOES:
Protect against a tornado event having possible limited impacts
across Puerto Rico and the US Virgin Islands. Potential impacts
include:
    - The occurrence of isolated tornadoes can hinder the execution
      of emergency plans during tropical events.
    - A few places may experience tornado damage, along with power
      and communications disruptions.
    - Locations could realize roofs peeled off buildings, chimneys
      toppled, mobile homes pushed off foundations or overturned,
      large tree tops and branches snapped off, shallow-rooted trees
      knocked over, moving vehicles blown off roads, and small boats
      pulled from moorings.

PRECAUTIONARY/PREPAREDNESS ACTIONS
----------------------------------

* EVACUATIONS:

If you are exceptionally vulnerable to wind or water hazards from
tropical systems, consider voluntary evacuation, especially if being
officially recommended. Relocate to a predetermined shelter or safe
destination.

If evacuating away from the area or relocating to a nearby shelter,
leave early before weather conditions become hazardous.


* OTHER PREPAREDNESS INFORMATION:

When making safety and preparedness decisions, do not focus on the
exact forecast track as there are inherent forecast uncertainties which
must be taken into account.

If you live in a place particularly vulnerable to flooding, such as
near the ocean or a large inland lake, in a low lying or poor
drainage area, in a valley or canyon, or near an already swollen
river, plan to move to safe shelter on higher ground

Closely monitor NOAA Weather Radio or other local news outlets for
official storm information. Listen for possible changes to the
forecast.

* ADDITIONAL SOURCES OF INFORMATION:
- For information on appropriate preparations see ready.gov
- For information on creating an emergency plan see getagameplan.org
- For additional disaster preparedness information see redcross.org

NEXT UPDATE
-----------

The next local statement will be issued by the National Weather
Service in San Juan PR around 2 PM AST, or sooner if conditions
warrant.

$$
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