[Tropical] Hurricane Local Statement

[EMWIN Server]

WTCA82 TJSJ 300029
HLSSJU
PRZ001>013-VIZ001-002-300830-

Potential Tropical Cyclone Nine Local Statement
Intermediate Advisory Number 6A
National Weather Service San Juan PR  AL092020
829 PM AST Wed Jul 29 2020

This product covers Puerto Rico and the US Virgin Islands

**HEAVY RAINFALL AND GUSTY WINDS CONTINUE TO MOVE OVER THE U.S. AND
 British VIRGIN ISLANDS...AND PUERTO RICO**

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 170 miles south of San Juan PR or about 170 miles
      south-southeast of Mayaguez PR
    - 16.0N 66.3W
    - Storm Intensity 45 mph
    - Movement West-northwest or 285 degrees at 18 mph

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

A Tropical Storm Warning remains in effect for Puerto Rico and the
U.S. Virgin Islands. Doppler radar and recent surface observations
indicate heavy rainfall and gusty conditions moving into the
northern U.S. Virgin Islands. Significant amounts of rain will also
continue to accumulate in eastern Puerto Rico. So far, a maximum
sustained wind of 33 mph and a peak wind gust of 51 mph have been
reported at Cyril E. King Airport in Saint Thomas and Luis Munoz
Marin Airport in San Juan early this afternoon, respectively.
Rainfall accumulations totals of 1-2 inches have been observed
during the day, resulting in a gradual saturation of the soils.
Increasing shower activity and additional rounds of heavy rains will
generate localized flash flooding and mudslides, as well as rising
river levels, particularly across mainland Puerto Rico tonight into
Thursday morning. Hazardous marine and coastal conditions will
continue as the system streams west-northwestward across the eastern
Caribbean and south of the local islands this evening. These
conditions are forecast to persist through Friday morning.

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

* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
extensive impacts across Puerto Rico and the US Virgin Islands.
Potential impacts include:
    - Major rainfall flooding may prompt many evacuations and rescues.
    - Rivers and tributaries may rapidly overflow their banks in
      multiple places. Small streams, creeks, canals, arroyos, and
      ditches may become dangerous rivers. In mountain areas,
      destructive runoff may run quickly down valleys while
      increasing susceptibility to rockslides and mudslides. Flood
      control systems and barriers may become stressed.
    - Flood waters can enter many structures within multiple
      communities, some structures becoming uninhabitable or washed
      away. Many places where flood waters may cover escape routes.
      Streets and parking lots become rivers of moving water with
      underpasses submerged. Driving conditions become dangerous.
      Many road and bridge closures with some weakened or washed out.

* WIND:
Protect against dangerous wind having possible significant impacts
across Puerto Rico and the U.S. Virgin Islands. Potential impacts in
this area include:
    - Some damage to roofing and siding materials, along with damage
      to porches, awnings, carports, and sheds. A few buildings
      experiencing window, door, and garage door failures. Mobile
      homes damaged, especially if unanchored. Unsecured lightweight
      objects become dangerous projectiles.
    - Several large trees snapped or uprooted, but with greater
      numbers in places where trees are shallow rooted. Several
      fences and roadway signs blown over.
    - Some roads impassable from large debris, and more within urban
      or heavily wooded places. A few bridges, causeways, and access
      routes impassable.
    - Scattered power and communications outages, but more prevalent
      in areas with above ground lines.

Also, protect against hazardous wind having possible limited impacts
across Puerto Rico and the U.S. Virgin Islands.

* SURGE:
Protect against locally hazardous surge having possible limited impacts
across Puerto Rico and the U.S. Virgin Islands. Potential impacts in
this area include:
    - Localized inundation with storm surge flooding mainly along
      immediate shorelines and in low-lying spots, or in areas
      farther inland near where higher surge waters move ashore.
    - Sections of near-shore roads and parking lots become overspread
      with surge water. Driving conditions dangerous in places where
      surge water covers the road.
    - Moderate beach erosion. Heavy surf also breaching dunes, mainly
      in usually vulnerable locations. Strong rip currents.
    - Minor to locally moderate damage to marinas, docks, boardwalks,
      and piers. A few small craft broken away from moorings.

* 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:

Do not return to evacuated areas until hazardous winds
diminish and flood waters abate.

* 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 11 PM AST, or sooner if conditions
warrant.

$$
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