#4252 Postby cycloneye » Tue Sep 05, 2017 2:54 pm
Hurricane Irma Local Statement Intermediate Advisory Number 26A
National Weather Service San Juan PR AL112017
211 PM AST Tue Sep 5 2017
This product covers PUERTO RICO AND THE US VIRGIN ISLANDS
**POTENTIALLY CATASTROPHIC CATEGORY 5 HURRICANE IRMA HEADING TOWARD THE
LEEWARD ISLANDS**
NEW INFORMATION
---------------
* CHANGES TO WATCHES AND WARNINGS:
- None
* CURRENT WATCHES AND WARNINGS:
- A Hurricane 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 470 miles east-southeast of San Juan PR or about 400
miles east-southeast of Saint Thomas VI
- 16.9N 59.1W
- Storm Intensity 185 mph
- Movement West or 275 degrees at 14 mph
SITUATION OVERVIEW
------------------
Irma has increased in strength to Category 5 with winds of 185 mph and
is expected to continue as a potentially catastrophic hurricane as it
approaches Puerto Rico and the U.S Virgin Islands late Wednesday
morning. Irma is forecast to move northeast of the local islands, but
through the local outer Atlantic waters Wednesday afternoon through
early Thursday Morning. Irma is expected cause dangerous winds, storm
surge, rip currents and rainfall impacts across the local islands.
Hurricane force wind gusts are possible across the Northern U.S. Virgin
Islands, Culebra, Vieques and Northeast Puerto Rico with strong
tropical force winds likely. The rest of the area is likely to
experience tropical storm force winds. Wind gusts with hurricane force
wind are likely at higher elevations. Rainfall accumulations between 4
to 8 inches with isolated amounts over 12 are likely Wednesday through
Friday.
POTENTIAL IMPACTS
-----------------
* WIND:
Protect against life-threatening wind having possible catastrophic
impacts across the across the northern U.S. Virgin Islands, Culebra and
the northeast quadrant of Puerto Rico. Potential impacts in this area
include:
- Structural damage to sturdy buildings, some with complete roof
and wall failures. Complete destruction of mobile homes. Damage
greatly accentuated by large airborne projectiles. Locations
may be uninhabitable for weeks or months.
- Numerous large trees snapped or uprooted along with fences and
roadway signs blown over.
- Many roads impassable from large debris, and more within urban
or heavily wooded places. Many bridges, causeways, and access
routes impassable.
- Widespread power and communications outages.
Also, protect against life-threatening wind having possible extensive
impacts across all islands.
* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
extensive impacts across all the 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.
Protect against dangerous rainfall flooding having possible
significant impacts across all impacts.
* SURGE:
Protect against life-threatening surge having possible devastating
impacts across all islands. Potential impacts in this area include:
- Widespread deep inundation, with storm surge flooding greatly
accentuated by powerful battering waves. Structural damage to
buildings, with many washing away. Damage greatly compounded
from considerable floating debris. Locations may be
uninhabitable for an extended period.
- Near-shore escape routes and secondary roads washed out or
severely flooded. Flood control systems and barriers may become
stressed.
- Extreme beach erosion. New shoreline cuts possible.
- Massive damage to marinas, docks, boardwalks, and piers.
Numerous small craft broken away from moorings with many lifted
onshore and stranded.
Also, protect against life-threatening surge having possible
significant to extensive impacts across all the islands.
Also, protect against locally hazardous surge having possible limited
impacts across .
* 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:
WATCH/WARNING PHASE - For those under evacuation orders, leave as soon
as practical with a destination in mind. Gas up your vehicle well
ahead of time. Be sure that you take all essential materials from your
emergency supplies kit. Let others know where you are going and when
you intend to arrive.
WATCH/WARNING PHASE - If evacuating the area, stick to prescribed
evacuation routes. Look for additional traffic information on roadway
smart signs and listen to select radio channels for further travel
instructions. Drivers should not use cell phones while operating
vehicles.
WATCH/WARNING PHASE - For those not under evacuation orders,
understand that there are inherent risks to evacuation (such as
traffic congestion, accidents, and driving in bad weather), so
evacuate only if necessary. Help keep roadways open for those that
are under evacuation orders.
WATCH/WARNING PHASE - 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.
WATCH/WARNING PHASE - If evacuating away from the area or relocating
to a nearby shelter, leave early before weather conditions become
hazardous.
IMMINENT/ONGOING PHASE - Do not return to evacuated areas until
hazardous winds diminish and flood waters abate.
RECOVERY PHASE - Do not return to evacuated areas until it is safe.
Listen for the all-clear signal from local authorities.
* OTHER PREPAREDNESS INFORMATION:
Now is the time to bring to completion all preparations to protect
life and property in accordance with your emergency plan.
Outside preparations should be wrapped up as soon as possible before
weather conditions completely deteriorate. Any remaining evacuations
and relocations should be expedited before the onset of tropical
storm force wind.
If you are relocating to safe shelter, leave as early as possible. If
heading to a community shelter, become familiar with the shelter
rules before arrival, especially if you have special needs or own a
pet. Take essential items with you from your Emergency Supplies Kit.
Check the latest weather forecast before departing.
Failure to adequately shelter may result in serious injury or loss of
life. Always heed the advice of local officials and comply with any
orders that are issued. Remember, during the storm 9 1 1 Emergency
Services may not be able to immediately respond if conditions are
unsafe. This should be a big factor in your decision making.
Check-in with your emergency points of contact among family, friends,
and workmates. Inform them of your status and well-being. Let them
know how you intend to ride out the storm and when you plan to
check-in again.
Keep cell phones well charged and handy. Also, cell phone chargers
for automobiles can be helpful after the storm. Locate your chargers
and keep them with your cell phone.
In emergencies it is best to remain calm. Stay informed and focused
on the situation at hand. Exercise patience with those you encounter.
Be a Good Samaritan and helpful to others.
If relocating to a nearby shelter or to the home of a family member
or friend, drive with extra caution, especially on secondary roads.
Remember, many bridges and causeways will be closed once higher winds
arrive. Also, if you encounter water covering the road, seek an
alternate route. Always obey official road signs for closures and
detours.
If you are a visitor and still in the area, listen for the name of
the city or town in which you are staying within local news updates.
Be sure you know the name of the county or parish in which it
resides. Pay attention for instructions from local authorities.
Closely monitor NOAA Weather radio or other local news outlets for
official storm information. Be ready to adapt to 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 530 PM AST, or sooner if conditions
warrant.
$$
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