[Tropical] Hurricane Local Statement
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emwin at nashvilleweather.net
Fri Aug 25 01:51:34 CDT 2017
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Hurricane Harvey Local Statement Intermediate Advisory Number 19A
National Weather Service Houston/Galveston TX AL092017
151 AM CDT Fri Aug 25 2017
This product covers Southeast Texas
**DANGEROUS HURRICANE HARVEY STRENGTHENING**
NEW INFORMATION
---------------
* CHANGES TO WATCHES AND WARNINGS:
- None
* CURRENT WATCHES AND WARNINGS:
- A Tropical Storm Warning and Storm Surge Watch are in effect
for Chambers and Harris
- A Tropical Storm Warning is in effect for Austin, Colorado,
Fort Bend, Liberty, Waller, and Wharton
- A Storm Surge Warning and Hurricane Warning are in effect for
Jackson and Matagorda
- A Storm Surge Warning and Tropical Storm Warning are in effect
for Brazoria and Galveston
* STORM INFORMATION:
- About 230 miles south of Freeport TX
- 25.6N 95.1W
- Storm Intensity 105 mph
- Movement Northwest or 315 degrees at 10 mph
SITUATION OVERVIEW
------------------
Category 2 Harvey is forecast to continue strengthening and will
most likely become a major hurricane before it makes landfall
somewhere along the Middle Texas Coast Friday. The primary impact from
Harvey still remains very high rainfall amounts that will induce
extreme widespread flooding across southeastern Texas. Tropical storm
force winds, with occasional hurricane force wind gusts, and storm
surge will occur along the coast as early as late Friday afternoon and
persist through Tuesday. Harvey's wind field has expanded, and
therefore higher storm surge can be expected along the Upper Texas
coastline. Coastal flooding will remain an issue throughout the
weekend and possibly into next week as strong onshore winds will keep
water piled up along the coastline. Again, the primary emphasis is on
the high rainfall amounts that will likely lead to widespread and
prolonged flash flooding.
POTENTIAL IMPACTS
-----------------
* FLOODING RAIN:
Protect against life-threatening rainfall flooding having possible
devastating impacts across southeastern Texas.
Potential impacts include:
- Extreme rainfall flooding may prompt numerous evacuations and
rescues.
- Rivers and tributaries may overwhelmingly overflow their banks
in many places with deep moving water. Small streams, creeks,
canals, and ditches may become raging rivers. Flood control
systems and barriers may become stressed.
- Flood waters can enter numerous structures within multiple
communities, some structures becoming uninhabitable or washed
away. Numerous places where flood waters may cover escape
routes. Streets and parking lots become rivers of raging water
with underpasses submerged. Driving conditions become very
dangerous. Numerous road and bridge closures with some weakened
or washed out.
* SURGE:
Protect against life-threatening surge having possible devastating
impacts across the upper Texas coast.
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 locally hazardous surge having possible limited
impacts across Galveston Bay.
* WIND:
Protect against life-threatening wind having possible devastating
impacts across Matagorda Bay from Port O'Connor to Sargent.
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.
* TORNADOES:
Protect against a tornado event having possible limited impacts
across Southeast Texas. 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:
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.
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.
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.
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:
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.
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 Houston/Galveston TX around 430 AM, or sooner if conditions
warrant.
$$
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