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NWS CORPUS CHRISTI (CALHOUN, GOLIAD, VICTORIA COUNTIES) 5 PM Update – Hurricane Harvey is Forecast to be a Major Hurricane When it approaches the mid Texas Coast Friday Night! Life Threatening Surge and Freshwater flooding Expected!

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Harvey Forecast to be a Major Hurricane when it approaches the middle Texas Coast Friday Night

Life threatening Storm Surge and Freshwater Flooding Expected

Here is the latest information as of 5 PM concerning Hurricane Harvey. Harvey continues to strengthen and is expected to become a major hurricane before landfall Friday Night. Hurricane and Storm Surge Warnings are in effect for the Mid Texas Coast. Preparations should be rushed to completion in preparation for this major hurricane! Preparations should be made to plan for devastating to catastrophic wind impacts. Structural damage to sturdy buildings, some with complete roof and wall failure are possible. Life threatening storm surge is expected with peak storm surge values of 6 to 12 feet above ground level. After landfall, we are most concerned about this storm stalling or meandering over the area for several days which will result in life threatening, devastating, and record flooding. Rainfall amounts of 15 to 25 inches with isolated areas receiving up to 35 inches possible are expected!

Summary of 5 PM Information

Hurricane Warning in effect from Port Mansfield to Sargent including Corpus Christi, Rockport, Port Lavaca and surrounding areas

Storm Surge Warning in effect from Port Mansfield to High Island including Corpus Christi, Rockport, Port O’Connor and surrounding areas

Location: 24.7 N 93.9 W or 305 Miles SE of Corpus Christi TX

Maximum Sustained Winds: 85 mph
Present Movement: NNW at 10 mph
Minimum Central Pressure: 976 mb

Additional Information Resources:
National Hurricane Center: www.hurricanes.gov
NWS Corpus Christi: www.weather.gov/corpuschristi

New Local Tropical Webpage: http://www.weather.gov/srh/tropical?office=crp

Be safe!
Sincerely,
John

National Weather Service
Corpus Christi, TX

NWS Austin-San Antonio (DE WITT, FAYETTE, GONZALES, and LAVACA) Hurricane Harvey Update – 5 PM Aug 24

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Good afternoon,

Key Points:

  • A life-threatening heavy rainfall event is expected across inland portions of South Central Texas.
  • Average rainfall amounts of 10-20 inches are expected along and east of I-35 Friday through Tuesday. This includes the cities of San Antonio and Austin. A Flash Flood Watch is in effect for these areas.
  • Isolated higher totals in excess of 25 inches are possible near and south of I-10.
  • Areas outside the Flash Flood watch area, in the southern and eastern Hill Country, could see 5-10 inches with isolated higher amounts.
  • Devastating mainstem river flooding lasting many days is possible east of I-35 in the Colorado, Guadalupe, and San Antonio river basins.
  • 70-80 mph winds are expected for counties in the Hurricane Warning. Large trees could be snapped, power lines downed, and damage to homes could occur. Power and communication outages are likely.
  • 40-50 mph winds are expected within the area now under a Tropical Storm Warning with gusts to 60 mph. Damage to trees and power lines are possible, leading to scattered power outages.
  • There remains uncertainty in the forecast track and intensity of Harvey across Texas. Only small changes to the track, intensity, and/or forward speed of Harvey could result in large changes to flooding and wind impacts across South Central Texas. The heavy rainfall threat could be expanded farther west and north with any of these changes.

Update Since Last Briefing:

  • Rainfall amounts increased slightly: 10-20″, isolated amounts in excess of 25″ (see below for areal details).
  • Flash Flood Watch extended through Monday morning now includes the Austin metro area.

Threats & Impacts:

Note: Changes in track and intensity may dramatically change the impacts and locations of these threats/impacts. 

Rainfall (Moderate to High Confidence) 

  • 10-20 inches of rain east of Interstate 35 Friday afternoon through Tuesday. Isolated totals that may exceed 25 inches near and south of I-10. Life-threatening flash flooding and devastating river flooding is expected across this area.
  • Areas outside the watch area, across the southern and eastern Hill Country, could see 5-10 inches with isolated higher amounts.
  • Rainfall totals of less than 2 inches is expected across the Western Hill Country and Rio Grande.

Winds: (Moderate Confidence) 

Hurricane force winds of 70-80 mph are possible across areas currently in the Hurricane Warning. Tropical storm force winds of 40 to 50 mph, with gusts to 60 mph, are possible across the area currently under a Tropical Storm Warning. These winds will be most likely on Saturday, but they may arrive as early as Friday afternoon.

Tornadoes: (Low Confidence) 

There may be a marginal to slight risk of tornadoes mainly across southeast areas in the Coastal Plains. These small tornadoes are typically very short-lived and can spin-up quickly during the daytime or nighttime hours.

Timing and Overview:

Overview:

Harvey strengthened to a hurricane earlier today and is expected to make landfall as a major hurricane between Corpus Christi and Port O’Connor Friday night. Harvey is expected to then weaken inland over South Texas over the weekend, slowing its forward speed and possibly stalling or meandering. A life-threatening flash flooding threat is expected along with devastating mainstem river flooding inland over portions of South Central Texas. It should continued to be stressed that there is uncertainty with the track and speed of Harvey. Small changes to the track, intensity, and/or forward speed of Harvey will result in large changes to flooding and wind impacts across South Central Texas. The heavy rainfall threat could be expanded farther west and north with any of these changes.

At this time, we urge you to remain closely aware of the changes to the forecast over the next 24 hours by monitoring the National Hurricane Center (www.hurricanes.gov) and your local forecast (www.weather.gov/sanantonio).

 

Additional Information Resources:


Sincerely,

Jason Runyen

NWS Austin / San Antonio

Weather Forecast Office

Texas Department of Public Safety urges citizens to be prepared as the threat of flooding increases with the onset of Tropical Depression Harvey. DPS Urges Preparedness as Flood Threat Increases

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SAN ANTONIO – The Texas Department of Public Safety (DPS) is urging Texans along the Gulf Coast region and nearby counties to prepare for severe weather, strong winds and localized flooding through the weekend.

Tropical Depression Harvey has the potential to produce large amounts of rainfall over the next several days. Flooding and high winds could cause scattered power outages, fallen trees and minor property damage.

DPS is closely monitoring the weather conditions. If severe weather creates hazardous driving conditions, roadways will be closed for the safety of the motoring public.

Citizens should stay tuned to local television and radio stations for weather and traffic updates.

TDEM Hurricane Awareness

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June 1 through November 30 is hurricane season. Although Texas coastal communities face the greatest threat from hurricane events, inland communities can also be impacted. Stay weather aware, and learn how to protect yourself and your family before, during, and after a hurricane.

Hurricane Threats and Hazards

Hazards associated with hurricanes include storm surge flooding, inland flooding, destructive winds, tornadoes, and high surf with strong rip currents.

Bolivar Peninsula, Texas in 2008 after Hurricane Ike storm surge

Hurricanes are powerful storms characterized by intense winds that begin at 74 mph and can reach up to 157mph or higher.  However, despite the destructive capability of hurricane force winds, water is the deadliest component of hurricane events. According to the National Hurricane Center, 75 percent of all tropical cyclone related fatalities between 1963 and 2012 were due to storm surge and rain induced flooding. Remember flooding events can last for days following a hurricane’s initial landfall.

Tornadoes are also a common occurrence with hurricanes, posing a significant threat for both coastal and inland communities. Hurricane Beulah, which made landfall in southeast Texas in 1967, spawned 115 tornadoes. The National Weather Service reports tornadoes associated with Hurricane Allen, 1980, caused $100 million dollars in damages to the Austin area.

Hurricane Preparedness Tips

To help protect your family, home, and business during hurricane events keep the following preparedness tips in mind:

  • Board up doors and windows with plywood or install storm shutters. Keep in mind that winds are stronger at higher elevations, such as high-rise apartments or condos.
  • Bring in outdoor objects that could become deadly missiles, such as patio furniture, hanging plants, trash cans, gardening tools and barbecues.
  • If your home is vulnerable to rising water, move furniture and valuables to a higher level.
  • Before evacuating, cut off your electricity and turn off the gas. Downed electrical wires and broken gas pipes can be deadly and cause serious property damage. Make a final walk-through inspection of your home before leaving.
  • Moor boats securely or move them to designated safe areas well in advance of hurricanes. Do not try to tow a trailer or boat in high winds.
  • Assemble a family emergency supplies kit and have it ready to go at a moment’s notice. Find a list of suggested items for emergency supplies kits here.
  • When officials recommend or order an evacuation, leave. Do not try to ride out a hurricane in a high-risk area. Seek shelter inland with family or friends, at a hotel or designated shelter. Notify relatives and friends of your plans, and confirm hotel reservations.
  • Find out where shelters are located along your route in case clogged roads prevent you from reaching your destination.
  • Look at the evacuation maps for your area ahead of time.

Evacuation questions?

Evacuation questions?

Visit our evacuation Q&A page for more information.

Time to evacuate? Don’t forget to plan for all of your family members, including children, seniors, those with functional and access needs, and your pets!

Additional Resources

For more information about preparing for hurricanes, please visit:

TS Harvey Update from NWS Austin-San Antonio includes information for DE WITT, FAYETTE, GONZALES, and LAVACA Counties.

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Headline:

…Tropical Storm Watches in effect for southeast portions of South Central Texas…

…Tropical Storm Watches in effect for….Fayette, Gonzales, Wilson, Karnes, DeWitt, and Lavaca Counties…

Area of Concern:

Primarily areas east of Interstate 37 and east of Interstate 35.  This includes the following counties of… Fayette, Gonzales, Wilson, Karnes, DeWitt, and Lavaca.

Word of caution…While the areas listed above will likely see the biggest impacts (Wind and Rain) from Harvey, small changes in the track/intensity, may push the impacts and tropical watches/warnings farther west to possibly include the I-35 corridor and the Austin-San Antonio metro areas.

Threats & Impacts:

Note…a change in track and intensity may dramatically change the impacts and locations of these threats/impacts. 

Rainfall:  3-6 inches of rain east of Interstate 35 with isolated totals that may exceed 10 inches in the Tropical Storm Watch areas especially across the far eastern areas.  Areas along and west of I-35 could see 1-3 inches.   Flash Flooding and River Flooding is possible mainly across the Tropical Storm Watch area.

Winds:  Tropical storm force winds of 40 to 50 mph are possible across the Watch area, with gusts that could exceed 60 mph.  Areas to the west along the I-35 corridor may experience some low end tropical storm force wind gusts if bands push farther west.

Tornadoes:  There may be a slight risk of tornadoes mainly along rain bands in the front right quadrant of landfall. These small tornadoes can happen day or night.

Timing and Overview:

Overview:

The remnants of Harvey have reformed into a tropical depression just west of the Yucatan in the Bay of Campeche.  Over the next couple of days Harvey is expected to strengthen into a strong Tropical Storm and make landfall along the middle Texas coast.  On the current forecast track, tropical storm force winds are expected to affect southeast sections of South Central Texas on Friday and Saturday and have thus issued Tropical Storm Watches for this area (see County list above).  As with any tropical system, flooding rainfall and strong winds will be the primary threat.

There remains uncertainty on exactly where the system could impact along the Texas coast and locations inland. As such please know that later updates may change the impact areas and threats.  The system is forecast to move very slowly over SE Texas over the weekend.

It should be stressed that there is the potential for much higher rainfall amounts across South Central Texas if the center of system ends up tracking farther west and much lower amounts if the center of the system tracks toward the Upper Texas Coast.

At this time we urge you to remain closely aware of the changes to the forecast over the next 24-48 hours by monitoring the National Hurricane Center (www.hurricanes.gov) and your local forecast (www.weather.gov/sanantonio).  As this system We expect greater detail and confidence in the forecast tomorrow.

Confidence:

Moderate for location and impacts of Harvey.

Additional Information Resources:


Sincerely,

Paul Yura
NWS Austin / San Antonio

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