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NWS Houston – Galveston Update: Monitoring Gulf of Mexico for Possible Development, No Current Threat to Texas

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Good afternoon,
Bottom Line

The tropics remain active this afternoon and are expected to remain active over the next week. While we are currently monitoring Hurricane Irma, an area of low pressure in the Bay of Campeche, and a wave in the central Atlantic, none of these systems pose a threat to Southeast Texas at this time.

Overview
Generally dry conditions are expected through the remainder of today, with isolated to scattered showers possible Tuesday into early Wednesday along and ahead of a cold front moving off the area. This cold front is expected to sweep off the Upper Texas coast Wednesday morning and push the area of low pressure in the Bay of Campeche into Mexico, with no impacts expected in Southeast Texas at this time.

Hurricane Irma continues to approach the Leeward Islands this afternoon and is expected to move west to west-northwest towards Florida over the next few days. No impacts are expected in Southeast Texas from Hurricane Irma at this time.

Resources
Melissa Huffman
National Weather Service – Houston/Galveston, TX
Twitter: @NWSHouston
Facebook: NWSHouston

TTR Weekend Weather Update

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As of 11:30 am Friday, the flood warning continues for the Guadalupe River Near Cuero Affecting De Witt County, Guadalupe River At Victoria affecting Victoria County, Guadalupe River Near Bloomington affecting Calhoun, Refugio and Victoria Counties, Lavaca River Near Edna, and San Bernard River Near East Bernard. River stage forecasts are based on observed rainfall along with predicted rain for the next 12 hours. If actual rainfall varies
from forecast values, forecast river stages will vary. Do not drive automobiles through flooded areas. Remember, 18 inches of water or less can carry away most vehicles, including trucks. If you see flood waters or come upon a flooded roadway, remember to turn around and do not drown. For the latest river stages and forecasts visit www.srh.noaa.gov/ewx.

Another day of dry and warm temperatures Saturday. Slight rain chances return Sunday afternoon and continue early next week. Rain should be mainly confined to the north and east except Tuesday night and Wednesday morning when a cold front moves through the area.

Tonight
Mostly clear. Lows in the upper 60s. Southeast winds 5 mph shifting to the south after midnight.

Saturday
Mostly sunny in the morning then becoming partly cloudy. Highs in the lower 90s. Southeast winds 5 to 10 mph.

Saturday Night
Partly cloudy. Lows around 70. South winds 5 to 10 mph.

Sunday
Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs around 90. East winds 5 to 10 mph.

Sunday Night
Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the upper 60s.

Labor Day
Partly cloudy with a 30 percent chance of showers and thunderstorms. Highs in the upper 80s.

Monday Night
Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows around 70.

Looking Ahead:

For Texas highway conditions, traffic information, please visit www.DriveTexas.org
*To view current TxDOT Highway Conditions by specific road conditions, by county, or by roadway CLICK HERE.
**Please monitor  the TxDOT Yoakum Twitter feed for the latest updates for the TTR Listening Area, or call TxDOT’s automated road conditions hotline at 1-800-452-9292 for the latest updates on the road closures.

Have a great Labor Day Weekend!

NWS Austin-San Antonio (De Witt, Fayette, Gonzales, Lavaca) Hurricane Harvey Update – 4 PM Aug 25

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Key Messaging Points:

  • A life-threatening and catastrophic heavy rainfall event is expected east of I-35 and I-37.
  • Average rainfall amounts of 10-20 inches are expected east of I-35 and I-37 Tonight through Wednesday. Isolated higher totals in excess of 30 inches are possible near and south of the I-10 corridor.
  • Along the I-35 corridor and across the eastern Hill Country, including the City of San Antonio and Austin, 6-12 inches with isolated higher totals are possible.
  • A tight rainfall gradient is expected on the western and northern edge of Harvey’s precipitation shield, near or along the I-35 corridor. Small shifts in the forecast track of Harvey, and where it stalls this weekend into early next week, could result in very large differences in rainfall totals.
  • Catastrophic main stem river flooding lasting many days is possible east of I-35 and I-37 in the Colorado, Guadalupe, and San Antonio river basins.
  • Tropical Storm Force winds arriving this evening in rain bands.
  • 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 in rain bands. This includes San Antonio to San Marcos areas.  Damage to trees and power lines are possible, leading to scattered power outages.
  • For Austin 20-30 mph with gusts in excess of 40 mph in rain bands.
  • There is a marginal risk for tornadoes east of a I-35 and I-37 through Saturday. These small tornadoes are typically very fast moving and short-lived.

Please reference attached pdf for supplemental graphics.

Update Since Last Briefing:

  • Harvey is high end Category 3 hurricane approaching landfall along the Mid Texas Coast.
  • Forecast track has slowed further inland across South Texas.
  • Flash Flood Watch extended through Tuesday.

Overview:

Hurricane Harvey is approaching the Mid Texas Coast and is expected to make landfall this evening near or just north of Corpus Christi. Outer rain bands has already developed inland across South Central Texas. Widespread rainfall and tropical storm force winds will arrive inland across South Central Texas later tonight and continue Saturday. Harvey is still expected to weaken and stall inland over South Texas over the weekend. Models have slowed Harvey even more into early next week, prolonging the threat for life-threatening and catastrophic flooding east of I-35 and I-37.

Next Briefing

By 11 PM Friday

Additional Information Resources:


Sincerely,

Jason Runyen

NWS Austin / San Antonio

Weather Forecast Office

Update from LCRA: Lakes Bastrop and Fayette closed

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  • LCRA has closed lakes Bastrop and Fayette to recreational boating because of dangerous conditions caused by Hurricane Harvey.
  • LCRA is closely monitoring the storm and has staff on duty round-the-clock at the River Operations Center and each of the dams along the Highland Lakes in case floodgate operations are needed.
  • See the LCRA Hydromet for rainfall totals, lake levels and streamflow throughout the lower Colorado River basin.
  • Matagorda Bay Nature Park, Oak Thicket Park and Park Prairie also are closed. For more information, see the LCRA Park Alerts page.

 

Clara Tuma
Lower Colorado River Authority | Public Information Officer 

TTR Weekend Weather Update

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The latest update on Hurricane Harvey includes an expansion of the Tropical Storm Warning for Comal and Hays Counties. In addition 6- 12 inches of rainfall is possible along the I-35 corridor. Higher totals up to 10-20 inches are possible east of I-35.

Hurricane force winds are expected to extend as far north as the I- 10 corridor (Red/Pink) while Tropical Storm force winds could extend as far north as Austin. This could result in power outages where these winds occur.

Widespread heavy rainfall continues to be the main threat with Harvey. Forecast rain totals through Tuesday are expected to range from 10-20 widespread east of I-35. Isolated amounts as high as 25 inches are possible as well, especially south of I-10 and east of I- 37. Widespread flash flooding impacts are expected. For the I-35 corridor 6-12 inches are possible.

With flash flooding possible over the weekend due to Harvey, it is very important to practice flash flood safety. Here are three simple steps for staying safe in flash flood situations.

As of 3:00 pm CDT –

Storm Surge Warning

  • LOCATIONS AFFECTED
  • Corpus Christi
  • Port Aransas
  • Robstown
  • Victoria
  • Bloomington
  • Rockport
  • Holiday Beach
  • Bayside
  • Refugio
  • Woodsboro
  • Port Lavaca
  • Port OConnor
  • Seadrift
  • Portland
  • Ingleside
  • Aransas Pass

Hurricane Warning

…HURRICANE WARNING REMAINS IN EFFECT…
Aransas, Bee, Calhoun, Goliad, De Witt, Jackson, Jim Wells, Karnes, Live Oak, Nueces, Refugio, San Patricio, and Victoria Counties.

Tropical Storm Warning

Atascosa, Austin, Bastrop, Bexar, Caldwell, Comal, Colorado, Duval, Fayette, Gonzales, Guadalupe, Hays, Lavaca, McMullen, Wharton, and Wilson Counties.

Tornado Watch

ARANSAS, BRAZORIA, CALHOUN, CHAMBERS, FORT BEND, GALVESTON, GOLIAD, HARRIS, JACKSON, JEFFERSON, MATAGORDA, REFUGIO, VICTORIA, AND WHARTON COUNTIES.

 

Flood Warning

The flood warning continues for the following rivers in Texas:

Sandies Creek Near Westhoff Affecting De Witt County
Plum Creek near Luling
Guadalupe River at Gonzales
Guadalupe River Near Cuero
Comal River At New Braunfels
Guadalupe River At New Braunfels Below Comal
San Marcos River below Luling
Blanco River At San Marcos
Colorado River At Bastrop
Colorado River Near Smithville
Colorado River Above La Grange
San Antonio River at Hwy 72 near Runge
Garcitas Creek Near Inez
San Antonio River At Goliad
Coleto Creek At Arnold Road Crossing affecting Goliad and Victoria
Counties
Guadalupe River Near Bloomington
Guadalupe River At Victoria affecting Victoria County

Flash Flood Watch

Flash Flood Watch continues for Atascosa, Bastrop, Bexar, Blanco, Caldwell, Comal, De Witt, Fayette, Gonzales, Guadalupe, Hays, Karnes, Kendall, Lavaca, Lee, Travis, Williamson, and Wilson.

Flash Flood Watch continues for Portions of Southeast Texas and southeast Texas…including
the following counties: Austin…Brazoria…Brazos…Burleson…Chambers…Colorado…Fort Bend…Galveston…Grimes…
Harris…Jackson…Liberty…Matagorda…Montgomery…Waller…Washington and Wharton.

Flash Flood Watch continues for a portion of south Texas, including the following areas, Aransas, Bee, Calhoun, Duval, Goliad, Jim Wells, Kleberg, Live Oak, McMullen, Nueces, Refugio, San Patricio, and Victoria.

Now, your Texas Thunder Radio Weekend Weather Forecast…

Rest Of Today
tropical storm conditions possible. Cloudy with showers and thunderstorms likely. Locally heavy rainfall possible. Highs in the mid 80s. North winds 10 to 15 mph increasing to northeast 20 to 25 mph in the afternoon. Chance of rain 70 percent.
Tonight
tropical storm conditions expected. Showers and thunderstorms. Locally heavy rainfall possible. Lows in the mid 70s. Temperature steady or slowly rising after midnight. East winds 35 to 45 mph. Gusts up to 50 mph increasing to 60 mph after midnight. Chance of rain 100 percent.
Saturday
tropical storm conditions expected. Showers and thunderstorms. Locally heavy rainfall possible. Highs in the lower 80s. Temperature steady or slowly falling in the afternoon. East winds 40 to 50 mph with gusts to around 65 mph. Chance of rain 100 percent.
Saturday Night
tropical storm conditions expected. Showers and thunderstorms. Locally heavy rainfall possible. Lows in the mid 70s. Temperature steady or slowly rising after midnight. Southeast winds 40 to 50 mph with gusts to around 65 mph. Chance of rain 100 percent.
Sunday
tropical storm conditions possible. Showers and thunderstorms. Locally heavy rainfall possible. Highs in the lower 80s. East winds 35 to 45 mph. Gusts up to 60 mph decreasing to 50 mph in the afternoon. Chance of rain 90 percent.
Sunday Night
tropical storm conditions possible. Showers and thunderstorms. Locally heavy rainfall possible. Lows in the lower 70s. Temperature steady or slowly rising after midnight. Chance of rain 80 percent.
Monday
tropical storm conditions possible. Cloudy with showers and thunderstorms likely. Locally heavy rainfall possible. Highs in the lower 80s. Chance of rain 70 percent.
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