UPDATED AT 6:30 PM: Hays County, San Marcos Under Flash Flood Watch, Forecasted 5 – 15 Inches Of Rain

Hazardous Weather Outlook National Weather Service Austin/San Antonio Texas – 5:44 PM CDT Thu Aug 24 2017

Hazardous Weather Outlook National Weather Service Austin/San Antonio Texas – 5:44 PM CDT Thu Aug 24 2017

Flash Flood Watch

Flood Watch

National Weather Service Austin/San Antonio Texas – 430 PM CDT Thu Aug 24 2017

COUNTIES

Hays-Bastrop-Lee-Bexar-Comal-Guadalupe-Caldwell-Fayette-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca

Including the cities of San Marcos, Bastrop, Giddings, San Antonio, New Braunfels, Seguin, Lockhart, La Grange, Pleasanton, Floresville, Karnes City, Gonzales, Cuero, and Halletsville

FLASH FLOOD WATCH NOW IN EFFECT FROM FRIDAY AFTERNOON THROUGH

• MONDAY MORNING…

The Flash Flood Watch is now in effect for

• A portion of south central Texas, including the following areas, Atascosa, Bastrop, Bexar, Caldwell, Comal, De Witt, Fayette, Gonzales, Guadalupe, Hays, Karnes, Lavaca, Lee, and Wilson.

From Friday afternoon through Monday morning

• Copious amounts of rain are expected beginning Friday Afternoon and lasting through at least Monday morning as Tropical Storm Harvey moves onshore. This watch may need to be expanded in time and area over the next several days as Harvey lingers around the area through the weekend into early Monday. Rainfall totals in the watch area through early next week will average 10 to 20 inches along and east of Interstate 35 with isolated amounts in excess of 25 inches possible along and south of Interstate 10.
• Significant flash flooding is possible as Harvey slowly moves or even stalls. Devastating mainstream river flooding is possible east of Interstate 35 and south of Interstate 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

 * STORM INFORMATION:

About 450 miles south-southeast of Austin TX or about 370 miles

Southeast of Cuero TX

24.7N 93.9W

Storm Intensity 85 mph

Movement North-northwest or 330 degrees at 10 mph

Hazardous Weather Outlook National Weather Service Austin/San Antonio Texas – 5:44 PM CDT Thu Aug 24 2017

Llano · Burnet · Williamson · Val Verde · Edwards · Real · Kerr · Bandera ·Gillespie · Kendall · Blanco · Hays · Travis·  Bastrop · Lee · Kinney · Uvalde · Medina · Bexar · Comal·  Guadalupe · Caldwell · Fayette · Maverick · Zavala · Frio · Atascosa · Wilson · Karnes · Gonzales · De Witt · Lavaca · Dimmit

This Hazardous Weather Outlook is for South-Central Texas..

• Tonight

Scattered showers and thunderstorms will continue through this evening. A few storms will be capable of producing locally heavy rainfall, gusty winds, and frequent cloud to ground lightning. Minor flooding is possible.

• Friday through Wednesday

Hurricane Harvey is expected to bring 70 to 80 mph winds in the inland counties of Karnes and Dewitt Counties, where a Hurricane warning is in effect.

A Tropical Storm Warning for winds of 40 to 50 mph is in effect for Atascosa · Bastrop · Bexar · Caldwell · Fayette · Gonzales  · Guadalupe · Lavaca · Wilson.

A Flash Flood Watch is in effect from Friday afternoon through Monday morning across counties along and east of a line from Georgetown to Bulverde to Jourdanton.

As of now, the average rainfall amounts of 10 to 20 inches are forecast near and east of I-35, with isolated higher in excess of 25 inches expected near and south of I-10. This includes the cities of Austin and San Antonio.

Devastating flood impacts are expected to last many days along mainstream rivers east of I-35 and south of I-10.

Additionally, there is a low risk of brief tornadoes east of Interstate 35 Friday evening into the weekend associated with tropical rain bands.

Hurricane Harvey Local Statement Advisory Number 18 — National Weather Service Austin/San Antonio Texas – 4:31 PM CDT Thu Aug 24 2017

COVER SOUTH CENTRAL TEXAS

**Hurricane Harvey expected to bring a life-threatening heavy rainfall event across South Central Texas**

NEW INFORMATION

* CURRENT WATCHES AND WARNINGS:

A Tropical Storm Warning is in effect for Atascosa · Bastrop · Bexar · Caldwell · Fayette · Gonzales · Guadalupe · Lavaca · Wilson

* A Hurricane Warning is in effect for De Witt and Karnes

* STORM INFORMATION:

About 450 miles south-southeast of Austin TX or about 370 miles

southeast of Cuero TX

24.7N 93.9W

Storm Intensity 85 mph

Movement North-northwest or 330 degrees at 10 mph

OVERVIEW

Harvey continues to strengthen and is now a Category One Hurricane.

Harvey is still moving slowly northwestward in the Gulf of Mexico.

This northwestward movement is expected to continue and Harvey should approach the Texas coast late Friday into Saturday. Confidence continues to increase for tropical storm winds and a significant heavy rainfall event across South Central Texas beginning Friday afternoon and continuing through Tuesday.

Flash flooding and river flooding continue to be the main concerns, mainly within the Tropical Storm Warning and Flash Flood Watch areas.

Hurricane Harvey will produce a life-threatening heavy rainfall event.nStorm total rainfall amounts from Friday through Tuesday could be in the 10 to 20 inch range along and east of Interstate 35 with isolated totals in excess of 25 inches possible over areas south of Interstate 10 as Harvey is expected to stall over the area. Devastating mainstem river flooding is possible east of Interstate 35 and south of Interstate 10.

Additionally, hurricane force winds of 70 to 80 mph will be possible for the counties within the Hurricane Warning, while 40 to 50 mph winds with some gusts to 60 mph will be possible for areas within the Tropical Storm Warning.

The timing of these winds look to arrive Friday night through Saturday morning. There is a low risk of brief tornadoes east of Interstate 35 and south of Interstate 10 Friday evening into the weekend associated with tropical rain bands.

POTENTIAL IMPACTS

* FLOODING RAIN:

Protect against life-threatening rainfall flooding having possible devastating impacts across areas east of Interstate 35 and south of Interstate 10. 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, arroyos and ditches may become raging rivers. In mountain areas, deadly runoff may rage down valleys while increasing susceptibility to rockslides and mudslides. 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.

Protect against life-threatening rainfall flooding having possible limited to extensive impacts across areas along and east of the Interstate 35 Corridor.

* WIND:

Protect against life-threatening wind having possible devastating impacts across areas in the Tropical Storm and Hurricane Warnings mainly east of Interstate 35. 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 limited to extensive impacts across areas along and east of the Interstate 35 Corridor.

* TORNADOES:

Protect against a tornado event having possible limited impacts across areas within the Tropical Storm and Hurricane Warnings. 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.

Elsewhere across SOUTH CENTRAL TEXAS, little to no impact is anticipated.

PRECAUTIONARY/PREPAREDNESS ACTIONS

* OTHER PREPAREDNESS INFORMATION:

Now is the time to bring to completion all preparations to protect life and property in accordance with your emergency plan.

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.

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

Flash Flood Watch

Flood Watch

National Weather Service Austin/San Antonio Texas – 430 PM CDT Thu Aug 24 2017

COUNTIES

Hays-Bastrop-Lee-Bexar-Comal-Guadalupe-Caldwell-Fayette-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca

Including the cities of San Marcos, Bastrop, Giddings, San Antonio, New Braunfels, Seguin, Lockhart, La Grange, Pleasanton, Floresville, Karnes City, Gonzales, Cuero, and Halletsville

FLASH FLOOD WATCH NOW IN EFFECT FROM FRIDAY AFTERNOON THROUGH

MONDAY MORNING…

The Flash Flood Watch is now in effect for

• A portion of south central Texas, including the following areas, Atascosa, Bastrop, Bexar, Caldwell, Comal, De Witt, Fayette, Gonzales, Guadalupe, Hays, Karnes, Lavaca, Lee, and Wilson.

• From Friday afternoon through Monday morning

• Copious amounts of rain are expected beginning Friday Afternoon and lasting through at least Monday morning as Tropical Storm Harvey moves onshore. This watch may need to be expanded in time and area over the next several days as Harvey lingers around the area through the weekend into early Monday. Rainfall totals in the watch area through early next week will average 10 to 20 inches along and east of Interstate 35 with isolated amounts in excess of 25 inches possible along and south of Interstate 10.

• Significant flash flooding is possible as Harvey slowly moves or even stalls. Devastating mainstream river flooding is possible east of Interstate 35 and south of Interstate 10.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.