San Antonio Hurricane Harvey: August 26 Forecast & Path

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National Weather Service

The radar in San Antonio late Saturday morning from Hurricane Harvey.

Hurricane Harvey has dissipated from a Category 4 to a Category 1 storm, but there are dangers to the San Antonio area from strong wind speeds and heavy rainfall.

The hurricane made landfall on August 25 in Rockport, Texas, causing damage and injuring at least 10 people, and was moving by about 75 mph as of the next day. Here’s the radar from San Antonio shortly before noon on Saturday, August 26:

There are twin concerns: Flooding and wind speeds, including the possibility of tornadoes developing.

The National Weather Service’s Saturday hazardous weather warning for the area reports, “Hurricane Harvey will meander over southeastern Texas through the middle of next week. This slow movement will produce as much as 3 feet of rainfall in places. This will produce devastating flooding. Winds are continuing to decrease and Harvey is likely to become a tropical storm later today. However, rainfall is the primary threat from Harvey. Remember, ‘Turn Around, Don’t Drown.’”

You can see up-to-the-minute radar for San Antonio here.

Track the hour-by-hour forecast for San Antonio here.

See an updated watch and warning map here.

The August 26 hazardous weather outlook for San Antonio from the National Weather Service reads as follows:

Hurricane Harvey will continue to slowly move into southeastern portions of South Central Texas later this morning where it is currently predicted to stall. Harvey will continue to weaken over land and fall below hurricane force later today as it moves into DeWitt County. However, widespread heavy rainfall capable of producing river and flash flooding will occur well to the north and east of Harvey. This is just the beginning of a life-threatening and catastrophic heavy rainfall event expected east of I-35 and I-37 that may continue into the middle of next week.

A Hurricane Warning is in effect for 70 to 80 mph winds across Karnes and Dewitt Counties. A Tropical Storm Warning is in effect for winds of 35 to 50 mph across Atascosa, Bastrop, Bexar, Caldwell, Fayette, Gonzales, Guadalupe, Lavaca, and Wilson Counties. A Wind Advisory is in effect for Bandera, Blanco, Frio, Kendall, Lee, Medina, Travis, and Williamson Counties for winds of 25 to 35 mph with gusts to 40 mph in the stronger rainbands.

A Flash Flood Watch is in effect through Tuesday evening for counties along and east of a line from Georgetown to Comfort to Jourdanton.

There is a low risk of brief tornadoes east of I-35 and I-37 today. A Tornado Watch is currently in effect for Fayette, Lavaca, and Lee Counties until 1 pm Saturday.

Here’s a wind speed chart for August 26:

Here’s a list of the highest rainfall amounts for August 26:

Here’s an updated map of Bexar County road closings and flooding.

The National Weather Service detailed forecast for San Antonio reads as follows:

This Afternoon

“Tropical storm conditions expected. Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 80. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.”

Tonight

“Tropical storm conditions expected. Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 73. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.”

Sunday

“Tropical storm conditions expected. Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 81. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.”

Sunday Night

“Showers and thunderstorms. Low around 72. Breezy, with a north northeast wind 20 to 25 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.”

Monday

“Showers and thunderstorms likely. Cloudy, with a high near 82. North wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.”

Monday Night

“Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 71. North northeast wind 10 to 15 mph. Chance of precipitation is 60%.”

Tuesday

“A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. North wind 10 to 15 mph, with gusts as high as 20 mph.”

Tuesday Night

“A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. North wind around 15 mph, with gusts as high as 20 mph.”

Wednesday

“A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. North wind around 15 mph.”

Wednesday Night

“A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.”

Thursday

“A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.”

Thursday Night

“A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.”

Friday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.”

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