Hurricane Harvey San Antonio: Forecast & Path for Aug. 25


hurricane harvey friday, hurricane harvey path, hurricane harvey mapsNational Hurricane Center

Hurricane Harvey on Friday, August 25. The cone contains the probable path of the storm.

Hurricane Harvey is expected to make landfall Friday evening or very early Saturday morning, and San Antonio, Texas is bracing for flash flooding and heavy rainfall.

Here’s the latest Hurricane Harvey update for the morning of August 25:

The National Weather Service reported that a flash flood watch was in effect from Friday afternoon through Monday morning for San Antonio. The flash flood watch was 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, Travis, Williamson, and Wilson” and starts at 1 p.m. August 25.

“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,” the watch reports. “Significant flash flooding is possible as Harvey slowly moves or even stalls. Devastating mainstem river flooding is possible east of Interstate 35 and south of Interstate 10.”

According to San, “The City of San Antonio’s Office of Emergency Management (OEM) has activated the Emergency Operations Center in preparation for rain and inclement weather conditions that may be caused by Hurricane Harvey.”

The city added, “The residents of San Antonio and Bexar County are encouraged to prepare their households for heavy rain and flooding by having enough water and food for at least three days, any necessary medications and an evacuation plan.”

“Residents should be prepared for heavy rain & flooding from Hurricane Harvey…STAY home; STOCK up on food, water & medications; & STAY SAFE!” the City of San Antonio wrote on its official Facebook page.

According to The Houston Chronicle, Hurricane Harvey is poised to be “the first major hurricane to threaten the coast in more than a decade.”

Here’s what you need to know:

Closings & Evacuations

You can see a map of current road closings and flooding in San Antonio here.

KSAT-TV has published a list of San Antonio school and other closings and delays due to Hurricane Harvey. Here’s another full list of closings for San Antonio from KENS5.

The city provided these other information sites:

Residents can sign up to receive text messages from the City of San Antonio by texting COSAGOV to 55000.

The city’s Facebook page is also providing updates.

Category, Warnings, & Windspeeds

According to the National Weather Service, 20+ inches of rain is “possible across Southeast portions of South Central Texas. Flash Flooding likely this weekend.”

The National Hurricane Center wrote in its August 25 update: “Surface observations indicate that tropical-storm-force winds are nearing the coast of Texas. Sustained winds of 31 mph with a gust to 39 mph were recently reported at the Corpus Christi Naval AirStation.”

The summary was as follows:

LOCATION…26.4N 95.9W

“Hurricane Harvey continues to strengthen and will continue to move to the Northwest towards the Texas Coast. Tropical Storm and Hurricane Warnings are now in effect. The storm should impact South Central Texas Friday into the Weekend,” the National Weather Service reports.

This National Weather Service page has a detailed hourly forecast for San Antonio that includes windspeeds and many other data points.

You can check current weather warnings for the San Antonio area here.

According to CNN, Hurricane Harvey “is forecast to become a Category 3 hurricane with winds of at least 111 mph by the time it hits the middle Texas coast late Friday or early Saturday…After hitting Corpus Christi, the storm is expected to stall over the state, forecasters say.”

Hurricane Harvey was expected to make landfall in Texas on Friday night or very early Saturday.

“Hurricane Harvey strengthened to a Category 2 Hurricane overnight and is continuing to strengthen early this morning,” The National Weather Service reported on August 25. “It is still forecast to be a strong Category 3 hurricane at landfall. Landfall is expected Friday night along the middle Texas coast. Life threatening storm surge inundation is expected, and a slow drift of the storm could result in catastrophic flooding possible, especially south of the I-10 corridor.”

Reported the Houston Chronicle, “Forecasters said they expect Harvey to make landfall on the middle Texas coast, between Corpus Christi and Matagorda, by 1 a.m. Saturday, and then stall along the coast through the weekend…The hurricane is supposed to stall near or just inland of the middle Texas coast through the weekend. According to the weather service, the coast is likely to begin experiencing tropical-storm-force winds by 2 p.m. Friday.”

hurricane harvey wind

Hurricane Harvey projected wind arrival times.

The National Hurricane Center reports that hurricane force winds are described as “one-minute average wind speeds of at least 74 mph” and tropical storm force winds are “one-minute average wind speeds of 39-73 mph.”

Path & Radar

san antonio radar

San Antonio, TX radar for Friday morning, August 25.

According to the Houston Chronicle, the storm’s path is “is similar to that of Tropical Storm Allison,” which, in Harris County, “left 22 dead and 30,000 homeless, and caused more than $5 billion in property damages.”

You can see updated San Antonio radar reports here and here.

This page by the National Hurricane Center has a current map that tracks Hurricane Harvey’s path through Texas.

hurricane harvey houston map

National Weather ServiceThis is how the forecast map looked at 9 a.m. on Friday August 25.

Will Hurricane Harvey hit Houston too? The Dallas Morning News reports that’s expected to be one of the hardest hit areas. “People are being advised to reconsider any weekend travel plans they have to the coast, and surrounding areas like Houston, where Harvey is expected to hit the hardest,” the newspaper reported. “Those living in the affected areas are encouraged to secure themselves and their belongings by Thursday night” August 24.

Forecast & Rainfall

hurricane harvey map

Hurricane Harvey rainfall projections.

The National Weather Service warns: “Harvey is forecast to bring torrential rains and dangerous storm surge that have the potential to create a life threatening flooding situation starting Friday.”

You can see another updated weather forecast for San Antonio here on the National Hurricane Center’s website.

See a current graphical forecast map here.

The San Antonio forecast as of Friday, August 25 per the National Weather Service:

Today (August 25)

“Showers and thunderstorms likely, mainly after noon. Cloudy, with a high near 87. Northeast wind 10 to 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.”


“Tropical storm conditions possible. Showers and thunderstorms likely. Some of the storms could produce heavy rainfall. Cloudy, with a low around 75. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.”


“Tropical storm conditions possible. Showers and thunderstorms. Some of the storms could produce heavy rainfall. High near 83. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.”

Saturday Night

“Tropical storm conditions possible. Showers and thunderstorms. Some of the storms could produce heavy rainfall. Low around 73. Chance of precipitation is 80%.”


“Tropical storm conditions possible. Showers and thunderstorms likely. Some of the storms could produce heavy rainfall. Cloudy, with a high near 82. Chance of precipitation is 70%.”

Sunday Night

“A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 74. North northeast wind 10 to 15 mph, with gusts as high as 20 mph.”


“A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85. North northeast wind 15 to 20 mph.”

Monday Night

“A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. North northeast wind around 15 mph, with gusts as high as 20 mph.”


“A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. North wind 10 to 15 mph, with gusts as high as 20 mph.”

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