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A disturbance moving northwest across the Gulf of Mexico toward the southern tip of Texas could become a tropical depression by landfall on Friday night.
Tropical moisture on Friday night should turn into widespread showers during the day on Saturday. Forecasters said about half the Alamo City area should see some rain.
Some heavier showers could not be ruled out, but overall accumulations of precipitation were expected to remain below half-an-inch with isolated pockets of 1 or 2 inches. The Weather Prediction Center posted a Level 1 out of 4 risk for excessive rainfall that could lead to flash flooding across the Coastal Plains, I-35 corridor, and Hill Country.
The rain and cloud cover should keep temperatures below 100 degrees this weekend. The San Antonio area hit 100 on Wednesday and was expected to come close again on Thursday and Friday. Heat indices of 103 and 104 were expected Thursday and Friday, respectively.
The San Antonio area remains in its second worst drought, lingering into its sixth summer. The only drought that was worse was the drought of the 1950s.
The area received steady rains in June and July, but the month of August in San Antonio is usually hot and dry until a tropical disturbance blows in.
For the year, San Antonio is actually about one inch above the year-to-date average for the city. Since Jan. 1, slightly more than 20 inches of rain have fallen at San Antonio International Airport, home of the city's official rain gauge.
