The National Weather Service has issued a winter storm warning for Tuesday morning through Tuesday evening for Llano, Burnet and Gillsepie counties.

A winter storm watch is in effect Tuesday for Travis, Kerr, Gillespie and Blanco counties.

“A winter storm developing late tonight will bring a wintry mix of precipitation to the Hill Country and much of South Central Texas through Tuesday evening,” the weather service said in a statement. “Rain later tonight will change over to a rain and snow mix after midnight. This will become all snow for the the HIll Country and northern sections of South Central Texas by Tuesday morning.”

The weather service said accumulations through Tuesday evening will range from a half inch to an inch.

“Air temperatures are expected to remain above freezing during this snow event, and soil temperatures are also warm,” the statement said. “Thus snow accumulations will occur mainly in grassy areas.”

The snow will melt to a slushy mix on bridges and roadways, making them slippery, the weather service said.

The chance for rain and snow is 90 percent Tuesday, dropping to 30 percent by Tuesday evening.

The winter weather is expected to last through early Wednesday when drier conditions and slightly higher temperatures are expected, the service said.