5:30 p.m. update: Austin temperatures hit 100 degrees on Sunday, matching the heat record set on this date in 2008, the National Weather Service said.
Although temperatures at Austin-Bergstrom International Airport only reached 99 degrees on Sunday, the reading broke the daily heat record of 98, which had been set in 2011, one of Austin’s warmest years on record.
Normally, temperatures peak around 90 degrees at this time of year, according to weather service climate data.
3:50 p.m. update: Doppler radar indicates storm cells forming over the western Hill Country, north of Frederickburg and over Marble Falls.
The isolated showers and thunderstorms will be capable of producing small hail, gusty winds stronger than 30 mph and brief heavy downpours over the next few hours, the National Weather Service says.
Forecasters also are warning residents about frequent lightning with these storms. They recommend seeking shelter in a building or vehicle.
“If on or near Lake Lyndon B. Johnson, get out of the water and move indoors or inside a vehicle,” the weather service says. “Remember, lightning can strike out to
10 miles from the parent thunderstorm.”
Earlier: Austin matched record temperatures Saturday, reaching 101 degrees just after 3 p.m. But Sunday’s forecast for Austin includes a 40 percent chance of showers and thunderstorms, mainly after 1 p.m. Expect partly sunny skies with a high near 96 degrees, the National Weather Service says.
Heat index values could reach as high as 107 degrees, forecasters say.
At 9 a.m., Austin’s main weather station near Camp Mabry already recorded temperatures as high as 81 degrees under mostly cloudy skies.
The weather service also calls for a 30 percent chance of showers and thunderstorms at night with mostly cloudy skies and a low of 76 degrees.
Here is a look at the extended forecast:
Monday: A 20 percent chance of showers and thunderstorms; Partly sunny, with a high near 96 degrees, lows around 74 degrees and a heat index values as high as 104 degrees.
Tuesday: Sunny and hot, with a high near 98 and low around 75 degrees.
Wednesday: Sunny and hot with a high near 98 and low around 76 degrees.
Thursday: Mostly sunny and hot with a high near 97, low around 76 degrees.
Friday: Sunny and hot with a high near 97, low around 75 degrees.
Saturday: Sunny and hot with a high near 97 degrees.