Dangerous heat index today/tomorrow – relief on the way

Forecast

AUSTIN (KXAN) — We got a brief break in the humidity yesterday. While it was still hot, the heat index was slightly more bearable. That will not be the case today and tomorrow.

Southerly winds returned overnight, and as a result, temperatures are about 5 to 10 degrees warmer this morning than just 24 hours ago. It’s also noticeably more humid out with dew points higher than yesterday as well.

Today will feature a few more clouds than sun. A spot shower or two is possible along and east of I-35, but most remain dry. The combination of heat and humidity today will make the mid 90s feel like 102 to 107 degrees.

Forecast heat index values today
Forecast heat index tomorrow (6/21)

Tomorrow, heat index values will soar even higher to the 105 to 113 degrees range. A Heat Advisory will likely be issued for tomorrow as these heat index values will be dangerous for those who are outside for too long without taking proper precautions such as staying hydrated, taking breaks in the shade, and wearing loose fitting clothing.

Relief comes tomorrow evening (after the hottest part of the day) in the form of a late season cold front. Showers and storms are likely along and ahead of the front, some of which could be strong to severe. The main threats we will be watching out for will be large hail and damaging winds.

Storm Prediction Center Severe Storm Threat for tomorrow evening

We have another brief break in the heat and humidity Tuesday, before both return for the second half of the week.

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Mostly Cloudy

Austin

75°F Mostly Cloudy Feels like 75°
Wind
2 mph E
Humidity
91%
Sunrise
Sunset

Tonight

Warm and humid with increasing clouds.
77°F Warm and humid with increasing clouds.
Wind
6 mph SSE
Precip
0%
Sunset
Moon Phase
Waxing Gibbous
Cloudy

San Marcos

76°F Cloudy Feels like 76°
Wind
3 mph SSE
Humidity
93%
Sunrise
Sunset

Tonight

Warm and humid with increasing clouds.
77°F Warm and humid with increasing clouds.
Wind
6 mph SSE
Precip
0%
Sunset
Moon Phase
Waxing Gibbous
Cloudy

Lockhart

74°F Cloudy Feels like 74°
Wind
2 mph ESE
Humidity
100%
Sunrise
Sunset

Tonight

Warm and humid with increasing clouds.
77°F Warm and humid with increasing clouds.
Wind
6 mph SSE
Precip
0%
Sunset
Moon Phase
Waxing Gibbous
Partly Cloudy

Llano

71°F Partly Cloudy Feels like 71°
Wind
4 mph S
Humidity
96%
Sunrise
Sunset

Tonight

Partly cloudy skies. A stray shower or thunderstorm is possible. Low around 75F. Winds SSE at 10 to 15 mph.
75°F Partly cloudy skies. A stray shower or thunderstorm is possible. Low around 75F. Winds SSE at 10 to 15 mph.
Wind
13 mph SSE
Precip
15%
Sunset
Moon Phase
Waxing Gibbous
Cloudy

Blanco

73°F Cloudy Feels like 73°
Wind
6 mph S
Humidity
96%
Sunrise
Sunset

Tonight

Mostly cloudy skies. A stray shower or thunderstorm is possible. Low 74F. Winds SSE at 10 to 15 mph.
74°F Mostly cloudy skies. A stray shower or thunderstorm is possible. Low 74F. Winds SSE at 10 to 15 mph.
Wind
13 mph SSE
Precip
18%
Sunset
Moon Phase
Waxing Gibbous
Partly Cloudy

La Grange

76°F Partly Cloudy Feels like 76°
Wind
0 mph NNE
Humidity
100%
Sunrise
Sunset

Tonight

Mostly cloudy skies this evening. A few showers developing late. Low 78F. Winds SSE at 10 to 20 mph. Chance of rain 40%.
78°F Mostly cloudy skies this evening. A few showers developing late. Low 78F. Winds SSE at 10 to 20 mph. Chance of rain 40%.
Wind
13 mph SSE
Precip
37%
Sunset
Moon Phase
Waxing Gibbous

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