August 26, 2026 9:32 PM

More Pop-Up Thunderstorms are in the Forecast Today

HIGH DESERT, CA. (Pain In The Pass) >> The Southern California Weather Force Forecast calls for mostly cloudy skies for Sunday with a 30% chance of scattered afternoon and evening showers and thunderstorms. Today high will be mid 100s to 110+ degrees. Mountains temps will be in the mid 80s to 90+ degrees.

Monday Forecast will be nearly the same as Sunday.

A promising cooler weather pattern change begins on Tuesday with temperatures will feel more normal or below normal temps across Southern California.

A ridge of high pressure has continued to affect SoCal. Today thunderstorms can produce little to a lot of precipitation at times, especially considering the faster movement of storm activity. Each thunderstorm cell will also be capable of producing gusty, erratic outflow winds, gusting upwards of 45 to 60+ mph in region, that can make a dust storm.

The peak time of a afternoon pop-up thunderstorm can start before 1pm to 4pm and can last until 7pm with the heat in the air.

The heaviest downpours can have the potential to bring a quick 1-2 inches of rain. The risk for localized flash flooding is low to modrate, but cannot be ruled out because the ground is dry and the burn scars areas.

“When Thunder Roars, Go Indoors”

If you travel through the Cajon Pass or on Interstate 15 expect traffic due to the weather condition can change quickly. Remember to SLOW DOWN in the rain and or blowing dust.

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Cajon Pass
9:32 pm, Aug 26, 2026
temperature icon 81°F
clear sky
Humidity: 21 %
Pressure: 1012 mb
Wind: 6 mph
Wind Gust: 5 mph
Clouds: 5%
Visibility: 10 km
Sunrise: 6:18 am
Sunset: 7:24 pm
  • Temperature
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  • Wind
  • Humidity
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11:00 pm
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74°/78°°F 0 mm 0% 2 mph 27% 1012 mb 0 mm/h
2:00 am
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73°/76°°F 0 mm 0% 1 mph 28% 1012 mb 0 mm/h
5:00 am
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70°/70°°F 0 mm 0% 1 mph 27% 1012 mb 0 mm/h
8:00 am
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76°/76°°F 0 mm 0% 2 mph 22% 1013 mb 0 mm/h
11:00 am
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87°/87°°F 0 mm 0% 5 mph 18% 1013 mb 0 mm/h
2:00 pm
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93°/93°°F 0 mm 0% 14 mph 16% 1010 mb 0 mm/h
5:00 pm
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89°/89°°F 0 mm 0% 5 mph 20% 1010 mb 0 mm/h
8:00 pm
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77°/77°°F 0 mm 0% 3 mph 38% 1012 mb 0 mm/h