August 20, 2026 9:13 PM

Chance of Thunderstorms in Friday Forecast

SOUTHERN CALIFORNIA, CA. (Pain In The Pass) >> The Southern California Weather Force Forecast calls for a chance of scattered rain showers and thunderstorms on Friday.

These 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 40 to 60+ mph in the region.

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

“When Thunder Roars, Go Indoors”

If you travel through the Cajon Pass or on Interstate 15 and on I-40. Expect traffic due to the weather condition can change quickly. Remember to SLOW DOWN in the rain and or blowing dust.

Each storm cell is a chance of a new start of a brush fire could be possible due to lighting strikes across the mountains and desert area. Fire Weather Alert considerations for Friday, a lightning strike could ignite a new wildfire.

More monsoon weather is in Monday and Tuesday forecast.

With weather updates from the Southern California Weather Force and the Zone Watch app. They will post updates on the weather, so join both.

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If you do get into an accident, click or call the trusted professionals of Lerner, Moore, Silva, Cunningham & Rubel Professional Law Corporation.

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Cajon Pass
9:13 pm, Aug 20, 2026
temperature icon 80°F
broken clouds
Humidity: 16 %
Pressure: 1014 mb
Wind: 12 mph
Wind Gust: 15 mph
Clouds: 71%
Visibility: 10 km
Sunrise: 6:14 am
Sunset: 7:31 pm
  • Temperature
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11:00 pm
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72°/77°°F 0 mm 0% 3 mph 25% 1015 mb 0 mm/h
2:00 am
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69°/73°°F 0 mm 0% 4 mph 30% 1015 mb 0 mm/h
5:00 am
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66°/66°°F 0 mm 0% 3 mph 34% 1016 mb 0 mm/h
8:00 am
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73°/73°°F 0 mm 0% 2 mph 21% 1016 mb 0 mm/h
11:00 am
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87°/87°°F 0.2 mm 20% 8 mph 19% 1015 mb 0 mm/h
2:00 pm
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91°/91°°F 0 mm 0% 20 mph 19% 1013 mb 0 mm/h
5:00 pm
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87°/87°°F 0 mm 0% 12 mph 21% 1012 mb 0 mm/h
8:00 pm
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78°/78°°F 0 mm 0% 10 mph 35% 1014 mb 0 mm/h