April 13, 2026 10:29 AM

Pop-Up Thunderstorms are in the Forecast

HIGH DESERT, CA. (Pain In The Pass) >> The Southern California Weather Force Forecast calls for mostly sunny skies for Wednesday with a 20% chance of scattered afternoon and evening showers and thunderstorms. The high will be mid 100s to 110+ degrees. 

A promising weather pattern change begins on Friday with temperatures will feel more normal across Southern California before another warming trend..

Today thunderstorms will be high-based and 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.

The heaviest downpours can have the potential to bring a quick 1-2 inches of rain. The risk for localized flash flooding is low, 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
10:29 am, Apr 13, 2026
temperature icon 47°F
scattered clouds
Humidity: 67 %
Pressure: 1016 mb
Wind: 7 mph
Wind Gust: 9 mph
Clouds: 39%
Visibility: 10 km
Sunrise: 6:20 am
Sunset: 7:19 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
11:00 am
temperature icon
48°/48°°F 0.25 mm 25% 8 mph 67% 1016 mb 0 mm/h
2:00 pm
temperature icon
50°/52°°F 1 mm 100% 5 mph 65% 1016 mb 0 mm/h
5:00 pm
temperature icon
50°/51°°F 1 mm 100% 7 mph 61% 1015 mb 0 mm/h
8:00 pm
temperature icon
47°/47°°F 0.94 mm 94% 8 mph 61% 1015 mb 0 mm/h
11:00 pm
temperature icon
45°/45°°F 0.2 mm 20% 7 mph 79% 1017 mb 0 mm/h
2:00 am
temperature icon
43°/43°°F 0 mm 0% 6 mph 83% 1018 mb 0 mm/h
5:00 am
temperature icon
41°/41°°F 0 mm 0% 2 mph 80% 1018 mb 0 mm/h
8:00 am
temperature icon
46°/46°°F 0 mm 0% 2 mph 61% 1019 mb 0 mm/h