April 4, 2026 8:07 PM

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
8:07 pm, Apr 4, 2026
temperature icon 62°F
overcast clouds
Humidity: 12 %
Pressure: 1018 mb
Wind: 5 mph
Wind Gust: 5 mph
Clouds: 100%
Visibility: 10 km
Sunrise: 6:32 am
Sunset: 7:12 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
11:00 pm
temperature icon
52°/59°°F 0 mm 0% 3 mph 15% 1018 mb 0 mm/h
2:00 am
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48°/53°°F 0 mm 0% 3 mph 17% 1017 mb 0 mm/h
5:00 am
temperature icon
47°/47°°F 0 mm 0% 5 mph 18% 1017 mb 0 mm/h
8:00 am
temperature icon
57°/57°°F 0 mm 0% 4 mph 21% 1018 mb 0 mm/h
11:00 am
temperature icon
70°/70°°F 0 mm 0% 4 mph 11% 1017 mb 0 mm/h
2:00 pm
temperature icon
73°/73°°F 0 mm 0% 4 mph 10% 1015 mb 0 mm/h
5:00 pm
temperature icon
73°/73°°F 0 mm 0% 5 mph 10% 1014 mb 0 mm/h
8:00 pm
temperature icon
63°/63°°F 0 mm 0% 4 mph 17% 1014 mb 0 mm/h