June 4, 2026 10:21 AM

Chance of Isolated Thunderstorms This Afternoon

BIG BEAR, CA. (Pain In The Pass) >>Friday afternoon will feature a blend of sun and clouds, with a good chance of pop-up thunderstorms in the afternoon and in the evening. It will be hot and humidity will be up, with highs in the 100s to mid-110s.

Southern California Weather Force is predicting isolated to scattered showers and thunderstorms to sweep across Southern California Friday through the weekend. The of threats are dry lightning, and gusty winds, according to SCWF.

Today flow will be east-northeast. This means that storms forming first over Big Bear Lake will shove outflow through the Lucerne Valley zones, and into parts of the Apple Valley forecast area.

Stateline Primm is not out of the chance of a popup storm.

It looks like the best chances will be mainly in the early to late afternoon hours today. Today’s strom chances are right around 10% and tomorrow’s chances are at 30%.

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 today, 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
10:21 am, Jun 4, 2026
temperature icon 83°F
clear sky
Humidity: 15 %
Pressure: 1011 mb
Wind: 6 mph
Wind Gust: 7 mph
Clouds: 0%
Visibility: 10 km
Sunrise: 5:37 am
Sunset: 7:58 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure
11:00 am
temperature icon
68°/83°°F 0 mm 0% 7 mph 15% 1010 mb 0 mm/h
2:00 pm
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81°/82°°F 0 mm 0% 14 mph 16% 1010 mb 0 mm/h
5:00 pm
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79°/80°°F 0 mm 0% 18 mph 14% 1009 mb 0 mm/h
8:00 pm
temperature icon
68°/68°°F 0 mm 0% 10 mph 34% 1010 mb 0 mm/h
11:00 pm
temperature icon
61°/61°°F 0 mm 0% 5 mph 44% 1011 mb 0 mm/h
2:00 am
temperature icon
58°/58°°F 0 mm 0% 3 mph 32% 1010 mb 0 mm/h
5:00 am
temperature icon
55°/55°°F 0 mm 0% 2 mph 24% 1010 mb 0 mm/h
8:00 am
temperature icon
64°/64°°F 0 mm 0% 4 mph 14% 1010 mb 0 mm/h