San Bernardino County Mountains storm history

Snow levels down to as low as 3500 feet, combined with a long-duration atmospheric river event, allowed for several feet of accumulating snow to occur at various locations in the San Bernardino County Mountains. Some notable snow totals include: 80-97 inches of snow at Snow Valle…

An historic winter storm continued to produce very heavy snowfall in the San Bernardino County Mountains on March 1st. The final round of snow with this storm resulted in additional snowfall totals of anywhere from a few inches at some mountain communities between 5000-6000 feet …

Reports of a fatal crash along Interstate 15 along the Cajon Pass occurred with areas of dense fog. This was an indirect injury, as a driver went into oncoming traffic and killed a motorcyclist.

The El Dorado wildfire started at approximately 10:40 AM on September 5th, scorching 22,680 acres over a 23 day period into parts of the San Bernardino and Riverside County Mountains. The fire forced road closures (including State Highway 38) and the evacuations of Oak Glen, nort…

Broadcast media reported a missing hiker on Mount Baldy on December 8th, with treacherous winter weather conditions on the mountain. A search and rescue worker died on December 14th after falling down an icy ravine while searching for the hiker. All search and rescue operations w…

A chain reaction car accident occurred around 0630 PST when a tractor-trailer came around a bend along northbound Interstate 15 near Oak Hills Road and swerved to avoid slowed traffic ahead. A second pileup occurred shortly afterward about one-quarter mile south of the first acci…

The Bridge fire began at 215 pm PDT September 8th, 2024, suspected to have started by lightning. Excessive heat occurred leading up to the day of the wildfire. The wildfire grew to 35,000 acres on Tuesday September 10th, burning along the ridgeline of the San Gabriel mountains up…

Local media reported a 19 car pileup on southbound I-15 in the Cajon Pass due to dense fog in the morning hours of January 16th. 35 patients were treated for minor to moderate injuries.

Foggy conditions attributed to a 30-vehicle crash on Interstate 15 near Oak Hill Road and Highway 138 interchange in the Cajon Pass. The crash occurred around 1030 PST when two vehicles became disabled in a collision south of Oak Hill Road. This resulted in a collision of crashes…

Dense fog dropped visibilities to 20 feet in the Cajon Summit on Interstate 15 during the morning commute. Ten separate crashes occurred involving 30 vehicles.

Highway 330, one of the main routes to Big Bear in the San Bernardino Mountains, collapsed near mile marker 35 on December 20. The force of the water coming down the mountain washed the hillside out from underneath the road itself, causing the collapse. Repairs to the road could …

Mesonet 7 mi N Big Bear City measured 76 mph gust.

Mesonet station HHPC1 Heaps Peak RAWS measured 76 mph gust.

Scaffolding at Lake Arrowhead Village destroyed by winds; reported to have occurred during the night (prior to sunrise 12/24/25). Wind Gusts 4-6 AM were 45 to 55 mph around Lake Arrowhead.

Large rockslide covering both sides of a mountain highway. Wind gusts in the area were around 50-65 mph. Rockslides appears to have been triggered by strong winds as only light precipitation had occurred in the area prior.

SCE Cajon Lookout Rd observation station reported an 80 mph wind gust at 10:10 am.

Burns Canyon station measured 91 mph wind gust.

Lake Fire started around 4pm on June 28th on the western slopes of Silverwood Lake. As of 8pm on the 28th, fire is near 500 acres and has prompted evacuation warnings and orders in the area. Road closure on Highway 138 from Old Mill to Interstate 15 and Highway 173 at highway 138…

A trained spotter reported 2 inches of snow 3 miles NE of Running Springs.

Dept of Highways reported 5 niches of snow 8 miles SSE of Big Bear City.

Dept of Highways reported 4 inches of snow 1 mile ESE of Forest Falls.

Dept of Highways reported 2 inches of snow 3 mile s WSW of Big Bear City.

Dept of Highways reported 1 inch of snow 3 miles NNE of Mt. Baldy.

Dept of Highways reported 4 inches of snow 6 miles NW of Forest Falls.

Corrects previous snow report from 2 ENE Running Springs. At 6200 feet - Chain control on SR18. Dept of Highways report measured 3 inches of snow.

Trained spotter reported 2.5 inches of snow 1 mile west of Big Bear City.

Dept of Highways reported 2 inches of snow 3 miles NE of Running Springs.

NWS employee reported 1 inch of snow 3 miles SW of Running Springs.

A public source reported 2.5 inches of snow. Location was 1 mile west of Big Bear City (long: -116.8557, lat: 34.2695).

Heavy snowfall with up to 16 inches at Snow Valley and Green Valley lake along SR 18.

Gust 103 mph at Marshall Peak. Nearby site from Socal Edison was 92 mph. Santa Ana winds. Peak of 103 mph was 645 pm January 7, 2025.

Burns Canyon RAWS reported gust 65 mph at 3 pm. Gust 56 mph reported at Whitewater RAWS at 4 pm on December 12, 2024. This was a west wind (onshore flow).

Heaps Peak RAWS has a 62 mph gust of Santa Ana winds at 5 am November 4.

Arrowhead Springs SCE had a gust to 66 mph at 140 pm.

Lower Lytle Creek ridge SCE mesonet (east of Mt Baldy) had measured gust of 70 pm at noon October 18, 2024.

Public cameras showed a transition from hail to graupel (snow pellets) to dry snow over San Gorgonio mountain. This was also observed by dual pol radar algorithms.

The Line fire began at 930 am September 5, 2024 at Baseline and Aplin Streets near Highland California. High temperatures on September 5 were 107 to 112F where the fire began. The fire burned north into the Santa Ana drainage due to upslope wind flow. The wildfire grew to 36,000 …

Summit fire on SR173 near Silverwood Lake, burned 75 acres.

San Clemente lifeguards reported dense fog with 1/8 SM visibility.

High temperatures in the mountains were in the 90s to around 100F between July 1 and July 12, 2024. Highs reached as hot as 103 to 109F up to elevation 4000 feet, especially on July 5, 10 and 11, 2024. Big Bear Lake at 7000 feet had high temperatures in the lower 90s.

A late season winter storm led to accumulating snow at many mountain communities in Southern California. Some notable snowfall totals include: 14 inches at Snow Valley (7000-8000' in elevation), 14 inches at Bear Mountain Snow Summit (7000-8200'), 12 inches at all of Arrowbear La…