A 400-mile blanket of fog has socked in California’s Central Valley for weeks. Scientists and meteorologists say the circumstances for such persistent cloud cowl are ripe: an early moist season, chilly temperatures and a steady, unmoving excessive strain system.
However take a stroll by means of X, Instagram or TikTok, and also you’ll see not everyone seems to be so sanguine.
Individuals are reporting that the fog has an odd consistency and that it’s nefariously suffering from black and white particles that don’t appear regular. They’re calling it “mysterious” and underscoring the title “radiation” fog, which is the scientific descriptor for such pure fog occasions — not a sign that they carry radioactive materials.
An X consumer with the deal with Wall Road Apes posted a video of a person who stated he’s from Northern California drawing his finger alongside fog condensate on the grill of his truck. His finger comes up lined in white.
“What is that this s— proper right here?” the person says because the digicam zooms in on his finger. “There’s one thing within the fog that I can’t clarify … Verify y’all … y’all loopy … What’s happening? They acquired asbestos in there.”
One other consumer, @wesleybrennan87, posted a photograph of two airplane contrails crisscrossing the sky by means of a break within the fog.
“For anybody following the dense Tule (Radiation) fog within the California Valley, it lifted for a second as we speak, simply to see they’ve been fairly lively over our heads …” the consumer posted.
Scientists affirm there may be stuff within the fog. However what it’s and the place it comes from, they are saying, is disappointingly mundane.
The Central Valley is thought to have a few of the worst air air pollution within the nation.
And “fog is very prone to pollution,” stated Peter Weiss-Penzias, a fog researcher at UC Santa Cruz.
Fog “droplets have numerous floor space and are suspended within the air for fairly a very long time — days or perhaps weeks even — so throughout that point the water droplets can take in a disproportionate amount of gasses and particles, that are in any other case often known as pollution,” he stated.
He stated whereas he hasn’t finished any analyses of the Central Valley fog throughout this newest occasion, it’s not exhausting to think about what might be lurking within the droplets.
“It might be an entire alphabet soup of various issues. With all of the agriculture on this space, trade, vehicles, wooden smoke, there’s an entire bunch” of contenders, Weiss-Penzias stated.
Reviews of the fog changing into a gelatinous goo when left to sit down are additionally not fully shocking, he stated, contemplating all of the airborne organic materials — fungal spores, vitamins and algae — floating round that may additionally adhere to the Velcro-like drops of water.
He stated the excellent news is that whereas the first route of publicity for individuals of this materials is inhalation, the fog droplets are comparatively large. Meaning when they’re breathed in, they gained’t go too deep into the lungs — not just like the particulate matter we inhale throughout sunny, dry days. That stuff can get manner down into lung tissue.
The larger concern is ingestion, because the fog covers vegetation or open water cisterns, he stated.
So be sure to’re washing your greens, and something you allow exterior that you simply would possibly nosh on later.
Dennis Baldocchi, a UC Berkeley fog researcher, agreed with Weiss-Penzias’ evaluation, and stated the storm system predicted to maneuver on this weekend will doubtless push the fog out and free the valley of its chilly, soiled scarf.
However, if a excessive strain system returns within the coming weeks, he wouldn’t be shocked to see the area encased in fog as soon as once more.

