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October 19, 2021

Big Boost

Expert Arts Technicians

Overcast skies above region, or is it Dixie Fireplace smoke?

3 min read

A gray cloud cover blended with a brownish hue of haze coated the Bay Space horizon on Friday and was predicted to do so through at the very least element of the day Saturday, in accordance to the Countrywide Climate Assistance.

By Friday afternoon, air excellent had sunk to “moderate” concentrations in components of the Bay Place, with other individuals displaying readings that indicated the air was harmful for delicate groups.

The phenomenon was getting produced by smoke from the Dixie Fire in Butte and Plumas counties, as properly as wildfires burning in Shasta and Siskiyou counties, mixing with the marine layer that normally covers the Bay Location.

“The marine layer came in with the regular very low clouds,” weather services meteorologist Drew Peterson stated. “And then the smoke from the fires moved to the south, but they stayed above the marine layer.”

The final result, Peterson reported, is that the smoke was hanging small plenty of in the ambiance to block out blue sky but not so lower as to generate harmful air disorders for most men and women.

Air readings by the Bay Spot Air Administration District in the course of the Bay Space were being largely in the “healthy” tier Friday early morning, but lots of locations in the East and South Bays ended up demonstrating worse readings by the afternoon. Residents were encouraged to near windows and doors if they smelled smoke.

There was no this kind of luck in other places these types of as Lake Tahoe, in which the air top quality index calculated by AirNow.gov was showing dangerous ailments on Friday afternoon.

The air high quality also was bad in Sacramento, where the air excellent index as measured by Sacramento Metropolitan Air Top quality District hovered in between 150 and 160 Friday afternoon, a reading through that is harmful. That place was being hit more durable by smoky air than the Bay Location, simply because onshore movement is influencing the smoke, as it is envisioned to do into Saturday and possibly extended, in accordance to forecasters.

“An boost in the onshore flow on Saturday will push a whole lot of that smoke to the east into the Central Valley,” Peterson explained. “That explained, some of that smoke will linger, and additional may perhaps come.”

Temperatures were envisioned to heat up into the higher 90s in the interior Friday — Harmony was forecast to be 99 degrees, and Livermore was predicted to arrive at 97 — but forecasters stated it was a one particular-day spike that wasn’t predicted to impact the typically cooler spots of the location. San Jose was predicted to get to 85, Oakland to 79 and San Francisco to 72 on Friday.

The smoke alone was building some condensation that could occasionally consequence in very small quantities of measurable rain, forecasters mentioned. San Francisco received .05 of an inch right away Wednesday into Thursday.

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